Iceland's natural hot springs & geothermal pools

A wild river you bathe in, not a pool. It's a 3–3.5 km hike (about an hour) up from Hveragerði, and the reward is a stretch of warm river where hot springs mix with cold snowmelt to sit around 36–40°C — walk further upstream and it gets hotter. Bring a swimsuit, water shoes and a towel; there's a boardwalk but no changing rooms.

The postcard wild spring near Flúðir: a small rock-walled pool that stays around 40°C year-round, next to a tiny turf-roofed hut that doubles as your changing room. It sits on private land — pay the honour-system fee (about 3,000 ISK) in the box by the hut, and go early, since the pool barely fits a handful of people.

About as intimate as a wild soak gets: a natural hot pot on the eastern edge of Snæfellsnes that fits maybe two people at a constant ~38°C. There's no sign at the road, so you'll need GPS coordinates to find it, and no facilities once you do — it's free, though owners of nearby land appreciate a small donation.

One of the few places where a warm waterfall pours straight over you into a natural pool, at a comfortable 38–40°C. It's deep in the East Iceland highlands past the Kárahnjúkar dam, so you need a proper 4WD for the rough F910 and it's summer-only (roughly June–September). Rarely crowded — you may well have it to yourself.

Eight geothermal pools built into the rock right at the shoreline of Hvalfjörður, about 45 minutes north of Reykjavík. Because they sit at the ocean's edge, the tide changes their temperature and even submerges some pools — expect roughly 35–42°C depending on the pool and the hour. There's a sauna, cold plunge and swim-up bar; pre-booking is required.

A 1954 pool and hot tub on a black pebble beach at the far end of the Strandir coast in the Westfjords, with the Atlantic breaking a few metres away. The water holds around 38–40°C, but getting there is the real story: it's a five-hour drive from Reykjavík over long gravel roads, open only from roughly mid-May to the end of August. Bring a 4WD and patience.

Iceland's oldest pool (Gamla Laugin, built in 1891), on the Golden Circle near Flúðir — the easiest step from wild to developed. It's a large natural pool held at 38–40°C year-round, ringed by a short path past steaming vents and Litli Geysir, a little geyser that erupts every few minutes. Simpler and more low-key than the big lagoons.

Iceland's most famous soak: a vast milky-blue lagoon in a black lava field, its colour from silica and other minerals, kept at 37–40°C. Slots are timed and sell out days or weeks ahead, so book well in advance. Tip: leave conditioner in your hair while you bathe — the silica leaves it stiff otherwise — and, as everywhere, shower naked before entering.

An oceanfront lagoon in Kópavogur, ten minutes from central Reykjavík, built around a 70-metre infinity edge that melts into the North Atlantic. The water sits at 38–40°C, and its signature is the seven-step Skjól ritual: warm lagoon, cold plunge, sauna, mist, scrub, steam and shower, in sequence. Book ahead — weekends and summer evenings fill up.

The one big lagoon set inside a forest — in Vaðlaskógur woods, minutes from Akureyri in the north, and the water comes from a hot spring struck during tunnel construction. Two pools sit at a gentle 37°C with swim-up bars, and there's a dry sauna plus an 11°C cold plunge for the brave. A softer, greener alternative to the lava-field lagoons.

The north's answer to the Blue Lagoon, near Lake Mývatn in an active volcanic zone. Its milky-blue lagoon runs 36–40°C, coloured by silica and alkaline minerals drawn from a borehole nearby, with the steaming slopes of Námafjall next door. Note: the site has been closed for renovation and is due to reopen (as Earth Lagoon) in early summer 2026 — check before you go.