The Finnish Way — There Is Only One
Finns don't really think of the sauna as a luxury or a wellness trend. It is simply what you do. You go in, you sweat, you cool down, you repeat. Then you sit outside and eat a sausage. That's it. Five hundred years of tradition, and the recipe has barely changed. Here is how to do it properly.
Before You Go In
Shower first — a quick rinse, nothing elaborate. The sauna is not for cleaning; it is for sweating. You want to go in already clean so the heat can do its work without the layer of the day on your skin.
Heat the sauna to around 80 °C. This is the Finnish sweet spot — hot enough that you feel it immediately, cool enough that you can sit comfortably for a full round. Some go higher, some a little lower, but 80 °C is where the ritual lives. If your sauna heater has a controller, set it and give the room a good 45–60 minutes to come up to temperature so the stones are truly soaked with heat.
Take in a wooden bucket of water and a ladle. Leave your phone outside.
Get Undressed — Completely
This is not negotiable in a traditional Finnish sauna. Clothes trap steam, block sweat and feel uncomfortable. Finns sauna naked, full stop. A small towel to sit on is entirely sensible — for hygiene and because the bench can get very warm — but that is the only textile that belongs inside.
Sit, Sweat and Throw Löyly
Climb to the upper bench where the heat is strongest, settle in, and breathe slowly. After a minute or two, ladle a small amount of water onto the stones. That hiss and billow of steam is löyly — the soul of the Finnish sauna. It raises the felt temperature without raising the thermometer, opening your pores and beginning the deep sweat.
Stay for 10–15 minutes. Talk quietly if you are with someone, or sit in silence. There is no rush and no performance. When the sweat is running freely and the heat feels like enough, it is time to go out.
The Vihta — Don't Skip This
The vihta (or vasta, depending on which part of Finland your sauna-master comes from) is a bundle of leafy branches — traditionally silver birch — that you soak in warm water until soft and fragrant, then use to gently beat and sweep your skin in long, slow strokes. It increases circulation, opens pores further, and fills the sauna with a green, almost medicinal scent. It feels extraordinary.
Fresh birch vihtas are hard to find in Thailand, but we sell eucalyptus vihtas that work beautifully in the same way — eucalyptus has its own wonderful aroma and the leaves hold up well to the heat. Drop us an email to ask about availability and we will sort you out. If you can get a vihta of any kind, use it every round. If you can't, you are still having a genuine sauna; you are simply missing the best part.
The Cold Plunge — The Other Half of the Ritual
Step outside and cool down. In Finland this means a lake, a hole in the ice, or a cold shower. In Thailand it means an ice bath or a cold shower, and both work perfectly. The contrast between the heat of the sauna and the cold of the plunge is where most of the physiological magic happens — heart rate drops, endorphins flood, the skin tingles. Lower yourself in slowly the first time. After a few sessions you will want to jump straight in.
Stay in the cold for 1–3 minutes, then sit outside in the air for a few minutes before going back in. This rest between rounds matters — your body is still working hard even when you are just sitting.
Repeat — Two or Three Rounds
Go back in. Throw more löyly. Sweat. Cool down again. A proper Finnish sauna session is two to three rounds, sometimes more if the evening is long and the company is good. There is no correct number — you stop when you feel completely wrung out in the best possible way.
Drink water between rounds. You are losing a surprising amount of fluid. A cold beer between rounds is also a Finnish tradition, and nobody will judge you.
After the Last Round — The Best Part
Cool down fully, rinse off, and go outside. Now you sit. You watch the sky change colour. You do not look at your phone.
The traditional finish is a grilled sausage — a fat Finnish makkara, cooked over coals until the skin splits and chars — served with a fierce, grainy mustard. Alongside it, a cold beer. This combination, after a long sauna, is one of the great simple pleasures of human life. It is not incidental to the experience; it is the experience.
In Thailand you work with what you have. Any good sausage on the grill, the hottest mustard you can find, and a cold Chang or Singha as the sun drops below the treeline. The principle holds perfectly.
Ready to Build the Sauna?
The ritual only works if the sauna is right. Every Sisu Sauna is built for real löyly — proper insulation, stones that hold heat, and a room that reaches 80 °C and stays there. Design yours at sisusauna.app and see the price live as you choose your size, wood and heater.