The 8 Best Public Saunas in Helsinki, by a Finn

There are around 3.3 million saunas in Finland for five and a half million people, which means the country has more saunas than cars. Sauna here is not a spa treatment and it is not a wellness trend. It is closer to a kitchen: an ordinary, daily, slightly sacred room that nearly every Finn grew up with, and one that UNESCO now lists as living heritage. If you do one thing in Helsinki that the city does better than almost anywhere on earth, do this.

The trouble is that nobody tells a visitor the two things they actually need to know: which sauna to go to, because the eight below are not interchangeable, and how to behave once you are inside, because there are a few unwritten rules and Finns are far too polite to correct you. So here is both, from someone who grew up doing it.

The short version: which one is for you

First, the etiquette (it is simpler than you fear)

Start here, because the fear is always worse than the reality, and the fear is almost always about being naked near strangers. In a Finnish public sauna nobody is looking at you, nobody cares, and the whole thing carries the emotional temperature of using a shared shower at a swimming pool. Once that lands, the rest is easy.

• Shower first, without a swimsuit. You wash before you sit, every single time. It is hygiene, not ceremony.
• Naked or swimsuit depends on the sauna, and it matters. At the traditional single-sex places (Kotiharju, Kulttuurisauna) everyone is naked, and a swimsuit is the thing that actually marks you as the tourist. At the mixed ones (Löyly, Allas, Löylykontti, Kuusijärvi) you wear one. If you are unsure, look at how the changing room is set up, or just ask: a Finn would far rather answer than watch you get it wrong.
• Always sit on something. A small towel or a paper seat cover, a pefletti, goes between you and the bench, always. You rarely need to bring one: anywhere you pay to get in there is usually a stack of one-use peflettis by the door, free or for a coin. Bare skin on shared wood is the one move that reads as genuinely rude.
• Löyly is the steam, and it belongs to the room. Throwing water on the hot stones is called heittää löylyä, and the sauna named Löyly is named after exactly this. Anyone can do it, but the heat that comes off lands on everyone, so in a full room add a ladle at a time rather than a bucket, and it is normal to glance around before you really crank it up.
• Read the room on noise. Kotiharju is chatty and social. Kulttuurisauna is close to silent. Neither is wrong, you just match whichever room you are in. Phones stay in the locker everywhere.
• Cool down between rounds. The rhythm is heat for ten or fifteen minutes, then out to a cold shower, the sea, or in winter a hole cut in the ice, an avanto, then back in. Two or three rounds is a normal visit. The cold plunge is not machismo, it is the entire point: the contrast is what your body is actually chasing.
• Hydrate, and do not rush. Water or a beer afterwards is standard at the relaxed places, less so at the quiet naked ones. A sauna is somewhere you leave when you are ready, not when a clock tells you to.

Löyly: the one to book, and the one to send a first-timer to

If you have never done this, start at Löyly. It is the architectural showpiece on the shore at Hernesaari, a low tumble of blond wood on the water that made most of the postcards, and behind the design it is a genuinely good sauna: wood-heated rooms, a traditional smoke sauna, and a ladder straight into the sea that you can use all year. It is mixed, so you wear a swimsuit, and towels and seat covers come with the ticket. It is the busiest and most tourist-facing of the eight, and it earns it: Time magazine put it on its list of the 100 greatest places in the world. Book ahead, they cap the numbers, and stay afterwards for the salmon soup: lohikeitto is one of the real highlights of Finnish cooking.

Go here if: it is your first time, you are with a group, you love design, or you want an evening that ends with dinner.

Kotiharju: the real old public sauna

For the opposite experience, go to Kotiharju, in Kallio. It has heated with wood since 1928 and it is the last public wood-burning sauna block left in the city. Nothing here is designed for you, and that is the appeal: gender-separated, everyone naked, no pool, just very good heat and the local ritual of stepping out onto the pavement in a towel to cool off in the open air between rounds. That is a normal Kallio street scene, and one of the most quietly Finnish things you will see all trip. One thing worth planning your day around: for fifteen euros a professional washer will scrub you down in a way you have almost certainly never experienced before. Thursdays and Saturdays only.

Go here if: you want the authentic, century-old, neighbourhood article over the showpiece.

Sompasauna: free, DIY, and the most Helsinki thing you can do

Then there is Sompasauna, which by rights should not exist and is better for it. On the shore at Kalasatama sits a cluster of saunas built and kept running entirely by volunteers, open around the clock, every day of the year, for free. There is no staff and no booking. You feed the stove yourself, you leave the place decent for the next person, and you drop straight into the Baltic to cool down. It is mixed and swimsuits are optional. Bring drinking water and a towel, because there is nothing to buy on site, and keep any drinking in proportion: the whole place runs on people not spoiling it for each other. It has packed up and moved before, so check sompasauna.fi before you set off.

Go here if: you want the real, free, slightly feral version. If you do one sauna you will still be talking about back home, do this one.

Kulttuurisauna: the quiet one

Kulttuurisauna, on the water at Merihaka, is the considered one: a small, minimalist wood-fired sauna designed by an architect and an artist, gender-separated, and nothing at all is worn inside the sauna. The changing rooms, showers and both saunas are split by sex, but the courtyard between them is shared, so bring a swimsuit for that and for the ladder down into the sea. Phones are discouraged and conversation stays low. People come here to sit in the heat and think, not to catch up. It is not a place for groups either, and they mean it strictly: more than two people counts as a group. Evening shifts run on advance booking only; the Friday-to-Sunday morning shifts you can simply walk into.

Go here if: you are drawn to design, and you want sauna as a quiet ritual rather than a night out.

Allas Pool: the easy central one

If you are short on time, travelling with family, or simply not ready to get naked among strangers, Allas is the low-stakes way in. It sits right on Market Square next to the big wheel: saunas plus a heated pool and a second pool at sea temperature, open year-round, swimsuit throughout. It was called Allas Sea Pool until recently, so both names are still in circulation. It is the least atmospheric of the eight and by far the easiest to just walk into, and a morning swim there alongside commuting locals is a lovely, undramatic first taste. It also has a second life in summer as a music venue: Allas Live runs gigs on the courtyard through the season, with its own tickets and its own door. The sauna and the pools are a separate thing entirely, but nothing stops you doing both on the same warm night.

Go here if: you want a gentle version, you are with kids, or you have an hour to fill in the centre.

Löylykontti Sörnäinen: a container, a door code, and the sea

The newest idea on this list is also the simplest: a sauna in a shipping container on the water, booked by the hour on your phone. Löylykontti’s Helsinki one sits on the Sörnäinen waterfront promenade and there is no staff at all. You pay online, a door code arrives by email, and you let yourself in. Shared shifts are mixed with a swimsuit on, or you can take the whole container privately for a group. Heated steps run down into the water every day of the year, which is the real draw: an avanto in the middle of the city, in January, without joining a club or booking a spa.

Go here if: you want a short, private, spontaneous sauna, or you want to try winter swimming with no ceremony attached.

Lonna: the one with a boat trip built in

Ten minutes out from Market Square on the little island of Lonna there are two wood-burning saunas, and the crossing is half the point: you are off the mainland, on the water, looking back at the city you came from. It is mixed, swimsuit up to you, and the sea is right there, though the shore is rocky enough that getting in takes some care. It runs Tuesday to Saturday and only through the summer season, so it is the one on this list you cannot improvise in February. Book the two-hour slot ahead, and check the last boat back before you settle in.

Go here if: you are here in summer and want the sauna to come with a small sea voyage.

Kuusijärvi: the smoke sauna worth leaving town for

One is worth a trip out of the city, and this is it. Kuusijärvi sits by a lake in Vantaa, about forty minutes from the centre on public transport, and it claims something no other public sauna does: traditional smoke saunas heated every single day of the year. A smoke sauna has no chimney. A fire heats the stones for hours, the smoke is let out before anyone goes in, and what is left is a soft, dark, faintly sooty heat that nothing electric comes close to. It is mixed and swimsuits are required, there is no booking, you buy a ticket at the café counter, and the lake is a few steps from the door.

Go here if: you want the oldest version of the tradition, and you have a spare half day.

When to go: winter, honestly

Sauna in Helsinki is a year-round thing, but it is best in winter. The colder it is outside, the more sense the whole ritual makes, and lowering yourself through a hole in the frozen sea is a genuinely clarifying way to spend a February afternoon. Dropping into the water at Allas, Sompasauna or Löylykontti is a completely normal thing to do from November onward, not a stunt. Summer has its own argument, and it is Lonna and Sompasauna at eleven at night with the light still up, but if you are choosing a season for this one thing, choose the cold one.

The honest limit of a guide like this

This is the free version, and it is a good one: the real places, the real rules, none of the wellness-brochure nonsense. What it cannot do is fit itself to your trip. Kotiharju is shut on Mondays and Kulttuurisauna at the start of the week, Lonna only runs in summer, Löylykontti and Löyly want booking, Kuusijärvi is forty minutes out, and Sompasauna occasionally folds up and moves. Whether the naked century-old block or the swimsuit showpiece is right for you depends entirely on who you are travelling with and what kind of evening you actually want, and slotting the right one into the right night, near where you already are, is the difference between a nice idea and a plan.

That is the part a local does for you. Start with five free local picks for Helsinki, see a real sample plan to get the idea, read our case for Helsinki if you still need convincing it is worth the trip, or when you are ready, we will build a weekend around you.

Do not overthink it. Wash, sit down, throw a little water on the stones, and when the heat gets to be too much, get up and step into the cold. That is the whole thing, and Helsinki does it better than anywhere on earth.

Prices and opening days were checked in September 2026. They move, so confirm before you travel.