Does Sauna Help with Sleep?

Partly: a sauna may help some people sleep if it promotes relaxation and leaves time to cool afterward, although this proposed temperature-related effect is not well proven. Direct studies of sauna and sleep are limited, so any benefit is uncertain. For another approach, see the best drinks for sleep.

Can a sauna improve sleep?

A sauna might be a relaxing part of an evening routine, but it is not a reliable or established treatment for sleep problems. The available studies are small and involve specific groups, so they cannot show how well a sauna works for most people.

If you enjoy a sauna and can use it safely, you can see whether it helps you settle at night. Avoid pushing through discomfort or treating a sauna session as something you must complete to sleep well.

How might a sauna affect sleep?

A sauna warms the body, and cooling after leaving it may be relevant to sleep. Body temperature normally falls as part of the transition toward sleep, so researchers have proposed that warming followed by cooling could support that process. The limited sauna evidence does not establish that this is why a person sleeps better.

A sauna may also feel relaxing, and a predictable evening routine can make it easier to wind down. The effect is individual: heat may leave some people feeling uncomfortable or alert instead. If a sauna makes you feel worse or interferes with your bedtime, it is reasonable to skip it.

What does the research say about sauna and sleep?

In a randomized crossover study of 16 male basketball players, participants used an infrared sauna or rested after resistance exercise. Researchers collected sleep-diary information, but the published abstract does not report a clear improvement in sleep quality. The study primarily examined exercise recovery, and its findings cannot establish a sleep benefit for the general population.

A separate pilot study in people receiving peritoneal dialysis reported better sleep-questionnaire scores during a period of portable sauna use. Participants had fluid overload and were being monitored for a medical condition; some sauna sessions caused dizziness or a skin burn. Without a separate control group, the study cannot show that the sauna caused the sleep improvement.

These studies leave important questions unanswered, including who might benefit and whether any improvement lasts. They do not establish a best sauna temperature, session length or bedtime schedule for sleep.

How should you use a sauna for sleep?

If you have no reason to avoid heat, try a brief, comfortable session earlier in the evening rather than going straight from the sauna to bed. Allow time to cool down and see how you feel. This is a practical approach, not a timing schedule proven to improve sleep.

Drink water to replace fluid lost through sweating, unless your clinician has told you to limit fluids. There is no need to force large amounts of water. Avoid alcohol before or during a sauna session, and do not fall asleep in the sauna.

Leave promptly if you feel dizzy, nauseated, weak or unusually uncomfortable. Move somewhere cool and, if you are fully alert and not on a fluid restriction, drink some water. Seek medical help if symptoms do not improve promptly.

Pay attention to your sleep afterward rather than assuming that more heat is better. If a sauna disrupts your sleep or you dread the experience, there is no reason to keep using it for this purpose.

Who should be careful with a sauna?

Ask a clinician before using a sauna if you have heart disease, blood pressure problems, kidney disease or another condition that affects your ability to tolerate heat. This is especially important if you receive dialysis or have a prescribed fluid limit. Do not use a sauna to manage fluid overload on your own.

Some medicines, including diuretics and medicines that lower blood pressure, can affect hydration or increase the chance of dizziness in heat. Ask your prescriber about your situation; do not stop or change medication to use a sauna. During pregnancy, avoid sauna use unless your clinician advises that it is safe, and ask a child's clinician before sauna use by a child.

Leave the sauna and call emergency services for chest pain, trouble breathing, confusion or fainting. If sleep difficulties keep recurring, or you snore loudly or gasp during sleep, speak with a clinician rather than relying on a sauna alone.