Swim among geothermal vents on the Reykjanes Peninsula: a guided snorkeling tour that pairs a walk through Seltún’s boiling mud pots with a dry-suit snorkel near Kleifarvatn. Expect warm pockets, mineral formations and hot chocolate afterward.
More ways to explore the area's outdoor wonders
You start on cool earth beside Seltún, steam coiling like a living thing from boiling mud pots as gulls wheel above. The guide outlines the route through the boardwalks, then you drive a short self-guided leg to Kleifarvatn where the lake’s surface hides a strange, effervescent world below.
Difficulty
moderate
Duration
2 hours
Fitness Level
Moderate — able to walk short uneven trails and swim comfortably while wearing a dry suit
Wildlife
History
The Reykjanes Peninsula records repeated volcanic and geothermal episodes; local settlements have long used geothermal heat for bathing and industry.
Conservation
The area is fragile—stick to marked paths around thermal features and follow guide instructions to avoid damaging heat-altered ground and vegetation.
Reserve your spot on the Hot Spring Snorkeling Tour in Iceland today and enjoy a trusted, highly rated experience designed to help you make the most of your adventure.
Bring wool base layers
Wear long thermal underwear and thick wool socks under the dry suit to retain heat during the snorkel and after exiting the water.
Know the medical rules
Provide height, weight, age and complete the operator’s medical form before arrival; over-60s need a doctor’s sign-off.
Reserve a warm vehicle
Plan to drive yourself between Seltún and Kleifarvatn and have a heated car or warm shelter ready after the swim.
Practice basic snorkeling
Be comfortable with mask clearing and breathing through a snorkel in confined sessions; guides will brief but basic competence speeds the experience.
Dry suit (provided)
Keeps you insulated and dry in near-freezing surface temperatures while allowing underwater observation.
Thermal base layers
Wool or synthetic layers beneath the dry suit retain body heat and wick moisture.
Warm change of clothes & towel
Essential for comfort after the snorkel—dry shoes, insulated jacket and hat recommended.
Waterproof bag
Keeps personal items dry during transit and while gearing up at the lakeshore.