Do Finns really sauna naked?

Among family or in a private household sauna, yes, nudity is the norm and considered completely unremarkable. In public and workplace saunas, a swimsuit is standard, and mixed-gender public saunas almost always require one.

How hot is a Finnish sauna?

A typical Finnish sauna runs between 70°C and 100°C (roughly 160-212°F), with humidity added in bursts by throwing water on the hot stones, a practice called löyly.

Is it true Finnish babies were once born in saunas?

Yes. Before modern hospitals were widespread, the sauna was considered the cleanest, warmest and most sterile room in a Finnish home, and it doubled as a birthing room in rural areas well into the 20th century.

Finnish Sauna Culture Explained

More sauna than car

There are well over three million saunas in Finland, a country of about 5.6 million people — roughly one for every two residents. They show up in apartment buildings, detached houses, summer cottages, workplaces, and even inside the Finnish parliament building. For most Finns, "let's sauna" (an actual verb in Finnish English, "saunoa") is as ordinary a suggestion as "let's have coffee."

A short history

The Finnish sauna tradition stretches back well over a thousand years, originally built as a simple pit or log structure heated by a wood fire with no chimney — the smoke sauna, or savusauna, which filled with soot-scented smoke before being aired out and used. Long before running water was common, the smoke sauna was the cleanest room available, used for washing, and even as an operating room and birthing room. Modern electric saunas, standard in Finnish apartment buildings since the mid-20th century, are a comparatively recent convenience layered on top of a much older ritual.

What actually happens in a Finnish sauna

Water gets thrown onto hot stones sitting on top of the heater, producing a burst of steam Finns call löyly — the word describes the specific sensation of heat hitting your skin, not just "steam" in general. Temperatures typically run between 70°C and 100°C. Some sauna-goers use a vihta (or vasta, depending on dialect), a bundle of fresh birch branches, to gently swat their skin — it's said to improve circulation and leaves a distinctive scent behind. Conversation is usually quiet and unhurried; a Finnish sauna is closer to a place to decompress than a place to socialize loudly.

Ice swimming: sauna's cold-weather other half

Alternating sauna heat with a plunge into cold water is a core part of the ritual, and in winter that means avantouinti — ice swimming through a hole cut into a frozen lake or the sea. It's a mainstream hobby rather than a stunt: many towns maintain a public ice hole all winter, and regulars swear the shock of cold water after sauna heat is what actually makes the whole thing feel restorative. If you want the fuller picture of where all that water comes from, see our deep dive on Finland's lakes.

Recognized by UNESCO

In December 2020, UNESCO added Finnish sauna culture to its Representative List of the Intangible Cultural Heritage of Humanity — official recognition that sauna in Finland isn't just a way to get clean, but a social institution used for relaxing, talking, and, historically, even settling disputes.

Finnish Sauna Culture, Explained