Iceland's Geothermal Areas & Hot Springs

Last updated: 2026-09-06 · TATS Man

First rule: geothermal does not mean bathable

Iceland’s volcanic setting puts hot water, steam, mud pots, mineral crusts and fumaroles all over the map. It is tempting to lump them together as "hot springs", but that creates bad travel advice.

Some places are geothermal landscapes for looking, where water or mud can be at or above boiling temperature. Others are managed or designated bathing places where soaking is the point. The Environment Agency’s traveller-safety guidance is straightforward: geothermal water or mud can be above boiling point, so visitors should follow instructions and stay on designated paths.

That is the rule I would carry everywhere: never test geothermal water with a hand or foot unless the place is explicitly managed or designated for bathing.

Hverir / Námafjall: the raw-looking North Iceland classic

Near Lake Mývatn, Hverir is one of the easiest places to see the visual vocabulary of a high-temperature geothermal field: steaming vents, bubbling mud and mineral-stained ground with very little vegetation.

This is a look, photograph and smell-the-sulphur stop, not a bathing stop. Conditions around active vents can change, so stay on the marked visitor routes and respect barriers or closures rather than following footprints onto bare ground.

Hverir fits naturally into a North Iceland itinerary with Mývatn, Krafla and the surrounding volcanic landscape. I would not cross the country solely for one mud pot, but as part of the region it makes geological sense.

Geysir: famous, protected and absolutely not a swimming pool

The Geysir geothermal area on the Golden Circle is a protected geothermal site. The Environment Agency prohibits bathing in its hot springs and requires visitors to use marked walkways in the hot-spring area.

That matters because one of the least useful instincts in Iceland is assuming that warm-looking water is an invitation. At Geysir, the attraction is the active geothermal system and erupting Strokkur — enjoy it from the legal visitor paths.

Pair it with our Golden Circle guide rather than treating it as a standalone spa stop.

Gunnuhver: powerful steam on a volcanically active peninsula

Gunnuhver on Reykjanes has viewing ramps overlooking active mud pools and steam vents. Visit Reykjanes places it near road 425 by the Reykjanes lighthouse in the UNESCO Global Geopark.

Reykjanes is also a region where volcanic activity has repeatedly changed road access and closures in recent years. So this is one of the places where I would check current road and SafeTravel information on the day, not assume last month’s driving route is still the sensible one.

Stay on the platforms and paths. Steam can look soft and photogenic; the ground underneath it is not obliged to be stable.

Hveravellir: geothermal landscape plus a designated pool

Hveravellir on the Kjölur highland route is a useful example of why categories matter. The protected area contains a high-temperature geothermal landscape, but it also has a bathing pool fed by spillwater from the geothermal area.

The Environment Agency says road 35 toward Hveravellir is normally passable for most cars in summer once the mountain road opens, with rivers bridged or culverted. Accommodation and camping operate seasonally around highland road access.

So Hveravellir can give you both viewing and soaking — but only use the actual designated bathing pool. Do not translate "there is a hot pool here" into permission to enter every colourful spring nearby.

Kerlingarfjöll and Hveradalir: hiking through serious geothermal terrain

Kerlingarfjöll contains one of Iceland’s powerful high-temperature geothermal areas, with fumaroles, mud pots and vividly altered ground. The Environment Agency notes that geothermal features can change rapidly: vents can appear, disappear or alter activity.

This is hiking country, not a casual dip. Good footwear, weather preparation and strict path discipline matter because you are combining mountain terrain with active geothermal ground.

I would treat Kerlingarfjöll as a highland objective in its own right rather than a substitute "hot spring" on a spa list.

Deildartunguhver: see the heat being used

In West Iceland, Deildartunguhver is interesting because it connects geothermal nature with everyday Icelandic infrastructure. Its hot water is used in district heating, turning what might otherwise be a quick steaming roadside stop into a useful example of how geothermal energy supports communities.

It pairs well with Borgarfjörður sights and a West Iceland route. Again, this is not water to test for bathing temperature.

Hrunalaug: the old "free unmanaged spring" advice is obsolete

The previous version of this guide described Hrunalaug as free, informal and basically unmanaged. That is no longer accurate.

Hrunalaug’s own current site shows a paid, operated bathing facility, with staff oversight, capacity limits, opening rules and a new changing facility that opened in 2026 with lockers, toilets and showers. The operator says there is not yet a standard booking system for ordinary visits and asks guests to be patient if maximum capacity is reached.

That does not make Hrunalaug a giant lagoon complex — it is still small and nature-focused — but visitors should arrive expecting a managed attraction, not a secret free pool with no facilities.

Bathing etiquette is part of the experience

For a designated pool or hot spring, follow the local rules rather than importing your own spa habits. In natural settings that usually means:

• no glass;
• no soap or shampoo in natural pools unless facilities specifically provide it elsewhere;
• keep noise and group size reasonable;
• never step off paths to create your own "private" pool;
• use changing/toilet facilities properly;
• respect closures even if the water is physically reachable.

At Landmannalaugar, for example, FÍ specifically asks bathers to use the wooden path across boggy ground and prohibits soap and glass in the natural brook. Protection rules are not decoration — they are part of keeping these places usable.

Which geothermal stop fits which route?

My rough decision tree would be:

• Golden Circle: Geysir for geothermal spectacle; a managed bathing stop separately if you want to soak.
• North Iceland / Mývatn: Hverir for raw geothermal landscape.
• Reykjanes: Gunnuhver when current access allows.
• Kjölur highlands: Hveravellir for geothermal landscape plus a designated pool.
• Kerlingarfjöll: Hveradalir for a more committing geothermal hike.
• South / Golden Circle detour: Hrunalaug for a small managed soak.

The better itinerary is usually to choose geothermal stops that already fit your route, rather than collecting fumaroles like Pokémon.

Final safety check

If you remember only one thing, make it this: colourful ground can be thin ground. Boiling water can sit just below the surface, and a harmless-looking crust is not a footpath.

Stay where the site tells you to stay, check current closures in volcanically active regions, and reserve your swimming for water that is explicitly meant for people.

Cheers, Carpe Diem & keep the geothermal cooking under the ground! 🍻⏳♨️
TATS Man
Your steam-admiring, path-respecting Iceland geothermal cyborg.

Official sources I checked

• Environment Agency of Iceland — traveller safety
• Environment Agency of Iceland — Geysir protected area
• Visit Reykjanes — Gunnuhver
• Environment Agency of Iceland — Hveravellir access and services
• Hrunalaug — current visitor information