Blue Lagoon

The Blue Lagoon began by accident: in the 1970s the Svartsengi geothermal power plant discharged mineral-rich water into the lava field, and locals noticed skin conditions improved after bathing in it. Today it is a purpose-built luxury spa on the Reykjanes peninsula, 20 minutes from Keflavik airport, with a lake of 37-39°C silica-blue water surrounded by black lava. It is the country's most photographed place and a rite of passage for first-time visitors, often used as the first or last stop of a trip because of the airport proximity. The water is not a natural spring: brine is drawn from around 2,000 metres below the Svartsengi field at well over 200°C, spun through turbines to make electricity and heat the peninsula's houses, then cooled in the lava basin, where silica settles as the chalky white sediment underfoot. The lagoon renews itself roughly every 40 hours, which is why no chlorine is added.

The Comfort ticket (ISK9990 low season, ISK14990 peak) includes entry, a silica mask, a drink and towel. Upgrade tiers add extra masks, a slipper set and a robe. Inside are the main lagoon, a swim-up bar, a steam cave, a sauna, an in-water waterfall and the Blue Cafe. LAVA restaurant serves fine dining lakeside and Moss Restaurant sits within the Retreat Hotel. Nearby is the Silica Hotel and the higher-end Retreat with private lagoons. Note that eruptions on Reykjanes have periodically forced brief closures since 2023; check status before travelling. The sequence once you arrive is fixed: wristband at the ridge-top entrance, gendered changing rooms with private cubicles, a compulsory naked shower with free conditioner on the wall, then a door straight into the steam. The hottest water sits near the inflow; the far corners drop to bath temperature. The bar caps you at three alcoholic drinks.

Book online at least a week ahead in summer, more for evenings, or you may not get in. The 5-7pm slot is the classic — steam turning gold at sunset — but morning slots after 8am are the calmest. Shuttle buses run every 90 minutes from BSI in Reykjavik (ISK5000 return). Pair with a Keflavik departure by leaving your suitcase at the spa's luggage store (ISK800). Rinse your hair thoroughly before entering; the minerals dry it out for days if you don't. Your slot is an entry time rather than a time limit — once you are through the turnstile you can stay until closing, though few people manage more than two hours in 38°C water. Allow 30 to 40 minutes at each end for changing, showering and drying, and aim to arrive inside the half-hour window printed on your booking.

Driving is the simplest way in. From Reykjavik take Route 41, Reykjanesbraut, southwest for about 47 km, then turn onto Route 43, Grindavikurvegur, which is signposted for the lagoon; the whole run takes 50 minutes in normal conditions. From Keflavik airport it is 23 km and roughly 20 minutes on the same pair of roads. Parking is free and large, with an overflow lot, and from the car park it is a five-minute walk along a corridor cut through the lava to the doors. Without a car, the Reykjavik Excursions shuttle from BSI terminal takes about 55 minutes and costs ISK5000 return, with airport departures timed to flights so you can be collected at the terminal. Straeto's route 55 runs the Reykjavik-Keflavik road but does not stop here. Book the shuttle when you book the ticket; seats sell out with the slots.

Costs stack up fast once you are inside. Comfort starts at ISK9990 off-peak and climbs towards ISK14990 for summer and sunset slots, covering entry, the silica mud mask, a towel and one drink from the swim-up bar — beer, wine, smoothie or soft drink. Premium at ISK14990 adds a bathrobe, slippers, a second mask and a table reservation at LAVA Restaurant with a glass of sparkling wine. Retreat Spa from ISK89000 buys the quiet Retreat Lagoon, the four-chamber Blue Lagoon Ritual and a private changing suite. Children aged 2-13 enter free with a paying adult; under-2s are not admitted at all. Luggage storage is ISK800 a bag, swimsuits and robes rent at the desk, and in-water massages are booked separately for well above the price of entry. Comfort is enough unless you plan to eat at LAVA.

Timing decides how the place feels. The airport transfer wave lands between 10:00 and 14:00 and the water fills with day-trippers and tour groups; the first slot of the day, 8:00 in summer and 9:00 in winter, is the calmest hour you will get. Things thin briefly around 15:00, then 17:00 to 19:00 becomes the golden-hour crush, and the final two hours before closing empty out again. By month, January and February are dark, cheapest at ISK9990, and the only window in which aurora might appear over the steam. June to August is peak pricing with 21:00 slots still bright under the midnight sun; book two to three weeks out. September and October strike the best balance. Christmas and New Year sell out first. Rain barely matters when you are neck-deep, but a hard Reykjanes wind makes the walk to the steam cave punishing.

It suits more people than its price suggests. The main lagoon averages about 1.2 metres deep with a soft silica floor, so non-swimmers and nervous bathers are fine; children 2-13 are free, and under-8s are given armbands at the desk, which they must wear. Wheelchair users are properly catered for, with accessible changing and a lift chair into the water — call ahead so staff are ready. Teenagers get about an hour out of it before boredom sets in. Anyone with dyed, bleached or long hair should condition and tie up, and silver jewellery should go in the locker, because the sulphur tarnishes it. Skip it entirely if you have a one-hour gap before a flight; changing, showering and drying alone eats 40 minutes. Skip it too if what you actually want is an undeveloped wild hot spring, because this is engineered.

Reykjanes gives you a half-day around it. The Bridge Between Continents on Route 425 towards Hafnir is about 15 minutes away, the Gunnuhver mud pots and the Reykjanesviti lighthouse 20 to 25 minutes, and the Brimketill lava rock pool roughly 12 minutes west along the same road. Reykjanesbaer and Keflavik, 20 minutes north, hold Vikingaheimar with the Islendingur ship replica and the Duus Museum on the harbour. Further east, 40 minutes out, the Seltun geothermal field at Krysuvik and the black lake Kleifarvatn make a longer loop. Grindavik town itself is not a visitor stop: it was evacuated in November 2023 and access has been restricted since, so do not build a lunch plan around it. Peninsula roads close at short notice during eruptions — check road.is and safetravel.is, and do the driving first, the lagoon last.

The honest caveats are worth hearing before you pay. This is the outflow of a working power station, and Svartsengi's pipework and steam plumes appear in every wide photograph you will take; the blue is silica scattering light, and the marketing images are pushed far past what your eyes see. The mask bar queues 10 to 15 minutes at peak. The water is opaque, so find the steps with your feet. The steam cave is small and fills quickly. There is no re-entry once you leave the building. Icelanders largely do not come — a municipal pool such as Laugardalslaug costs around ISK1300 with hot pots and a steam room — and if you are soaking several times on this trip, this is the one that most obviously feels like a product. Eruption closures since 2023 are real, sometimes announced the same morning.

Hours & entry

Not free

Daily 8:00-22:00 summer · Daily 9:00-21:00 winter · Last entry 2 hours before closing

What to see

• Silica mud mask station — In-water bar on the north side of the main lagoon
• Steam cave and sauna — Corridor between the changing rooms and the main lagoon
• In-lagoon waterfall — West end of the main lagoon under the wooden bridge

Tips from the ground

• Book the 8am slot for empty water and photos without other bathers
• Leave your bag at the luggage store on the way to Keflavik; the shuttle drops there
• Condition your hair heavily and tie it up; silica destroys it