Saunas in Helsinki: The Best Public Saunas and How They Work

Why Helsinki is the place to try a public sauna

Finland has roughly 5.5 million people and more than 3 million saunas, and Helsinki packs every kind of them into a compact city: rooftop and waterfront rooms, wood-heated neighbourhood baths, floating rafts and an island sauna reached by ferry. That density makes the city a good place to learn the rhythm rather than treat a sauna as a one-off spa add-on.

The rhythm is simple and repeatable: heat for a while, cool off in water or outdoors, sit quietly, then go back in for another round. Finns usually keep each round short, and the cooling step matters as much as the heat, which is why so many Helsinki saunas sit directly beside the sea.

Rules about clothing vary by venue rather than by city. Löyly is co-ed and requires a swimsuit, Kotiharju is a nude neighbourhood sauna where people cool off outside in their towels, and Lonna lets guests choose. Reading the venue before you go saves an awkward moment at the door.

The best saunas in Helsinki at a glance

For a first visit with the sea at the door, choose Löyly or Allas Sea Pool. For tradition and low prices, Kotiharju, Sauna Hermanni and Uusi Sauna are the neighbourhood picks, with Kotiharju in Kallio and Uusi Sauna in the newer Jätkäsaari district beside a restaurant.

For something scenic, Lonna needs a short ferry ride and Furuvik sits by a sandy beach a little further out, while Sauna Raft Hiisi floats in Töölö and, in summer, cruises the archipelago under a wood-burning stove. Culture Sauna in Merihaka is the minimalist option, and Sompasauna is the free, staffless one on the shore.

If you have time for only one session, Löyly gives the fullest picture: sauna, restaurant, outdoor seating and cold seawater in one building. If you have an evening and a towel, Kotiharju gets closer to how Helsinki residents actually bathe.

Löyly: the waterfront sauna with a Baltic dip

Löyly sits on Helsinki's southern waterfront in a striking timber building, with saunas, a restaurant and a large outdoor deck facing the Baltic Sea. The sauna is co-ed and you wear a bathing suit, and dressing rooms are separated by gender, so pack accordingly.

Sessions run as bookable two-hour slots, and towels, lockers and a seat cloth are part of the setup rather than extras. One traveller's account puts a two-hour slot at around 24 to 25 euros depending on day and time, while a Finnair round-up lists 29 euros; treat the venue's own booking page as the figure that applies to your date.

The trade-off is popularity: the good slots go early, particularly in summer and around weekends, so a same-day walk-in is a gamble. Book the time you want and arrive with room to spare, then use the deck between rounds for the cold dip.

Allas Sea Pool: sea pools and five saunas by Market Square

Allas Sea Pool occupies a prime spot next to Market Square, with outdoor pools, a seawater pool and five saunas split between separate men's and women's rooms and shared rooms with views towards the archipelago. A warm-water pool stays open through the year, and in summer one pool is set aside for children.

The published admission range is 14 to 24 euros depending on the ticket and season, and another traveller's account gives 18 to 22 euros, so the price you pay depends on what you book. Towels and swimwear are on you, and the poolside chairs make this the easiest venue for a mixed group with different tolerances for heat.

Because it is steps from the market and the harbour, Allas fits neatly between sightseeing stops rather than requiring a dedicated trip. In summer the venue also hosts live music and runs several restaurants, which makes it busier and noisier than the neighbourhood saunas.

Kotiharju Sauna: Helsinki's oldest wood-heated neighbourhood sauna

Kotiharju has been heating up since 1928 in Kallio, and it is the oldest surviving public sauna of its kind in the city, built when few flats had their own bathrooms. The stove is wood-fired, the heat is softer than an electric room, and the atmosphere is closer to a local ritual than a spa.

Bathing is nude in single-sex rooms, and between rounds people cool off with a cold shower or step outside in their towels, even in winter, often with a beer or water. Admission is listed at 16 euros, and there are no lockers, so belongings go behind the front desk or in the changing area.

Bring two towels, flip-flops and a bottle of water, and expect a modest, ageing building rather than polished changing rooms. That is the point, but it makes Kotiharju a poor fit for anyone who wants privacy or a swim.

Sauna Hermanni: a 1953 neighbourhood sauna east of Kallio

Sauna Hermanni has operated since 1953, a little east of Kallio, and it keeps the traditional neighbourhood format: locals, a cosy and slightly quirky interior, and a straightforward sauna session. Admission is cheap by Helsinki standards, the lowest-priced paid option in the city apart from the free shore sauna.

Refreshments and snacks are available on site and you can bring your own, and the sauna can be booked for private events, which occasionally takes it out of public use. There is no sea at the door here, so cooling is by shower between rounds.

Uusi Sauna: the modern neighbourhood sauna in Jätkäsaari

Uusi Sauna brings the neighbourhood model into the new Jätkäsaari district, with wood-pellet heated saunas for men and women and a restaurant on site. Admission is mid-range for the city, which buys the same unhurried, local style of session as the older rooms but in a newer building.

It works well if you are staying in the western harbour area or arriving by tram, and it is easier to combine with a meal than Kotiharju or Hermanni. The trade-off is that it lacks the waterfront dip, so the cold part of the ritual is a shower rather than the Baltic.

Culture Sauna: minimalist sauna in Merihaka

Kulttuurisauna in Merihaka takes the Finnish sauna into a calm, minimalist building with a Japanese influence, built around a wood-pellet stove. Admission is mid-range and modest, and the sea is right there for cooling off between rounds, which is rare for a room this quiet.

This is the venue to choose when you want a contemplative session rather than a social one: the rooms are small, the atmosphere is reserved, and conversation stays low. Its size means it can fill quickly, so plan around a session rather than drifting in mid-afternoon.

Lonna: the island sauna a short ferry ride from the city

Lonna's public sauna sits on a small island in the archipelago just in front of the city centre, reached by a short ferry ride, and the whole island opens from May to September. The sauna runs Tuesday to Saturday, with two loft rooms heated by wood-burning stoves and staggered hourly start times giving 12 seats per side.

Every day is mixed, both saunas are shared by all genders, changing rooms are separate by gender, and a gender-neutral changing room is available on site. Guests can bathe with or without a swimsuit, and the sauna pass covers two hours in total.

The sauna fee is 23 euros per guest, including soap, shampoo and a seat cover, with towel rental at 9 euros; booking ahead is strongly recommended and guests should arrive before their slot, because reception opens only fifteen minutes before the first start.

The cold dip is the honest catch: the sea entry is a rocky, shifting path rather than a beach, next to shipping traffic, so bring footwear you can walk into the water in. The building is all untreated timber and the terrace looks over the archipelago, with a bar for drinks and a restaurant on the island.

Furuvik Sauna Villa: a quiet seaside sauna with mixed and women-only days

Furuvik Sauna Villa sits further from the centre beside a sandy beach, and its public sauna hours run in an old seaside room that holds up to 12 people at a time. The venue publishes a calendar: some days are mixed and some are women-only, so the day you choose changes who you share the room with.

Admission is modest by regional standards, and the draw is the quiet: a small room, a beach for cooling off, and the option of winter swimming for anyone who wants a colder shock than the Baltic in summer. The distance from the centre is the trade-off, so treat it as a half-day rather than a stop.

Sauna Raft Hiisi: the floating sauna in Töölö

Sauna Raft Hiisi is a floating sauna of charred wood in Töölö, with a rooftop terrace, sea views and electric sessions in winter while it stays docked. In summer it sets off on anchor cruises through the Helsinki archipelago, powered by a wood-burning stove, with a barbecue on board.

Admission is modest, which makes it one of the cheaper ways to combine heat with open water in the centre. The trade-off is scheduling: the cruises depend on the season, and a docked winter session is a different, calmer experience from a summer run.

Sompasauna: the free, community-run sauna by the sea

Sompasauna has three saunas beside the Baltic Sea, open around the clock and free of charge, run by a community association rather than staff. Users fetch their own water and heat the stove, the rooms are mixed, and bathing is optional, so it asks more of you than any paid venue in the city.

There are lockers if you bring your own padlock, and the sea is the cooling option right outside. The trade-offs are real: it sits further from the centre than Löyly or Allas and is harder to reach, it has no staff to sort out problems, and upkeep depends on the people using it.

How a Helsinki sauna session works: booking, nudity, towels and cold water

Reservation models split into three groups. Löyly sells two-hour slots you book in advance, Lonna runs hourly starts with 12 seats per side and a two-hour pass, and the neighbourhood rooms such as Kotiharju, Hermanni and Sompasauna are walk-in; Allas Sea Pool sells admission to the pools and saunas rather than timed sauna slots.

Clothing rules vary venue by venue. Löyly is mixed and swimsuits are required, Lonna is mixed and swimwear is optional with separate changing rooms, and Kotiharju keeps the older Finnish convention of nude single-sex bathing. Showers come before the sauna, and you sit on a towel or the seat cloth provided.

Bring a towel, flip-flops, a water bottle and a swimsuit even if you may not need it; several venues rent towels, and bringing your own is cheaper. Cold water is usually the sea, with Lonna and Sompasauna both dropping straight into the Baltic and Kotiharju cooling people outdoors in towels even in winter.

Aim for short rounds rather than endurance: 5 to 15 minutes in the heat, then cooling and a rest before going back. Ask before throwing water on the stones if you are new to it, and remember that the upper benches and seats near the stove are the hottest.

Prices and how to choose between them

Prices range widely, and where two sources disagree, plan on the higher figure. Löyly is quoted at either 24 to 25 euros or 29 euros for a two-hour slot, Allas Sea Pool at 14 to 24 euros or 18 to 22 euros, and Lonna at 23 euros plus 9 euros if you rent a towel.

The neighbourhood rooms are the budget option: Kotiharju, Sauna Hermanni, Culture Sauna, Uusi Sauna, Furuvik and Sauna Raft Hiisi all charge modest, mid-range prices, with Sompasauna free. For a first-timer, Löyly or Allas is the gentlest introduction; for tradition, Kotiharju; for a group with mixed tastes, Allas.

If you are travelling onward in Finland, the saunas in Tampere make a natural second stop, with a lake-and-city mix that differs from Helsinki's seafront rooms. If you are heading across the Gulf instead, our Tallinn sauna guide covers the best saunas in Tallinn, where the bathing tradition leans on bathhouses rather than seafront rooms. Heading west rather than east, the best saunas in Stockholm cover the same choice between public rooms, floating saunas and lakeside dips. Within Helsinki, the Yrjönkatu Swimming Hall is the other classic public bathing option when you want a pool rather than a sea dip.

Getting around: ferries, trams and the walk to the water

Most of the city's saunas sit within reach of the centre on foot or by tram. Löyly and Allas Sea Pool are close to Market Square and the harbour, Kotiharju is in Kallio, Uusi Sauna in Jätkäsaari, Culture Sauna in Merihaka and Sauna Raft Hiisi in Töölö.

Lonna is the exception and needs a short ferry crossing to the island; check the sailing times when you book your sauna pass, since the pass covers a fixed two hours. Furuvik and Sompasauna are further out again, so budget a longer walk or a ride for either.

The walk to the water is part of the route. Lonna's sea entry is rocky and uneven, and Kotiharju's cooling happens outside in the open, so footwear and a towel you can carry matter more than they would in a spa.

Sauna etiquette in brief

Shower before you enter, sit on a towel or seat cloth, and keep the room calm: Lonna explicitly asks guests to keep conversation low and the atmosphere peaceful. Throw water on the stones only if those around you expect it, and leave the door closed behind you.

Follow the venue's clothing rule rather than your own default, use the changing room you are assigned, and do not reserve a place in the sauna with your towel while you are elsewhere. In mixed rooms, keep your gaze and your conversation neutral.

Drink water before and between rounds, skip alcohol before bathing, and leave the room if you feel unwell. Anyone with a heart condition or who is pregnant should ask a doctor before using a sauna or cold plunge.

Plan Your Visit

Build your Helsinki sauna day around one reserved session and one walk-in. Book Löyly or Lonna for the timed slot, then add Kotiharju or Sompasauna for the older, rougher version, and leave a gap between them rather than stacking sessions back to back.

Pack a towel, flip-flops, a water bottle and a swimsuit, and choose footwear you can walk into the sea in if you plan an island or shore dip. In winter, keep the outdoor cooling short and carry a warm layer for the walk between the sauna and the water. For the practical details, see the Finnish sauna.