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Weather in Blue Lagoon
Geothermal spa of milky-blue waters in lava fields
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About Blue Lagoon
The Blue Lagoon is a geothermal accident turned global phenomenon: seawater mixed with geothermal runoff from a nearby power plant creates milky-blue, mineral-rich warmth in the heart of a black lava field. Bathers float in this otherworldly, 37-40°C liquid suspended in a landscape of ancient dark stone—healing, surreal, utterly Instagram-proof. It's perhaps the most over-touristed attraction in Iceland, yet the experience still delivers.
Best months to visit
Year-round
Things to do in Blue Lagoon
Geothermal spa bathing and mineral soaking
Photography in the milky-blue water
Spa treatments and massages
Silica mud mask applications
Dining at in-water restaurants
Nearby lava field exploration
Weather by month
Click any month for detailed weather information and travel tips.
January
3C
Cold, with regular rainfall.
February
3C
Cold, with regular rainfall.
March
3C
Cold, with regular rainfall.
April
6C
Cold, with regular rainfall.
May
9C
Cold, with regular rainfall.
June
11C
Cool, with regular rainfall.
July
13C
Cool, with some rainy days.
August
13C
Cool, with some rainy days.
September
10C
Cool, with regular rainfall.
October
7C
Cold, with regular rainfall.
November
5C
Cold, with regular rainfall.
December
3C
Cold, with regular rainfall.
The Blue Lagoon's milky-blue, silica-rich waters steam against jet-black lava fields on the Reykjanes Peninsula, just twenty minutes from Keflavík Airport — making it the obvious bookend to any Icelandic trip. Slathering on a mineral mud mask while the wind whips steam sideways across the lagoon, with snow or midnight sun depending on the season, is one of those experiences that genuinely lives up to the photos.
Best areas to stay in Blue Lagoon
Svartsengi geothermal area
The lagoon itself, fed by water from the adjacent geothermal power plant, set in a dramatic field of black lava.
Grindavík
The nearest fishing town, though recent volcanic activity has affected access — check current conditions before planning a stay here.
Keflavík
The airport town, useful as a base for an early flight in or out combined with a lagoon visit.
Reykjavik
Iceland's capital, 45 minutes away, the most practical base for combining the lagoon with the rest of the south-west.
Getting to Blue Lagoon
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Flights
Fly into Keflavík International Airport, Iceland's main gateway, just a short drive from the lagoon.
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From London
~3 hours by air from London to Keflavík.
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Getting around
Transfer buses run directly between the airport, the Blue Lagoon, and Reykjavik; a rental car gives the most flexibility.
Frequently asked questions
When is the best time to visit the Blue Lagoon?
It's open and busy year-round. Winter visits pair the warm water with a chance of the Northern Lights overhead, while summer brings long daylight and milder air for getting in and out.
Do I need to book in advance?
Yes — entry is by timed slot only and popular times sell out days or weeks ahead, especially around flight arrival and departure times.
How do I get to the Blue Lagoon?
It sits between Keflavík Airport and Reykjavik, so most visitors stop on arrival or departure by transfer bus, taxi, or rental car.
What should I bring?
A swimsuit, flip-flops, and conditioner for your hair — the silica is great for skin but can leave hair dry and straw-like if not protected.
How long should I plan to stay?
Most people spend two to three hours, including changing, bathing, a sauna or steam room, and a drink from the swim-up bar.
Traveler reviews
★★★★★
Booked the first slot after landing and it was the perfect way to shake off an overnight flight — warm water, snow on the lava fields, and barely any crowds that early.
Helen R. · March 2024
★★★★☆
Pricier than I expected once you add the robe and a drink, but the setting is genuinely stunning and it's so convenient right by the airport.
Marcus T. · August 2023
★★★★★
Went in the evening hoping for the lights and got a faint aurora while soaking — unforgettable, even if my hair took days to recover from the silica.
Aoife N. · December 2024
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