Thermal baths in Helsinki
Helsinki spreads over a peninsula and a scatter of islands on the Gulf of Finland, with Tallinn across the water to the south. Its public saunas range from neighbourhood rooms with separate men's and women's sides to shore saunas where the cold dip is the sea, one of them on the island of Lonna, and a 1920s swimming hall where women and men swim on separate days.
- Baths9
- Water22 to 27°
- Hot rooms85 to 90°
- Free to enter1
Baths in Helsinki compared
Entry, swimwear rules, age limits and ticket type, side by side.
| Bath | Entry | Swimwear and rules | Age | Tickets |
|---|---|---|---|---|
| 1Allas Sea PoolHelsinki |
| Swimsuit made of swimwear fabric in the pools, public areas and mixed saunas; underwear and sports clothes don't count. Swimsuit optional in the separate women's and men's floating saunas. Shower without your swimsuit before the sauna and pools. | none stated | Day ticket |
| 2Kotiharjun SaunaHelsinki |
| Separate men's and women's saunas. | none stated | Day ticket |
| 3KulttuurisaunaHelsinki |
| Bring a swimsuit if you plan to swim in the sea. | none stated | Timed slots, book ahead |
| 4Lonna SaunaHelsinki | Closed for the winter until May 2027 | Every day is a mixed sauna day, both saunas open to all genders. Separate changing rooms for men and women plus a gender-neutral changing room; when booking you pick the men's or women's changing room. The operator says you can bathe 'with or without bathing suit'. | none stated | Timed slots, book ahead |
| 5LöylyHelsinki |
| Mixed saunas, separate changing rooms. Swimwear at all times; hire is 8 EUR for two hours. Under-18s come with a guardian. | none stated | Timed slots, book ahead |
| 6Sauna HermanniHelsinki |
| Separate saunas for men and women (30 places on the men's side, 20 on the women's). The operator publishes no swimwear rule. | none stated | Day ticket |
| 7SompasaunaHelsinki |
| Mixed, with no separate shifts. Clothing optional in the sauna and in the sea. | none stated | Day ticket |
| 8Uusi SaunaHelsinki |
| Separate wood-heated saunas for men and women; the electric sauna is mixed, and the operator's Russian-language text says a swimsuit or towel is required there. | none stated | Day ticket |
| 9Yrjönkatu Swimming HallHelsinki |
| Swim with or without a swimsuit; because nudity is allowed, women and men have separate days. Staff of both sexes work every day. The lobby and cash desk cannot be entered naked; photography is banned throughout. | none stated | Day ticket |
Every bath in Helsinki
Open all year unless the hours say otherwise.
Sinikka Halme, Wikimedia Commons · CC BY-SA1Allas Sea Pool
Bathhouse, Helsinki · No phones or cameras in the saunas. No alcohol in or near the saunas, changing rooms and pools.
Opened in 2016 on Katajanokka quay next to the Market Square, Allas has a heated 25 m outdoor pool at 27 °C and a sea water pool that isn't heated, so its temperature follows the sea.
Marit Henriksson, Wikimedia Commons · CC BY-SA2Kotiharjun Sauna
Bathhouse, Helsinki
Built in 1928, Kotiharju is the last public wood-heated sauna in Helsinki, according to the family who have run it since 1991.
Teemu, Wikimedia Commons · CC BY-SA3Kulttuurisauna
Bathhouse, Helsinki · No groups: more than two people count as a group, and first-time visitors are asked to come alone. Bring your own towel, seat towel and water bottle; no glass bottles or own alcohol.
A public sauna on the Hakaniemi shore, heated with wood in a single-fired mass stove and open all year, with a sea swim and a hole in the ice in winter.
4Lonna Sauna
Bathhouse, Helsinki · No private hire of the public sauna. Reservation strongly recommended; walk-in only if seats are free. Licensed area.
A log-built public sauna on Lonna, a 150-metre island between Helsinki's Market Square and Suomenlinna, designed by OOPEAA and opened in 2017.
Closeduntil May 2027
Ximonic (Simo Räsänen), Wikimedia Commons · CC BY-SA5Löyly
Bathhouse, Helsinki
A public sauna on the Hernesaari shore in Helsinki, wrapped in about 4,000 cut pine planks, with a smoke sauna and a wood-burning sauna that both open onto the sea.
6Sauna Hermanni
Bathhouse, Helsinki · No advance booking, drop in only. Card or cash at the kiosk.
A public sauna founded in the 1950s in the Hermanni district of Helsinki, which the operator counts as one of the two remaining old public saunas in the city.
Olimar, Wikimedia Commons · CC BY-SA7Sompasauna
Bathhouse, Helsinki · No running water or showers
A free sauna on the Helsinki shore, run by volunteers and open around the clock with no staff: you heat it yourself.
FreeAs of Sep 2026
JIP, Wikimedia Commons · CC BY-SA8Uusi Sauna
Bathhouse, Helsinki · Larger groups are asked to check space in advance by email or phone.
A public sauna and bistro in Jätkäsaari that updates the old Helsinki neighbourhood sauna, with separate wood-heated saunas for men and women that seat about twenty each.
Cecil, Wikimedia Commons · CC BY-SA9Yrjönkatu Swimming Hall
Bathhouse, Helsinki · Two-hour visit limit including washing and dressing. The 2nd floor holds 40 at a time; two thirds of its tickets are sold online ahead for a set date and time, the rest at the desk. The wood-heated sauna is temporarily out of use.
The City of Helsinki calls it Finland's first public swimming hall.
Nothing here for that filter.
Questions about Helsinki
Is Lonna Sauna in Helsinki open in winter?
No, Lonna is closed for the winter. In season you reach it on the FRS Finland waterbus from the Keisarinluodonlaituri pier at Market Square, about 10 minutes, and private boats can't land on the island. Booking is strongly recommended; walk-ins get in only when seats are free.
Can you just turn up at a sauna in Helsinki?
Yes, at Sauna Hermanni, which takes no advance bookings: you drop in and pay at the kiosk, by card or cash. The entrance is in the courtyard of the apartment block at Hämeentie 63, and trams 6 and 8 stop at Hauhonpuisto.
Can you swim in the sea after a sauna in Helsinki?
Yes, at several. At Lonna you dip straight off the rocks, where the stones shift with passing ships, so the operator recommends footwear. Allas has a sea water pool that isn't heated and follows the sea's temperature, and at Sompasauna bathers go into the sea with or without clothes.
Can children go to Allas Sea Pool in Helsinki?
Yes, with a guardian who supervises them at all times. Children who can't swim have to stay within arm's reach of that guardian.
Can you swim naked at Yrjönkatu Swimming Hall in Helsinki?
Yes, swimsuits are optional, which is why women and men have separate days. From age 7 children follow the women's or men's days by sex, and only swimmers may use the pool. The lobby and cash desk can't be entered naked, and photography is banned throughout.