An avanto is a hole cut in lake or sea ice, with steps down into it and usually a sauna a short walk away. Getting into one in February is a normal Finnish hobby with clubs, season tickets and a membership card, and the season runs roughly from October to April, with plenty of regulars swimming year round.
It is also genuinely cold-water immersion, which is worth saying plainly before the vocabulary: the first few seconds do something sharp to your breathing and your heart rate. The words below are the easy part. The safety section near the end is the part to read twice.
The Words for the Thing
winter swimming
talviuinti
ice-hole swimming
avantouinti
ice hole
avanto
ice
jää
steps
portaat
handrail
kaide
changing hut
pukukoppi
winter swimming club
talviuintiseura
water temperature
veden lämpötila
degree
aste
Practice these words
talviuinti
Two words, one hobby: talviuinti is the general term and avantouinti is the specific one — swimming in a cut hole rather than open water. Clubs use both, often in the same sentence.
What to Bring
swimsuit
uimapuku
woolly hat
pipo
neoprene socks
neopreenisukat
neoprene gloves
neopreenikäsineet
bathrobe
kylpytakki
sauna
sauna
Practice these words
uimapuku
The hat is not a joke: most of your heat goes out through your head, so a pipo stays on — and it is a reminder to keep your head above the surface. Neoprene socks and gloves matter more than they sound like they should — hands and feet hurt first and longest, and they're what make a second dip bearable.
At the Water
Is the ice hole open?
Onko avanto auki?
How cold is the water?
Kuinka kylmä vesi on?
How many degrees?
Montako astetta?
Where's the sauna?
Missä sauna on?
It's my first time here.
Olen täällä ensimmäistä kertaa.
Is it safe?
Onko se turvallista?
Go down the steps.
Mene portaita alas.
Don't dive.
Älä sukella.
Breathe calmly.
Hengitä rauhallisesti.
Don't go alone.
Älä mene yksin.
I'm getting out.
Nousen ylös.
That was cold!
Olipa kylmää!
Practice these words
Onko avanto auki?
Expect a number near zero: in midwinter the answer to montako astetta? is usually nought to two degrees. Fresh water under ice cannot go below zero; brackish Baltic sea water sits a fraction below it. Reading those numbers back needs the Finnish numbers, and the rest of the cold-weather vocabulary is in snow, ice and winter words.
The Rules That Matter
| Rule | Why |
|---|---|
Never alone. | Cold water can take your breath and your grip in seconds. Go where other people are, or with someone. |
Walk in, don't jump. | Sudden full immersion triggers an involuntary gasp. If your face is under when it happens, you inhale water. |
Keep your head out. | No diving, no swimming underwater. This is the single most important rule. |
Seconds, not minutes. | Regulars count in tens of seconds. A first dip can be ten seconds and still count. |
No alcohol. | It blunts your judgement of how cold you are and how long you've been in. |
Cool off before you go in. | Don't step straight from a hot sauna into the hole. Stand in the air for a moment first. |
Warm up gradually afterwards. | Sauna or a warm room, not a hot shower straight onto cold skin. |
Ask a doctor first if you have a heart condition, high blood pressure, or you're pregnant. | Cold immersion sharply raises heart rate and blood pressure. |
Be careful what you read about this: Finns will tell you avantouinti helps with sleep, stress, circulation and winter colds, and the internet will tell you more. The evidence for most of those claims is thin or mixed. What is well established is the other side: cold water immersion causes an involuntary gasp reflex and a sudden spike in heart rate and blood pressure, which is a real risk for some people. Treat it as something enjoyable that carries a risk, not as a treatment.
How It Actually Works
The usual order is sauna first, water second, and then back again. You heat up properly, walk out, go down the steps, stay in for as long as feels fine rather than as long as you can manage, and get back to the heat. Most people do two or three rounds over an hour or so. Nobody is timing you and there's no competition — the same unhurried pace as ordinary sauna etiquette, which this is really an extension of.
Clubs are how most Finns do it. A talviuintiseura runs the hut, keeps the hole cut and the steps clear, sells a season membership, and is usually the cheapest way in — and in a city there's often one within a tram ride. Helsinki, Tampere, Turku and Oulu all have several. Public options exist too, and some paid sauna venues have an ice hole or a cold pool included in the ticket.
What catches first-timers isn't the cold going in — it's getting out. Your skin reports back all at once, your hands stop doing what you tell them, and the walk to the sauna door feels much longer than it did in the other direction. That part passes in a minute or two, and it's the reason the changing hut is close to the water.
If you'd rather build up to it, the gentler version is what Finns do all summer: sauna, then a lake. The temperature changes, the habit doesn't. The vocabulary in sauna words covers both.