Snorkeling in bubbling hot springs is usually impossible as the water is far too hot, but the hot springs at the bottom of Lake Kleifarvatn provide us with the opportunity to do just that!  Lake Kleifarvatn is hidden within a stunning volcanic landscape just 30 minutes outside of Reykjavík. Standing at the lake shore and changing into your dry suit, you will probably catch a whiff of the sulfur emitted from nearby hot springs and the total silence will let you forget that you are anywhere near civilization.

The underwater hot springs in lake Kleifarvatn have only recently been discovered and are about a 50 meter swim from the shore.  Upon entering the lake you can see the white and yellow sulfur deposits on the lake floor. When we swim closer, you’ll begin to sense the environent around you changing as you approach the gas emanating from below the lake’s floor.  We’ve heard this sensation described as similar to ‘snorkeling in a glass of Champagne’—the fact that you are snorkeling in a caldera is also impressive enough!

When back on land we will enjoy some refreshments at the shore before moving on to Seltún, a nearby high temperature geothermal area on land. In Seltún we will walk along the boiling mud pots and colorful sulfur deposits. We will then make our way back to Reykjavík.

We highly recommend that you bring your swimsuit with you as we can drop you off at one of Reykjavík’s local geothermal pools where you can relax in the hot tubs and end the day in traditional Icelandic fashion.

Tour Details


1. April – 30. September


Participants must:

  • Be at least 150cm tall
  • Be at least 45kg
  • Be at least 12 years of age
  • Be comfortable in water and be able to swim
  • Be physically fit
  • Be ready to wear a sometimes tight & constricting dry suit
  • Not be pregnant
  • All participants age 60 or older and all participants under a doctor’s care for any ongoing medical condition must have our medical form signed by their physician.

5 hours

Min / Max:

Minimum 2 snorkelers / Maximum of 6 snorkelers per snorkel guide

Please bring:
  • Long underwear
  • Thick socks
  • Suitable clothes for the weather of the day
  • Swimsuit (if you want to be dropped off at a pool after the tour)
  • Contact lenses if you wear glasses


  • Guided snorkelling trip in lake Kleifarvatn
  • All necessary snorkelling equipment
  • Hot vegan and gluten-free soup and light refreshments at the lake’s shore
  • Stop at geothermal area Seltún

10:00-10:30 hotel pick up in Reykjavík OR 11:00 meeting at Seltún Geothermal Area parking lot

Book this tour now!