Nauthólsvík, Reykjavík's geothermal beach, and how to do it right

Overview

Reykjavík sits on the North Atlantic, and the open sea along its shore is not something most visitors swim in. Nauthólsvík is the city’s answer to that: a man-made lagoon behind a seawall, opened in 2001, into which the city pipes its own geothermal water supply. The result is a beach in a sub-arctic capital that actually holds a swimmable temperature through the summer — a piece of civic engineering rather than a stretch of coastline that happened to be warm. It is run by the city council as a public facility, not a private attraction, and the charge follows the season rather than the facilities: free from 15 May to 18 August, about 895 ISK for adults outside those dates, and free for under-eighteens all year. Go expecting a heated municipal swimming spot with a beach around it, not a tropical cove — that honesty is the point of the place, and the reason it is worth the trip at all.

The sand and the water

The lagoon holds at roughly 15–19°C through the summer, a temperature the geothermal supply keeps stable regardless of what the unheated sea beyond the seawall is doing — and here that gap matters more than almost anywhere, since the open North Atlantic never gets anywhere near it. That makes Nauthólsvík water you can get into rather than water you brace against, sheltered from the sea’s swell by the wall itself — though fifteen degrees is still fifteen degrees, and the tubs are where people warm up afterwards. Inside the same enclosure sit separate hot tubs that run at about 39°C, and they keep running through the winter once the lagoon is no longer a summer swim — on the winter timetable rather than at any hour, which is a different thing from never closing. Do not come expecting scenery beyond the practical: this is an engineered bathing facility, sand and warmed water held inside a seawall, not a wild beach.

Getting there

Nauthólsvík is inside Reykjavík itself, not a day-trip destination. It sits on the shore below Öskjuhlíð, and the shore path out of the centre reaches it on foot in well under an hour — which is how most people who are not carrying much get there. The city bus network, Strætó, and a bicycle both reach it directly as well. No car is needed for it any more than for the rest of the centre.

Practicalities

Bring swimwear and a towel — and know before you arrive that you shower without swimwear, with soap, before going into the water. That is the rule at every bathing place in Iceland and it applies here; the changing rooms are heated and built for it. As a staffed council facility rather than open shoreline it keeps set hours, and they are worth checking against your day: 15 May to 18 August, daily 10:00–19:00; the rest of the year Tuesday to Friday 11:00–19:00 and Saturday 11:00–16:00, closed Sunday and Monday. That winter closure is the one that catches people out on a short trip. The appeal here is straightforward rather than scenic: a warm, genuinely safe swim in a city whose own sea offers nothing of the kind, used by Reykjavík’s own residents as much as by anyone visiting.