It all started when a couple guys found a discarded sauna stove in the woods outside Helsinki. They reclaimed the stove, brought it to an urban industrial location by the shores of the Baltic and built a sauna around it.
There were no rules.
Wait, there is one rule: “Don’t be stupid” which was hand painted on the outside wall of the sauna.
The sauna is available 24/7. Folks are asked to bring their own firewood and clean water. (no salty Baltic water on the stove, please: rust).
Below is January 2018 article copied and pasted without permission from Nordic Business Insider.
Since the article, the Sompasauna suffered a fire at the hands of an arsonist on April 21, 2018. The coolest part of the misfortune is that the sauna was rebuilt by volunteers, reportedly, within 24 hours, probably while the ashes were still smoldering.
Info here, regarding the fire. What deserves note is that police and firefighters were dispatched. They put out the fire and investigated, calling the fire a deliberate act of arson (not from the sauna stove). But at no time were there any governmental schenanigans about trying to shut down the possibility of a future rebuild, nor was there any efforts to issue citations to the crew that originally built the sauna. In other words: sauna sanctity.
And please click through to this article on estoniasaunas.com, for an awesome write up, including detailed photos of Sompasauna. Priceless photos actually as they capture the spirit of the original sauna before the fire, including:

Editors notes below.
Sompasauna may be Finland’s original ‘guerrilla sauna’ – a perfect example of the prevailing spirit of citizen activism and do-it-yourself attitude
Sompasauna is arguably the first ‘guerrilla sauna’ in Finland – a makeshift sauna for all to enjoy, run by a community of volunteers. Guerrilla saunas are beginning to pop up all over. However, as Sompasauna’s Jaakko Keso points out, “This is part of a bigger cultural phenomenon which includes also Siivouspäiva and Ravintolapaivää.”
- Joha Grönvall
Citizen activism with a do-it-yourself spirit is a growing movement in Finland.
Sompasauna is part of a growing Finnish movement for local residents to make more use of unused urban spaces.
Siivouspäiva – which translates to ‘Cleaning day‘, or more accurately set-up-your-own-flea-market day – and Ravintolapaivää (‘Restaurant day’, or rather set-up-your-own-restaurant day) are special events which enable anyone to set-up operations pretty much anywhere they like without the usual bureaucracy – freed from regulations concerning health and safety, taxable earnings and so forth.
As a whole, the movement is referred to in Finland as ‘Kaupunkiaktiivisuus’ – roughly translated as citizen activism. City residents come together in a collective do-it-yourself spirit. But whereas setting up a makeshift flea market or restaurant is relatively easy, saunas don’t share their mobility and are limited to the places with a swimmable waterfront. In the end, most people would agree saunas are generally better with a dip now and then and a wash at the end.
Jaakko Keso explains that he has heard of a number of other saunas being set up both in Helsinki (including one underneath a Metro bridge) as well as in a number of other Finnish cities.
“These other saunas have no affiliation with Sompasauna but we have no problem with their existence and they get nothing but encouragement from us. We want many more of these popping up in the future.”
The guerrilla saunas are generally set up somewhere without official approval so their existence is undercut with an air of anticipation as to how long the sauna will be in operation before the marching orders are given to vacate.
Sompasauna’s origins are a bit cloudy. Who originally decided this was a great sauna spot is unknown, but the story goes that he/she/they just decided to make a sauna from left over bits and pieces of what was once the surrounding industrial wasteland and it didn’t take long for it to be a ‘best kept secret’ in Helsinki with more and more people coming from all walks of life to contribute to and enjoy the community atmosphere. The mysterious primordial beings could well be mingling amongst the sauna lovers and no-one is any the wiser, but it seems they don’t bother to go about tooting their horn.
Sompasauna has only recently received some official recognition.
Sompasauna is run on a purely volunteer basis and it’s only recently that a Sompasauna Association was established, but its purpose is predominantly to keep some minimal quality control. Besides the volunteers needed to keep operations and maintenance going, Sompasauna is also reliant on donations. Keso is happy to report that there were lots of generous donations during the regular summer parties. And that’s certainly very well because with the sauna in use 24/7 during the summer months, the sauna stove goes into meltdown and is in need of constant replacement.
Keso explains that they have had both positive and negative experiences in dealing with the decision makers at the Helsinki Municipal offices. Some are all for what they are doing but others not so much. Recently, the Sompasauna community was the recipient of the 2016 Helsinki Culture award for “how it represents Finnish sauna culture, Sisu (guts and determination) as well as being an outstanding example of how citizens can take over unused space in the city, making it a better place to live.”
As an award from the city of Helsinki it represented the first official acknowledgement of Sompasauna and finally some vindication.
- Joha Grönvall
Sompasauna’s future is as cloudy as its origins.
Sompasauna is located right on the edge of the Smart Kalasatama city development, which will eventually be home to apartment buildings as well as a massive business and retail park. That spells Sompasauna’s demise pretty clearly on the horizon. It has already been threatened with closure for a couple of years but somehow managed to survive. Keso and company take it a year at a time.
When asked if they have some ideas where to go when Sompasauna is finally no more, Keso says optimistically, “We have a few places in mind, and sometimes for fun we look at Google maps in satellite view to see potential locations where we could set up.”
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It’s ironic that a country that may have a stereotype for a more social system (big government, lots of rules, control) actually presents itself as much more practical (ie cool) about self responsibility and expression.
Here in United States, there’d be NO way Sompasauna could exist. Authorities would stamp out any kind of this logical expression with a book full of rules and infractions, and as Joe Strummer would say, “clampdown” from authorities wearing blue and brown.
Civil disobedience has moved nations thru-out the history. It is time to apply it to sauna, which moral ground is acceptance, tolerance, and peace.
Wikipedia “The core of civil disobedience can be summarized as follows: it is an open and publicity seeking action that deliberately violates a law or a law-based order or decision, in particular on moral grounds, in order to correct the perceived injustice.”
Kansalaistottelemattomuus on liikuttanut kansoja läpi historian. On aika soveltaa sitä saunaan, jonka moraalinen perusta on hyväksyntä, suvaitsevaisuus, ja rauha.
Wikipedia: “Kansalaistottelemattomuuden ydin voidaan tiivistää seuraavalla tavalla: kyseessä on avoin ja julkisuushakuinen toiminta, jossa erityisesti moraalisin perustein rikotaan tietoisesti lakia tai lakiin perustuvaa määräystä tai päätöstä, tavoitteena korjata koettu epäoikeudenmukaisuus.”
Love this! The fact that the local government is in favor of this is a model of what government should be…for the people ,” not daddy knows best and will protect you from yourself”.
Good one!a