Swimming at Copenhagen's harbour baths

Copenhagen lets you swim in its harbour, free, at three municipal harbour baths: Islands Brygge, Fisketorvet and Sluseholmen. All three are open from 06:00 to 22:00 every day of the year and have lifeguards from 1 June to 31 August between 10:00 and 18:00, read on the municipality's SvømKBH pages on 1 November 2026. It suits a summer day in the city, a family with confident swimmers, and the winter-bathing habit the city is known for. It does not suit a weak swimmer outside the lifeguard hours, or a day when the bathing-water forecast says no.

#What the municipality says

Islands Brygge, at Islands Brygge 14, is the original, opened on 15 July 2002. It has a 75 × 8 m lap pool 3 m deep, a 17 × 12 m diving pool 5 m deep with platforms at 1, 3 and 5 m, an 18 × 12 m play pool 1.2 m deep and a toddler pool 0.1–0.7 m. There are freshwater showers in summer and toilets on the quay; a winter-bathing club, Vinterbad Bryggen, is based there. Fisketorvet, at Kalvebod Brygge 55, has a 50 m pool, a diving pool and a children's pool; Sluseholmen, at Ben Websters Vej 69, has a lap pool, a diving bridge and two children's pools. All three list the same hours and lifeguard season.

The rules come from the city. Swimming in the harbour outside the designated bathing places is forbidden. The municipality publishes a daily bathing-water forecast with a three-day outlook, and adds its own test: if you cannot see your feet when standing knee-deep, do not swim, even under a green signal, because the cause may be a local bloom of toxic algae.

#The arithmetic

The swim itself is half an hour to two hours. Islands Brygge is 1,637 m from Copenhagen Central Station on OpenStreetMap footpaths, 21 minutes at 80 m a minute, and 1,845 m, 24 minutes, from Kongens Nytorv. With the walk both ways and changing time, a swim costs a city day about 90 minutes, and nothing else. On the Copenhagen or Oslo stopover it is a summer evening after day one's sights.

The computed figure: open 16 hours a day, 365 days a year, the baths are open 5,840 hours. The lifeguards cover 92 days × 8 hours, 736 hours: 12.6 % of the time they are open. In other words, the baths are always open and rarely supervised. Inside the lifeguard window, a family can use the shallow pools; outside it, everyone is on their own.

#What goes wrong

Water quality, first: the daily forecast can advise against bathing, and the city's knee-deep test applies whatever the signal. Temperature, second: this is the sea, and outside high summer it is cold; the municipality's pages give no water temperatures. Crowds, third: Islands Brygge on a hot weekend is full; Sluseholmen is further out and calmer. Unsupervised hours, fourth: from September to May there is no lifeguard at any hour.

#Alternatives in the city

For the harbour without getting wet, the canal boat from Nyhavn takes an hour from 80 kr. For an Iceland trip that starts or ends here, the habit translates: the Reykjavík pool morning is the geothermal version. The rest of a Copenhagen stay is on things to do in Copenhagen beyond a stopover.