More saunas now come with a cold plunge — a tub of cold water for dipping between heat rounds. Here’s what a session at a public venue usually looks like.
How contrast sessions usually work
- A round in the sauna.
- A rinse, then a short cold plunge — or a cold shower if you prefer.
- Rest, drink water, and repeat if you want another round.
There’s no single protocol; venues post their own guidance and time limits.
What the cold feels like
Cold water triggers a gasp and fast breathing in the first moments — the cold-shock response. Enter slowly, keep your head above water, and breathe out steadily. Most people find it gets easier after the first few seconds, but the effect on your heart and blood pressure is real.
Safety basics
- Never plunge alone or after alcohol.
- Get out if you feel numb, dizzy, confused or short of breath.
- If you have a heart condition or high blood pressure, or are pregnant, ask a doctor first.
- Rinse before using a shared plunge.
Where to find one
Social sauna clubs and many bathhouses have plunges; some infrared studios and gyms do too. City pages show places whose listing mentions a cold plunge, but always confirm with the venue. Search by city.
Frequently asked questions
How cold is a cold plunge?
Venue plunges are commonly kept somewhere around 38–60°F (3–15°C), and many post the current temperature. Colder is not required to enjoy one.
How long should you stay in a cold plunge?
Follow the venue’s posted guidance. First-timers usually stay seconds to a minute or so; get out if you feel numb, dizzy or short of breath.
Is it safe to go from a sauna into a cold plunge?
Many people do, but the sudden cold causes a gasp reflex and a spike in heart rate and blood pressure. If you have a heart condition or high blood pressure, or are pregnant, ask a doctor first, and never plunge alone.