There is no reception at Sompasauna, no price list, and nobody to check anyone in. The door is open, the stove is usually already lit, and when the wood runs low it is whoever happens to be standing there who fetches more.
The sauna is run by a volunteer association on the Helsinki shore and funded by donations. It holds a 4.8 rating from more than 1,300 Google reviews while offering less, in pure amenity terms, than almost any other sauna in the city.
That contradiction is the whole subject. Visitors who arrive expecting a spa write the harshest reviews in the set. Visitors who arrive expecting a fire with benches around it tend to write the warmest.
What are the saunas at Sompasauna like?
Three wood-heated cabins stand side by side at the current site, and reviewers distinguish between them consistently. One is described as the calm, temple-like room. One runs noticeably milder. The third — the most recent addition — is the one people write about afterwards.
That hottest cabin carries an indicator light that comes on when the temperature climbs, and reviewers advise newcomers to start elsewhere. Reported readings cluster between 90 and 100 °C, with figures as low as 80 and as high as 110. Not all three are always lit; several recent visitors found two in operation.
Cooling happens in the sea. Since the move the shoreline is a proper sandy beach, and the water is used through the winter as well as in summer. The short walk between stove and shoreline is the most mentioned feature in the whole corpus.
Sessions are mixed and clothing is optional. Many Finnish visitors sauna naked and swimwear is equally accepted; a striking number of reviews exist mainly to prepare newcomers for this rather than to complain about it. Photography is not done — the association asks visitors to leave cameras and phones alone, and reviewers pass the rule on.
At quiet hours visitors can split wood and feed the stove themselves. At busier times there is usually a regular already doing it, and newcomers describe being shown how rather than being left to guess.
There is also a stage, and someone is usually playing the piano.
What does Sompasauna not provide?
There is no running water. The sea is the only shower, before and after. Because people walk in straight off the sand, floors are frequently wet and gritty, and reviewers who care about rinsing before sitting on a shared bench return to this point repeatedly.
Reports on toilets contradict each other. Some visitors describe none at all, one describes a chemical toilet in poor condition, and another mentions public facilities on site. Anyone who needs certainty on this should plan around it.
Lockers exist, but they take a padlock the visitor brings. This is the practical tip repeated most often across the reviews, and the one most likely to matter on arrival. There are no changing facilities either.
Bring drinking water. Nobody sells any.
When is the best time to go?
Daytime visits draw the calmest descriptions, and Finnish regulars name daytime specifically as the way to avoid queuing.
Evenings are a different place. One visitor on a Wednesday in July found it heaving, with a five-to-ten minute wait for a bench. The surrounding area attracts drinking that some reviewers found intrusive and others counted as part of the atmosphere.
The sauna is open around the clock, all year. There is no closing time to thin the crowd and no opening hour to arrive early for, which is much of why one visit resembles the next so little.
The crowd itself is genuinely mixed — one Finnish visitor counted ages from five to seventy in a single afternoon.
How to find it
Sompasauna moved in 2025 and now sits at Kansanpuistonpolku 5 on Mustikkamaa, in Helsinki’s 00570 postal area. Directions published before the move point to Verkkosaari and lead to the wrong shoreline, and older guides are still in circulation.
Most reviewers who knew both sites call Mustikkamaa an improvement, citing the lockers, the changing space and the sand. One regular preferred the earlier Sompasaari location.
Directory details
Plan your visit
Sompasauna · Kansanpuistonpolku 5, 00570 Helsinki, Mustikkamaa. Open around the clock · Free, funded by donations · No booking · Bring a padlock. Use the live listing card and map on this page for the current rating, review count and route link.
Open the full sauna listingPractical answers
Frequently asked questions
Is Sompasauna free?
Yes. There is no entry charge. The sauna is run by a volunteer association and funded by donations, and reviewers regularly mention contributing on their way out.
Are there showers at Sompasauna?
No. There is no running water on site and no changing facilities. Visitors rinse in the sea before and after the sauna, which is the surprise first-time visitors report most often.
Does a visit need to be booked?
No. The sauna cannot be reserved and is open around the clock. The trade-off is queuing at peak times, reported most often on summer evenings.
Is nudity required?
No. The saunas are mixed and clothing is optional. Both naked and swimsuited visitors are described as common, and reviewers consistently say neither stands out.
Can visitors take photos at Sompasauna?
No. Photography is not done at the sauna. Amplified music is not allowed either, though acoustic playing and singing are.
Location
Find Sompasauna on the map
Check the location and open directions before you set out.