How long should you stay in a sauna?

For most healthy adults, a comfortable sauna session lasts about 15-20 minutes. If you are new to it, start with just 5-10 minutes and build up over time. There is no prize for staying longer, and the most important rule is simple: leave whenever you feel ready, and never push past your comfort.

The short answer

If you want a number to work from, these are reliable starting points:

• Beginners: 5-10 minutes per session.
• Most people: 15-20 minutes.
• Experienced users: up to about 20-30 minutes, often split across rounds.

These are general guides, not targets you need to hit. The right length is the one you can sit through calmly, breathing easily, without counting down the seconds until you can leave. Some days that will be shorter than usual, and that is completely normal.

Session length by experience level

Your tolerance for heat builds gradually, much like fitness. Pushing for a long session before your body has adapted is the most common beginner mistake, and it usually ends in feeling worse, not better.

The progression matters more than the destination. Adding a few minutes every week or two lets your body adjust at a sustainable pace. If you are also wondering how many sessions to fit into a week, our guide on how often you should use a sauna covers building a routine without overdoing it.

Session length by sauna type

How long you can comfortably stay depends heavily on how hot the room is, and that varies by sauna type.

• Traditional (Finnish) saunas run hot, roughly 150-195°F, so sessions tend to be shorter. Many people find 10-15 minutes is plenty, especially with steam.
• Infrared saunas run cooler, around 110-140°F, because they warm your body directly rather than heating the air. The gentler air temperature means many people sit comfortably for 20-30 minutes.

Temperature and time work together: a hotter room generally means a shorter session, and a cooler one allows a longer one. If you want to dial in the heat itself, see how hot a sauna should be, and for the broader differences between the two styles, our infrared vs traditional sauna comparison breaks it down. The key point is not to judge time by one fixed number; judge it by how the heat actually feels on the day.

Why longer isn’t better

It is tempting to assume that if a sauna is good for you, more time must be better. That is not how it works. The benefits people associate with regular sauna use come from consistent, comfortable sessions, not from endurance. Staying in far longer than feels good mainly increases the downsides.

Here is what is happening to your body during a typical session:

• In the first few minutes, your skin warms and your heart rate begins to climb gently.
• Over the next 10-15 minutes, you sweat steadily, your blood vessels widen, and your core temperature rises modestly. This is the comfortable, productive part of a session.
• Beyond that, you keep losing fluid and your body works harder to stay cool. The extra time adds strain and dehydration risk without adding meaningful benefit.

In other words, the useful part of a sauna session is front-loaded. Stretching it out long past comfort trades a small, imagined gain for a real increase in risk.

Multiple rounds and cooldowns

Experienced sauna-goers often prefer several shorter rounds rather than one long stretch. A common rhythm looks like this:

1. Round one: 10-15 minutes in the heat.
2. Cooldown: 5-15 minutes out of the sauna — fresh air, a cool shower, and some water.
3. Round two (and optionally three): another 10-15 minutes, repeating the cooldown each time.

In traditional saunas, each round is often paced by löyly — the burst of steam from ladling water onto the hot rocks. The cooldown between rounds is not wasted time; it lets your heart rate settle, gives your body a break from continuous heat, and makes the next round feel fresh rather than draining. Total time in the heat across rounds might add up to 30-40 minutes, but no single stretch is excessive.

You are ready to go back in when you feel comfortable again — relaxed and cooled, not still flushed or short of breath.

Signs it’s time to get out

This is the part that overrides every number in this article. Listen to your body and leave immediately if you feel unwell. Watch for:

• Dizziness or lightheadedness
• Nausea
• Headache
• A racing or pounding heart
• Confusion, faintness, or simply feeling “off”

None of these are signs to tough it out. They are your body telling you it has had enough heat, and the right response is to step out, cool down gradually, sit somewhere comfortable, and rehydrate. There is no benefit to enduring discomfort, and ignoring these signals is how an enjoyable session turns into a genuinely risky one.

Timing after a workout

A sauna can be a pleasant way to wind down after exercise, but it deserves a little extra caution. After a hard session you are already warm and somewhat dehydrated, so your usual time may feel like too much. Keep it shorter — around 10-15 minutes — and rehydrate before you go in rather than after.

Skip the sauna entirely if you feel depleted, dizzy, or unwell from the workout itself. For more on timing it well and what to expect, see our guide on using a sauna after a workout. The general principle: treat the post-workout sauna as a relaxing finish, not as a way to squeeze out extra effort.

Hydration and who should be cautious

You lose a meaningful amount of fluid sweating, and that loss is the main reason longer sessions carry more risk. A few simple habits keep things safe:

• Drink water before and after every session, and sip during longer ones.
• Never combine sauna use with alcohol, which impairs your sense of heat and raises the risk of fainting and dehydration.
• Don’t go in hungry, exhausted, or already dehydrated — your tolerance will be lower than usual.

Some people should be especially careful or check with a professional first. Consult a doctor before using a sauna if you are pregnant, or if you have heart conditions, blood pressure concerns, or any chronic illness. Heat places real demands on your cardiovascular system, so for these groups, shorter sessions and medical guidance matter more than any general recommendation here.

The bottom line

For most healthy adults, 15-20 minutes is the comfortable sweet spot, beginners should start at 5-10 minutes, and experienced users can stretch toward 20-30 minutes, often split into rounds with cooldowns between. Cooler infrared saunas allow longer sessions than hotter traditional ones, but the same rule governs every type: the right length is the one that feels good, and you should leave the moment you feel dizzy, nauseous, or unwell. Build up gradually, stay hydrated, and let comfort — not a stopwatch — be your guide. If you are choosing a sauna that fits gentler, longer sessions, our roundup of the best infrared saunas is a good next step.