How Long Should You Stay in a Sauna? A Sensible Guide

How long should you stay in a sauna is the first question almost everyone asks, and the honest answer is shorter than most beginners expect. The point of a sauna is not to tough it out for as long as possible; it is to warm the body deeply, then cool down, and ideally repeat. Sitting in the heat until you feel unwell is how people end up dizzy or worse. This guide gives you realistic session times for both traditional and infrared saunas, how to build up safely, and the signals that mean it is time to step out no matter what the clock says.

The short answer

For a traditional Finnish sauna, a typical session is around 10 to 20 minutes. For an infrared sauna, which runs much cooler, sessions tend to be a little longer, roughly 15 to 30 minutes. If you are new to it, start at the bottom of those ranges, or lower: 5 to 10 minutes is plenty for your first few visits while your body learns to handle the heat.

The right length is not a fixed number, it is the point at which you have had a good, warming sweat and still feel comfortable. Two shorter rounds with a proper cool-down in between will do you far more good than one long, gritted-teeth session.

Beginners: start low and build

If you are just starting out, three rules matter more than the exact minutes.

First, keep early sessions to 5 to 10 minutes and use a cooler part of the sauna. In a traditional sauna the temperature varies a lot with height; the lower benches are significantly cooler than the top ones, so sit low while you acclimatise. Beginners are often more comfortable with the room set nearer 70°C than the 90 to 100°C an experienced bather might enjoy.

Second, build up gradually over weeks rather than in one go. Most people can comfortably work up towards 15 to 20 minutes with regular, moderate practice, but there is no prize for rushing it.

Third, limit how often you go at first. Two or three sessions a week is a sensible starting frequency; daily use is something to grow into, not begin with.

Traditional versus infrared timing

The difference in session length comes down to temperature. A traditional sauna heats the air to a high temperature, so it warms you quickly and you do not need, or want, to stay as long. An infrared sauna warms your body directly at a much lower air temperature, which feels gentler and lets some people sit comfortably for longer. If you are still deciding between the two, our traditional vs infrared sauna comparison explains how each one feels and who it suits. Whichever you use, the same principle applies: warm through, then cool down.

The cool-down is part of the session

The round is not finished when you leave the hot room. Cooling down, with a cool shower, a cold plunge, or simply fresh air, is what completes the cycle and lets your body reset before you go back in. Many regular bathers do two or three rounds of heat and cooling rather than one long stint. If you plan to pair the heat with cold water, read proper guidance first, because that is where the real risks lie; the British Sauna Society’s sauna and cold water safety page is the place to start.

Signs it is time to get out

Ignore the clock if your body tells you to leave. Step out straight away if you feel dizzy, lightheaded, nauseous, get a headache, or notice your heart pounding uncomfortably. These are signs of overheating or dehydration, not weakness, and the sensible response is always to leave, cool down and drink water.

Hydration is the single most important safety factor. You lose a large amount of fluid sweating, so drink water before you go in and again afterwards, and never use a sauna after drinking alcohol. If you are pregnant, have a heart condition or low or high blood pressure, or take medication that affects it, talk to your doctor before using a sauna at all.

Making it a habit

Once you are used to it, a rhythm of two or three rounds of 10 to 15 minutes with cooling in between, a couple of times a week, is a realistic and rewarding routine for most people. If you are thinking about a home sauna to make that easy, our barrel sauna guide is a good starting point, and the running cost calculator shows what regular use adds to your energy bill.

Frequently asked questions

How long should a beginner stay in a sauna? A beginner should start with just 5 to 10 minutes per session, sitting on a lower, cooler bench, and build up gradually over several weeks towards 15 to 20 minutes. There is no benefit to staying longer before your body has acclimatised, and doing so raises the risk of dizziness and dehydration.

Is 30 minutes too long in a sauna? In a hot traditional sauna, 30 minutes in one go is longer than most people should stay and is too long for beginners. In a cooler infrared sauna, up to around 30 minutes can be fine for experienced users. Either way, splitting the time into shorter rounds with a cool-down between them is safer and more effective.

How long should you stay in an infrared sauna? Infrared sauna sessions typically run 15 to 30 minutes because the air temperature is much lower than a traditional sauna. Beginners should still start around 10 to 15 minutes and increase gradually, listening to how they feel rather than fixing on a number.

How many times a week should you use a sauna? Beginners should limit sauna use to two or three times a week while they get used to it. Experienced, healthy users can use a sauna more frequently, up to daily, provided they stay well hydrated and feel comfortable doing so.

What are the signs you have been in the sauna too long? Dizziness, lightheadedness, nausea, a headache, or an uncomfortably pounding heart all mean you should get out, cool down and rehydrate immediately. These are signs of overheating or dehydration, and you should never push through them.