Inside Reykjaböð : Iceland’s New Hot Spring Retreat in Reykjadalur Valley
Reykjaböð sits at the mouth of Reykjadalur Valley, around 30 minutes from Reykjavík and 15 from Selfoss. Reykjadalur is one of Iceland’s most active geothermal valleys, the kind of place where steam rises out of hillsides. The valley is already known for its naturally heated river, reached by a hike into the hills. eykjaböð takes that same geothermal resource and makes it considerably easier to experience.
The result is a more considered interpretation of the landscape, with nearly 900 square metres of warm, mineral-rich water, a large open-air lagoon, a purpose-built Bathhouse, Nordic bathing rituals and a restaurant that nods to Hveragerði’s long history of geothermal greenhouses. Reykjaböð sits on the Golden Circle route and on the road toward the South Coast, which makes it a natural pause rather than a detour requiring its own dedicated day.
Water Forms The Heart Of Reykjaböð
Nearly 900 square metres of geothermal water form the heart of Reykjaböð. The lagoon sits at around 38°C, with temperatures ranging from 37 to 40°C depending on the area, and is deliberately shallow enough to wander through rather than swim laps. The water comes directly from the geothermal ground beneath the site, is continuously renewed and is neither chlorinated nor chemically treated. Natural sulphur and silica are part of its composition.
A swim-up bar sits within the lagoon, sheltered from the elements, while around the water is an outdoor ritual area built around the Nordic habit of moving between heat and cold. There are two cold plunges, one at 8–12°C for beginners and another at 4–7°C for more experienced cold bathers, alongside open-air showers, a Kneipp pool and an event sauna heated to 80–95°C.
What To Expect At Reykjaböð
The experience starts at the changing rooms, where a wristband and towel are handed over before you step straight into the mineral-rich geothermal water. The natural place to begin is the lagoon, warm enough to settle into almost immediately, before working through the outdoor circuit: the event sauna, cold plunges and Kneipp walk, where hot and cold water provide the physical reset that makes Icelandic bathing so satisfying.
There is no need to treat the circuit as a test of endurance. Spend time in the lagoon, move between the thermal spaces, then return to the water when the cold has done its work. The in-water bar means you can order a drink without breaking the spell, and there is shelter when the weather turns, as it inevitably does in Iceland.
Once the water has done its job, Réttir Restaurant is the natural next stop, serving seasonal dishes and drinks built around Icelandic ingredients. In summer, the lagoon stretches into the long Icelandic evening; in winter, the contrast is sharper, with warm water, cold air and, on a clear night, stars or the Northern Lights overhead.
Then There Is The Bathhouse
For a deeper dive into the bathing ritual, the Bathhouse adds ten sensory spaces, drawing on Icelandic and Nordic traditions alongside Japanese onsen culture. It is deliberately intimate, with around 50 guests at a time, and access is reserved for adults aged 18 and over.
This is where the temperatures become more extreme. The Snow Room sits at -10 to -12°C, while the Herbal Pool is maintained at 37–41°C and the Infusion Sauna reaches 70–85°C. There is a steam bath running at 40–50°C with humidity of 90–100 per cent, a 10–12°C cold plunge and Experience Showers that move through 36, 28 and 20°C.
The Float Pool, at 36–38°C, is used for guided floating therapy, while the Fire Pit provides heated benches beside an open fire, a quieter place to pause between the more invigorating stages. There is also a body scrub made with sugar, Icelandic crowberry peel, volcanic sand and crushed olive kernels, alongside massage, facial, body and water-based treatments.
The difference from the outdoor experience is one of pace. Rather than moving between a few large bathing areas, the Bathhouse encourages you to work your way through a series of smaller spaces, lingering where the temperature, treatment or mood suits.
Tips for First-Time Visitors At Reykjaböð
Book the Bathhouse if you want the full experience: The Hot Springs Pass covers the lagoon and outdoor ritual area, while the Hot Springs & Bathhouse Spa Pass adds the ten indoor spaces, robe, slippers and a drink at the in-water bar.
Take the Nordic Journey as a guide, not a rule: Reykjaböð suggests two to four minutes on the Kneipp walk, eight to twelve in the event sauna, 30 to 90 seconds in the cold plunge and five to ten minutes back in the lagoon, repeating the sequence two or three times. The site is equally clear that you should move at your own pace and listen to your body.
Start with the gentler cold plunge: The 8–12°C pool is intended for beginners; the 4–7°C option is for experienced cold bathers. If that sounds ambitious, the open-air showers offer a less abrupt introduction to the cold.
Give yourself time: With the lagoon, thermal circuit, Bathhouse, swim-up bar and Réttir Restaurant all on site, Reykjaböð makes more sense as a few-hour stop than something to squeeze between two attractions.
Know the difference between Reykjaböð and Reykjadalur’s river: The natural hot river sits further into the valley and is reached on foot. Reykjaböð brings geothermal bathing to the mouth of the valley, with changing rooms, showers, thermal rituals, food and somewhere to retreat when the weather turns.
Choose your season accordingly: Summer brings long evenings and open-sky bathing; winter brings the sharper contrast of warm geothermal water and cold mountain air, with stars and, when conditions allow, the Northern Lights overhead.
Pre-book rather than chance it: Reykjaböð recommends booking ahead to secure your preferred time, particularly during busy periods, although tickets may be available on arrival.
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