Every Geothermal Lagoon in Iceland, Compared

Neither is objectively 'better' — they suit different trips. The Blue Lagoon is the milky-blue icon on the Reykjanes Peninsula, only 20 minutes from Keflavík Airport, which makes it ideal as your first or last stop. The Sky Lagoon is newer, sits on the edge of Reykjavík (about 15 minutes from the city centre), and is built around an ocean-facing infinity pool and a seven-step spa ritual. Choose the Blue Lagoon for the classic bucket-list soak near the airport; choose Sky Lagoon if you're staying in the city and want the infinity-edge and ritual.

Among the well-known lagoons, the Secret Lagoon in Flúðir is the cheapest, with admission from around $34. The Mývatn Nature Baths in the north are next, from around $63. The Blue Lagoon and Sky Lagoon are the premium options, starting around $115–$130 for basic admission.

For the Blue Lagoon and Sky Lagoon, yes — both use timed-entry slots and regularly sell out days or weeks ahead in summer and over the holidays. Book as early as you can. The Secret Lagoon, Hvammsvík and Mývatn Nature Baths are more relaxed and often have same-day space, but booking ahead still guarantees your slot.

Most sit between roughly 38°C and 40°C (100–104°F) — warm-bath temperature — so you can stay in for a long time even when the air is near freezing. Natural pools like Hvammsvík vary pool to pool, from very warm down to a cold plunge on the sea's edge.

Yes, and it's one of the most popular things to do. The Blue Lagoon is only about 20 minutes from Keflavík Airport, so many travellers stop there with their luggage on arrival or before a flight home. Several tours bundle airport transfers with admission, and you can store luggage on-site. See our transfers page for the bus and private-car options.

It's genuinely spectacular — the silica-blue water against black lava is unlike anything else — but it is the busiest and most expensive lagoon, and it's a built-up spa rather than a wild hot spring. If the price or crowds put you off, the Sky Lagoon, Secret Lagoon or Mývatn Nature Baths deliver the same warm-water-in-cold-air magic for less.

Just a swimsuit — towels are included or available to rent at every lagoon on this site, and all have changing rooms, lockers and showers. Icelandic pool etiquette requires a thorough shower without a swimsuit before entering. Leave silver jewellery at home, as the mineral water can tarnish it, and bring a hair tie: the silica can leave long hair feeling dry.

Yes — all of Iceland's geothermal lagoons are open year-round, and winter is one of the best times to visit. The contrast of hot water and freezing air is at its most dramatic, and on a clear night you may even catch the northern lights while you soak.