Best Time To Visit Iceland: The Ultimate Guide

Spring Weather in Iceland

Spring in Iceland is characterized by gradually warming temperatures and increasing daylight. The south experiences milder conditions, while the north can still be quite cold. March sees about 10 hours of daylight, increasing to nearly 20 hours by May. Weather can be unpredictable, with a mix of rain, snow, and sunshine, so it’s essential to be prepared for all conditions. Despite the variability, springtime reveals Iceland's scenic landscapes as they come to life.

Iceland in March

March in Iceland marks the transition from winter to spring, with about 10 hours of daylight and gradually warming temperatures. As the landscape begins to thaw, early spring flowers start to appear, adding a touch of color to the scenery. Visitors can enjoy activities such as glacier hiking, exploring ice caves, and participating in cultural events like the Food and Fun Festival in Reykjavík, which showcases Icelandic cuisine and culinary talent.

Alternatively, you can opt for booking a Reykjavik Food Tour of Icelandic Dishes to taste local delicacies and traditional foods. This month offers a unique blend of winter adventures and the first signs of spring, making it an ideal time to visit.

Iceland in April

April sees a significant increase in daylight, with up to 16 hours by the end of the month. The landscapes are increasingly green, and migratory birds, including puffins which start returning to their nesting sites. Opt for booking a puffin spotting tour from Husavik to ensure that you don’t miss the chance to see them.

This month is perfect for hiking and exploring national parks like Þingvellir and Skaftafell. The weather becomes milder, making outdoor activities more enjoyable. April is also a great time to experience local traditions such as Sumardagurinn Fyrsti (First Day of Summer), a public holiday celebrating the arrival of warmer days.

Iceland in May

 May is one of the best months to visit Iceland, with nearly 20 hours of daylight and mild temperatures. The landscapes are lush and colorful, making it ideal for hiking, exploring waterfalls, and visiting national parks. Wildlife enthusiasts can enjoy bird watching, with many migratory species active during this time.

Check out local museums to get more insight into their local culture. May also hosts the Reykjavík Arts Festival, a major cultural event featuring performances, exhibitions, and concerts. The extended daylight hours allow for more time to explore and appreciate Iceland’s natural beauty.

Summer is the Best Time to Visit Iceland for:

• Hiking and Trekking: Ideal conditions for exploring trails and national parks, including the famous Laugavegur Trail.

Summer Weather in Iceland

Summer in Iceland is characterized by mild temperatures and almost continuous daylight, thanks to the Midnight Sun. The average temperatures range from 10°C to 15°C (50°F to 59°F), providing comfortable conditions for outdoor activities like hiking, glacier lagoon tours, 4-wheeling on black sand beaches, and more.

It often rains during this period, so it’s wise to pack waterproof gear, including waterproof jackets, hats, pants, and shoes. The long days and mild weather make summer the best time to go to Iceland and explore its natural wonders. 

Iceland in June

June marks the beginning of the summer season, with nearly 24 hours of daylight due to the Midnight Sun. This is an excellent time for hiking, camping, and exploring Iceland’s natural beauty.

National parks like Þingvellir, Vatnajökull, and Snæfellsjökull in Snæfellsnes are fully accessible. June is also when puffins are most active, making it a great month for bird watching. The Reykjavík Arts Festival continues, offering a rich cultural experience with performances, exhibitions, and concerts.

Iceland in July

July is often considered the best month to go to Iceland. It is the warmest month in the country, with average temperatures around 13°C (55°F). The landscapes are at their greenest and most lush, making it ideal for outdoor activities such as hiking, horseback riding, and exploring the Raufarholshellir lava tunnels.

July is also a fantastic time for whale-watching along the coast. The country celebrates its National Day on June 17th with parades, concerts, and festivities. The Secret Solstice music festival in Reykjavík draws visitors from around the world, offering a unique blend of music and the Midnight Sun.

Iceland in August

August is still very much summer in Iceland, with long daylight hours and mild temperatures. It’s an excellent time for road trips, as all highland roads and trails are open. Hiking in the highlands, such as the Landmannalaugar region, is at its best.

The Reykjavík Culture Night in late August is a highlight, featuring various cultural events, concerts, and fireworks. The landscapes remain lush, and it’s a great time for exploring waterfalls, hot springs, and volcanic sites.

As the month progresses, there’s a slight chance of catching the early northern lights towards the end of August. If you plan on visiting during this time, check out this blog on everything you need to know for exploring Iceland in August!

Fall is the Best Time to Visit Iceland for:

• Northern lights Viewing: Longer nights increase the chances of seeing the northern lights.

Fall Weather in Iceland

Fall in Iceland brings cooler temperatures and shorter days as the Midnight Sun fades away. Average temperatures range from 0°C to 10°C (32°F to 50°F), creating a crisp atmosphere perfect for outdoor adventures. Though the weather can be unpredictable, with a mix of rain, wind, and occasional early snowfall, it’s a beautiful time to experience Iceland’s changing landscapes.

Fall is best for hiking, visiting waterfalls, and exploring glacier lagoons, with fewer crowds than in summer. Be sure to pack warm, waterproof gear, including jackets, hats, and sturdy shoes, to stay comfortable during your explorations. Plus, fall marks the beginning of the northern lights season, offering the chance to witness this natural phenomenon.

Iceland in September

September is a transition month from summer to fall, with mild temperatures and about 12 hours of daylight. The landscapes start to show their autumn colors, creating a picturesque setting for outdoor activities. It’s a great time for hiking, especially in national parks like Þingvellir and Skaftafell.

September also marks the beginning of the northern lights season, offering excellent viewing opportunities. The Reykjavík International Film Festival, held in late September, brings a cultural touch to the city.

Iceland in October

October brings cooler temperatures and shorter days, with around 8-9 hours of daylight. The fall colors are on full display, making it a perfect time to visit Iceland for photography and exploring the countryside. Hiking, horseback riding, and visiting geothermal areas like the Blue Lagoon and Mývatn Nature Baths are popular activities.

October is also ideal for northern lights hunting, with long nights providing ample opportunities for sightings. The Iceland Airwaves music festival in Reykjavík attracts music lovers from around the world.

Iceland in November

November ushers in the early signs of winter, with temperatures dropping and the first snowfall often occurring. Daylight reduces to about 5-6 hours, enhancing the chances of seeing the northern lights. The landscapes are a mix of autumn colors and fresh snow, creating a unique and beautiful contrast.

November is a great time for winter activities to start, such as glacier hiking and ice caving. The fewer tourists make popular sites like the Golden Circle and South Coast more enjoyable to explore. Cozying up in warm accommodations and enjoying Icelandic cuisine adds to the charm of visiting in November. 

Best Time to Explore Iceland’s National Parks

Visiting Iceland's national parks, such as Thingvellir and Vatnajökull, during early spring or late autumn is ideal. Specifically, aim for May, early June, September, or October. These months offer mild weather and fewer crowds, allowing you to enjoy the stunning landscapes either bursting with spring's blooming colors or adorned with fall's rich, warm hues.

This period is perfect for nature lovers and photographers eager to capture the seasonal beauty. Additionally, it’s a great time for nature walks, fully immersing yourself in the natural splendor of Iceland.

Best Time for Whale Watching in Iceland

For the best whale-watching experience, visit Iceland between June and August. This period offers optimal conditions with long daylight hours, allowing for extended tours. The waters around Iceland are teeming with marine life during these months, increasing your chances of spotting humpback whales, minke whales, and even the majestic blue whale.

Opt for scheduling a whale watching tour by boat to get the best chance to see them. The summer months also provide calm seas, making for a more comfortable and enjoyable boat trip.

Best Time for Glacier Hiking and Ice Caving in Iceland

For glacier hiking and ice caving, the best time to visit Iceland is between November and March. These months provide the safest and most stable conditions for exploring the ice caves and trekking across glaciers.

The colder temperatures ensure that the ice formations are at their most spectacular, offering a breathtaking experience for adventurers. Consider booking a Crystal Treasures of Vatnajökull: Ice Cave Adventure to get a real-life chance to explore an ice cave on a volcanic glacier! 

Best Time for Northern Lights Viewing in Iceland

For the best chance to see the northern lights, plan your visit to Iceland between September and March. These months offer the longest nights, providing more opportunities to witness this natural phenomenon.

Clear skies and minimal light pollution are crucial, so it’s best to head to remote areas away from city lights for an optimal viewing experience.  For the best chance to witness the spectacular aurora borealis over the Icelandic night sky, book this northern lights Tour from Reykjavik with Professional Photos. 

Best Time for Road Trips in Iceland

The best time for road trips in Iceland is during the summer months of June, July, and August. The extended daylight hours of the Midnight Sun provide ample time to explore the country’s diverse landscapes.

Most roads, including those in the highlands, are accessible during this period, allowing you to reach more remote and scenic locations. Check out a popular road trip in southern Iceland to visit popular attractions, or drive all around the island on an Icelandic Ring Road Trip. 

Best Time for Festivals and Cultural Events in Iceland

To experience Iceland’s rich culture and festivals, visit during the summer months of June to August. This period is packed with events such as the Reykjavík Arts Festival, Secret Solstice music festival, and the National Day celebrations on June 17th. These festivals offer a fantastic opportunity to experience the local Icelandic culture, music, and traditions. 

Best Time for Horseback Riding in Iceland

The best time for horseback riding in Iceland is during the summer months of June, July, and August. The mild weather and long days make it ideal for exploring the countryside on horseback. Icelandic horses are renowned for their unique gait; the tölt. The summer provides the perfect conditions to experience this delightful ride through diverse terrains. Consider joining this Icelandic Horseback Riding Tour from Reykjavik for an unforgettable experience. 

Best Time for Visiting Reykjavík in Iceland  

The best time to visit Reykjavík is from June to August. These summer months offer mild temperatures, extended daylight hours due to the Midnight Sun, and a rich cultural scene. Major events like the Reykjavík Arts Festival and National Day celebrations occur during this period.

The weather is ideal for exploring the city's attractions, parks, and nearby natural wonders, making it the perfect season for tourists to experience the capital's unique charm and lively atmosphere. This 5-Day Iceland City Break in Reykjavík is the perfect vacation package to explore the best of Reykjavik. 

For more information on everything you need to know about when to visit, check out this blog on the best time to visit Reykjavik!

Best Time for Touring the Golden Circle in Iceland

The best time to tour the Golden Circle is from June to September. Summer provides the best weather, with mild temperatures and long daylight hours, allowing for extended exploration of key sites like Þingvellir National Park, Geysir Geothermal Area, and Gullfoss Waterfall. Roads are fully accessible, and the landscapes are lush and green.

This Golden Circle, Kerid Volcanic Crater, and Blue Lagoon Day Trip from Reykjavik offers the perfect way to explore the best of each attraction without having to worry about transportation.

Best Time for Enjoying the Blue Lagoon and Spas in Iceland

Any time is the best time to enjoy the Blue Lagoon and other spas in Iceland. However, many visitors prefer the warmer months from May to September for comfortable outdoor lounging. Winter visits offer a unique experience, with the contrast of warm waters and surrounding snow, making it particularly magical.

Another local spa that is conveniently in the capital area, is the Sky Lagoon. This is a great option for those who want to stay in the Reykjavik area. Early morning or late evening visits provide a more tranquil experience, avoiding peak tourist times and allowing for a peaceful soak in the geothermal waters. Another gem to visit is the Secret Lagoon, offering an exclusive and relaxing experience in Icelandic nature. 

Staying 3-4 days in Iceland is perfect for a City Break 

This amount of time is perfect for weekend getaways or city breaks. You'll have just enough time to explore Reykjavík’s unique charm, visit its stunning architecture, walk through its engaging museums, and experience the local nightlife.

A short drive from the capital will take you to the Golden Circle, where you can marvel at the natural wonders of Þingvellir National Park, the Geysir Geothermal Area, and the breathtaking Gullfoss Waterfall. Don’t miss the chance to unwind at the Blue Lagoon, a world-renowned geothermal spa offering a perfect blend of relaxation and luxury. To enhance your trip, consider booking this 4-day Icelandic road trip from Reykjavik. 

Highlights:

• Reykjavík: Explore the charming capital city, with its unique architecture, museums, and nightlife.
• Golden Circle: Visit Þingvellir National Park, Geysir Geothermal Area, and Gullfoss Waterfall, all within an hour's drive from the capital. 
• Blue Lagoon: Relax in the world-famous geothermal spa.

Staying 5-7 days is the perfect amount of time for a cheap holiday in Iceland

The right amount of time for a cheap holiday in Iceland is between 5-7. Ideal for budget-conscious travelers, this duration allows you to explore the country's stunning landscapes without breaking the bank. Extend your journey along the Golden Circle and South Coast with popular tours and experiences, taking in iconic sites like Seljalandsfoss and Skógafoss waterfalls. Venture to the Snæfellsnes Peninsula, known for its diverse scenery and affordable accommodation options.

For significant savings on lodging, consider camping at one of Iceland’s many well-equipped campsites, offering a unique and immersive experience. To enhance your affordable Icelandic adventure, consider a city break in Dublin. This lively city is known for its rich history, local pub culture, and budget-friendly attractions, providing an excellent complement to your Icelandic travels. To make the most of your journey, consider booking this cheap 6-day city break in Reykjavik.

Highlights:

• Golden Circle and South Coast: Extend your exploration with budget-friendly tours and self-guided hikes.
• Snæfellsnes Peninsula: Discover diverse landscapes with affordable accommodation options.
• Camping: Take advantage of Iceland's campsites to save on accommodation costs.

Staying 7-10 days is the perfect amount of time for a luxury holiday in Iceland

To enjoy a luxury holiday in Iceland, it is recommended to plan for a vacation of around 7-10 days. Perfect for travelers seeking high-end experiences, this duration allows you to fully indulge in the country's finest offerings. Enjoy luxury stays at 5-star hotels and savor gourmet dining in Reykjavík.

Elevate your trip with exclusive private tours of the Golden Circle and South Coast, where you can explore iconic sites at your own pace. Treat yourself to exclusive activities such as private glacier hikes, helicopter tours, and high-end spa treatments for a truly unforgettable experience. To further enhance your luxury Icelandic adventure, consider booking this luxury one-week Iceland city break in Reykjavik.

Highlights:

• Luxury Stays: Indulge in 5-star hotels and gourmet dining recommendations in Reykjavík.
• Private Tours: Experience exclusive tours of the Golden Circle and South Coast.
• Exclusive Activities: Enjoy private glacier hikes, helicopter tours, hot springs spa or other customizable tour options.

Staying 10-14 days is the right amount of time for a road trip around Iceland

A 10-14 day trip is the perfect amount of time for a road trip around Iceland. Perfect for in-depth exploration and adventure enthusiasts, this duration allows you to fully experience the country's diverse landscapes. Drive along the Ring Road to see major sights and landmarks, taking in the breathtaking beauty of Iceland's natural wonders.

Explore the remote and scenic East Fjords and Westfjords, where you'll encounter fewer tourists and stunning vistas. Venture into the rugged Highlands to discover unique landscapes such as Landmannalaugar and Askja, offering a truly immersive adventure. Consider extending your journey with this 12-day Iceland road trip from Reykjavík to Vík, Höfn, and more.

Highlights:

• Ring Road: Drive around the entire country, experiencing major sights.
• East Fjords and Westfjords: Explore remote and scenic areas with fewer tourists.
• Highlands: Venture into the rugged interior for unique landscapes like Landmannalaugar and Askja.

14 days or more is ideal for exploring all of Iceland, including the Highlands and Westfjords

Spending 14 days or more is perfect for thoroughly exploring all of Iceland, including the Highlands and Westfjords. Perfect for slow travel and immersive experiences, this duration allows you to fully enjoy the country's diverse regions. Take your time on the Ring Road, making more stops and side trips. Spend several days in each region, from the Westfjords to the East Fjords and Highlands.

Learn about the local Icelandic culture with guided tours and activities like glacier hiking, whale watching, and horseback riding. Tailor the duration of your visit to match your interests and ensure a memorable Icelandic adventure. Consider booking this Two-Week Iceland Road Trip from Reykjavík to have an unforgettable vacation in Iceland. 

Highlights:

• In-depth Ring Road: Take your time with more stops and side trips.
• Multiple Regions: Spend several days in each region, from the Westfjords to the East Fjords and Highlands.
• Local Experiences: Experience Icelandic culture, join guided tours and participate in activities like glacier hiking, whale watching, and horseback riding.

Peak Tourist Season in Iceland

The peak tourist season is during the summer between June and September when the weather is favorable and the days are long. Popular attractions like Þingvellir National Park and the Blue Lagoon are the busiest. To avoid crowds, consider visiting during the shoulder seasons of spring or fall.

Flexibility and Car Rentals in Iceland

Be prepared for unpredictable weather and have flexible plans. Renting a car allows you to explore at your own pace, especially if planning a Ring Road trip. Iceland’s road system is extensive and straightforward. The Ring Road circles the island, connecting the most populated areas and major attractions. It's open year-round, except during extreme blizzards. To explore the Highlands, you'll need a 4x4 vehicle for the F-roads, which are accessible from June to August.

If you plan on exploring Iceland's stunning landscapes by car, be prepared for challenging road conditions. Many roads are gravel or dirt, and weather can change quickly. Make sure to rent a 4x4 vehicle if you plan on driving off the main roads, and always check road conditions before setting out.

Iceland's natural beauty is a big draw for visitors, but it's important to respect the environment while you're there. Stick to designated paths, don't disturb wildlife, and always pack out your trash. Iceland's fragile ecosystems need to be protected for future generations to enjoy.

Getting To and From Iceland

You can reach Iceland by airplane, with Keflavík International Airport serving as the primary entry point for travelers. Located about 50 kilometers southwest of Reykjavík, this modern airport welcomes flights from various international destinations, making it convenient for travelers worldwide. You can easily book an airport transfer to and from Reykjavik to ensure a hassle-free trip. Whether you're flying from North America, Europe, or beyond, you’ll find numerous direct routes to Keflavík International Airport. 

For the best travel experience, it's important to book your flights early and compare different airlines for the best deals. Consider factors such as flight duration, layovers, and amenities to ensure a comfortable journey. Ready to start planning your Icelandic adventure? Check out the best flights to Iceland and secure your tickets today! 

Accommodation - Where to Stay in Iceland

Iceland offers a wide range of accommodations, from budget-friendly hostels and camping grounds to luxury hotels and cozy bed and breakfasts. Booking in advance is essential, especially during peak season, to secure the best options and prices. For a luxurious stay, consider hotels like the Exeter Hotel or The Retreat at Blue Lagoon. Budget travelers might prefer hostels such as Kex Hostel. For a more cozy and cultural experience, consider booking a bed and breakfast or guesthouse during your stay in Iceland. During the peak summer season, accommodation in Iceland can be booked up quickly. Be sure to book your hotel well in advance to secure the best options and prices. 

Travel Costs in Iceland

Iceland can be expensive, but it's possible to manage your budget. Using local transportation, staying in hostels or camping, and cooking your own meals can keep costs down. Expect to spend around $80 a day on a budget or $250+ a day if renting a car and dining out. To save money, consider shopping for groceries at local supermarkets like Krónan. Public transportation, such as buses, is reliable and can be a cost-effective way to travel within cities.

Additionally, many of Iceland's natural attractions, like waterfalls and national parks, are free to visit. Taking advantage of free or low-cost activities can help stretch your budget further. Alternatively, consider booking a vacation package like this cheap 6-Day city break in Reykjavík to optimize your budget. 

Safety Tips and What to Wear in Iceland

Iceland is renowned as one of the safest countries in the world, boasting low crime rates and no dangerous wildlife. However, the weather can be highly unpredictable. Always be prepared for sudden changes, and don’t venture into the wilderness without proper equipment. Regularly check forecasts and road conditions to stay safe.

Visit the local official website for Reykjavik for more important information. For information on Icelandic weather, visit the local Icelandic weather page to ensure you're well-informed before setting out on your adventures. Regardless of when you visit, packing appropriately for Iceland’s ever-changing weather is crucial. Here’s what you should bring:

• Layers: Dress in layers to adjust easily to varying temperatures. Consider purchasing a traditional Icelandic wool sweater called a “Lopapeysa”.
• Waterproof Clothing: A waterproof jacket/parka, pants, hat, and gloves are essential to stay dry in rain and snow.
• Sturdy Shoes: Durable, waterproof hiking boots are a must for exploring rugged terrains.
• Swimsuit: Don’t miss the chance to dip in Iceland’s famous geothermal pools.
• Good Camera: Capture breathtaking landscapes and unforgettable moments.

By packing these essentials, you'll be well-prepared to enjoy all that Iceland has to offer, from its dramatic scenery to its relaxing hot springs.

What is the best month to visit Iceland?

The best month to visit Iceland depends on what you want to experience, but the most popular is July. June to August offers the Midnight Sun and pleasant weather, perfect for exploring natural sights and hiking.

For northern lights enthusiasts, September to April is ideal, with longer nights and clearer skies. Each season offers unique experiences, from winter's snowy landscapes to summer's lush greenery. Consider your interests and activities when choosing the best month for your Icelandic adventure. Check out the best things to do in Iceland to help you decide when to go.

How many days do you need in Iceland?

To fully appreciate Iceland's diverse landscapes and attractions, it is recommended to plan to stay in Iceland for at least 7-10 days. This allows you time to explore popular sites like the Golden Circle, Blue Lagoon, and South Coast while also venturing to other top destinations in Iceland. A week or more gives you time to enjoy outdoor activities like glacier hiking, whale watching, and hot springs. Shorter trips are possible but may limit your experience.

Can you do Iceland in 3 days?

While 3 days in Iceland is brief, it's possible to see some highlights. Focus on the Golden Circle, including Thingvellir National Park, Geysir, Gullfoss waterfall, and other top attractions in Iceland. Spend a day exploring Reykjavik and relaxing at the Blue Lagoon. Although you might miss out on some landmarks and attractions, a short trip can still provide a memorable glimpse of Iceland's unique landscapes, making you want to come back for more. 

What is the cheapest month to visit Iceland?

The cheapest months to visit Iceland are typically November, January, and February. During these off-peak months, you'll find lower prices for flights, accommodations, and tours. The weather can be cold and unpredictable, but winter offers unique experiences like the northern lights and fewer crowds at popular sites. Be prepared for limited daylight and potential road closures due to snow, but enjoy the cost savings and a quieter travel experience.

What months can you see the northern lights from Iceland?

The northern lights are visible in Iceland from late September to early April. The best months for viewing are typically October through March, when the nights are the longest and darkest. For the best chances, visit during clear, cold nights away from city lights. Rural areas and the northern part of the country often provide the best viewing opportunities. Patience and luck are key, as the Northern Lights can be unpredictable. To ensure that you get to see this majestic display of aurora, opt for booking this 3-day northern lights & south Iceland private tour. 

What month is rainy in Iceland?

October is typically the rainiest month in Iceland. During this time, you can expect frequent showers and overcast skies, particularly in the southern and western parts of the country. While the rain can make some outdoor activities challenging, it also contributes to the lush green landscapes and stunning waterfalls. Pack waterproof clothing and plan indoor activities or shorter outdoor excursions to make the most of your visit despite the wetter weather.

How much money do you need for 1 week in Iceland?

For a one-week trip to Iceland, it is recommended to budget around $2,000 to $2,500 per person. This estimate includes mid-range accommodations, meals, transportation, and popular tours or activities. Costs can vary widely depending on your travel style and preferences. Opt for budget accommodations, cook some meals, and take advantage of free attractions to save money. Factor in additional expenses for unique experiences like glacier hikes, whale watching, or the Blue Lagoon.

Can you see whales from Reykjavik Harbor?

Yes, you can see whales from Reykjavik Harbor! While you might get lucky and spot a whale by the docks, a surefire way to see one is by joining a whale-watching tour from Reykjavik. These tours offer the chance to spot various species like Minke whales, Humpback whales, and sometimes even Orcas. Summer months, from April to October, are particularly good for sightings due to more favorable weather and higher whale activity. Tours typically last a few hours and provide an exciting opportunity to observe these magnificent creatures in their natural habitat.

Is Blue Lagoon worth it?

Absolutely, the Blue Lagoon is a must-visit for many travelers to Iceland. It's a unique geothermal spa with milky-blue waters, surrounded by a striking volcanic landscape. The experience is relaxing and the facilities are well-maintained, offering amenities like silica mud masks, saunas, and in-water massages. While it can be pricey and crowded, many find the ambiance and therapeutic waters justify the cost. For a memorable Icelandic experience, the Blue Lagoon is often considered a must-visit.

How do I get to Blue Lagoon from Reykjavík?

To get to the Blue Lagoon from Reykjavík, you can take a bus, taxi, or drive. The Blue Lagoon is about a 45-minute drive from the city. Several bus companies offer regular shuttle services from Reykjavík to the Blue Lagoon, with some including hotel pick-ups. To make your trip as effortless as possible, opt for Blue Lagoon entry with a transfer. If you prefer to drive, follow Route 41 towards Keflavík International Airport, then take Route 43 towards Grindavík and follow signs for the Blue Lagoon.