How to prepare for a cold sea plunge at Kvädöfjärden

Why preparation matters

A cold plunge after the sauna is intense: your blood vessels contract and your breathing wants to speed up. A little preparation makes the dip safer and more enjoyable. The basic rules apply all year at Kvädöfjärden – start short, breathe calmly, always have someone on land and listen to your body.

A cold plunge after the sauna feels dramatic the first time – and it should. Your body goes quickly from intense heat to cold water, blood vessels contract and your breathing wants to race. With a little preparation the experience becomes safer, more enjoyable and more controlled.

At Kvädöfjärden you swim from the jetty next to the sauna. The water ranges from ice cold in spring to pleasantly warm in late summer. Whatever the season, the same basic rules apply: start short, breathe more slowly, have someone on land, and listen to your body.

Before you get in the water

Drink water before the sauna, avoid alcohol on the day and eat a light meal a while beforehand. Put a towel and warm clothes close to the jetty and bring water shoes if the jetty is slippery. Tell your group if you are a beginner, so everyone knows you are taking it carefully.

Drink water before the sauna – you sweat more than you think. Avoid alcohol on the day. Eat a light meal earlier so you have energy, but wait a while after eating before a hot sauna.

Have a towel and warm clothes ready on land. Water shoes can help on slippery jetties. If you are a beginner, say so to your group so that everyone knows you are taking it carefully.

• Towel and dry clothes near the jetty
• Water shoes if the surface is slippery
• No alcohol before swimming
• Tell others if you are new or unsure

Step by step into the water

Go in slowly and focus on long out-breaths when the cold hits. Your first dip only needs to be 10–30 seconds – get out before you feel numbness or dizziness. Dry off, warm up in the sauna or changing room, and repeat two or three times if it feels good.

Go in slowly. Lower yourself to waist height first if you want your body to adjust. Breathe out slowly – many people react with a sharp in-breath when the cold hits, and it can feel like panic. Focus on long out-breaths.

First dip: 10–30 seconds is enough. Get out before you feel numbness or strong dizziness. You can increase the time over several sauna rounds on the same day, but do not push for a record the first time.

After the dip: dry off, go back into the sauna or rest in the changing room. Repeat two to three cycles if it feels good. Finish by resting quietly for a few minutes – your body keeps regulating its temperature for a while.

Different seasons, different cold

The water at Kvädöfjärden is often 18–22 °C in summer, 5–12 °C in spring and autumn, and close to zero in winter, sometimes with ice at the edge. The colder the water, the shorter the dip. Winter swimming is only for those who are used to it, and always with someone watching from land.

Summer (June–August): the water can be around 18–22 °C. It feels cold after an 80 °C sauna, but most people manage longer dips. Autumn and spring: 5–12 °C is common – short dips and warm clothes afterwards. Winter: extreme cold, possibly ice at the edge – only for experienced swimmers, briefly, always with someone watching.

Check the weather and wind. A cold wind off the water chills you faster on land after the dip. Plan a calm day for your first time, not storms and pouring rain.

When to skip it

Skip the cold plunge if you are ill, feverish, dizzy or feel stressed in your body. Pregnant people and anyone with unstable blood pressure or heart problems should talk to a doctor first, and children must always have an adult beside them. It is perfectly fine to just enjoy the sauna – the sea will still be there next time.

Skip the cold plunge if you feel ill, feverish, dizzy or physically stressed. Pregnant people and those with unstable blood pressure or certain heart conditions should consult a doctor first. Children must always be supervised by an adult and keep dips short.

It is perfectly fine to enjoy the sauna without a sea plunge. The experience at Kvädöfjärden is still worth the trip – the sea will be there next time.