The Ultimate Guide to the Sauna Bath

What Is a Sauna Bath?

A sauna bath is a therapeutic heat session that involves spending time in a specially designed room or enclosure heated to temperatures typically ranging from 150°F to 195°F (65°C to 90°C). Originating in Finland over 2,000 years ago, sauna bathing has evolved from a simple survival practice into one of the most widely studied and celebrated wellness traditions in the world. Today, millions of people across every continent enjoy regular sauna sessions for relaxation, health improvement, and social connection.

The principle behind every sauna bath is elegantly simple: expose the body to controlled heat, triggering a cascade of beneficial physiological responses. Your heart rate increases, blood vessels dilate, circulation improves, and you begin to sweat profusely. These responses mimic many of the effects of moderate cardiovascular exercise, which is why researchers have found such compelling links between regular sauna use and improved heart health.

Types of Saunas Explained

Not all saunas are created equal. Understanding the differences between sauna types will help you choose the experience that best matches your wellness goals, budget, and available space. Here are the primary types you should know about:

Traditional Dry Sauna (Finnish Sauna)

The classic Finnish sauna uses an electric heater or wood-burning stove to heat volcanic rocks, which radiate warmth throughout the room. Temperatures range from 150°F to 195°F with relatively low humidity — typically between 10% and 20%. Bathers can pour water over the hot stones (called löyly in Finnish) to create bursts of steam, momentarily raising the humidity. This is the most traditional and widely recognized form of sauna bathing.

Infrared Sauna

Rather than heating the air around you, infrared saunas use infrared light panels to directly warm your body. Operating at lower temperatures of 120°F to 150°F, they produce a deep, penetrating heat that many users find more comfortable than traditional saunas. Infrared saunas have become enormously popular for home use because they are energy-efficient, require less space, and heat up quickly. They are available in near-infrared, mid-infrared, and far-infrared wavelengths, each offering slightly different therapeutic properties.

Steam Room (Wet Sauna)

A steam room, sometimes called a steam bath, operates at much lower temperatures (110°F to 120°F) but at nearly 100% humidity. The moist heat opens airways and is especially beneficial for those with respiratory issues. Steam rooms are typically tiled rather than wood-lined and use a steam generator to produce continuous clouds of warm vapor.

Health Benefits of Regular Sauna Bathing

The science supporting sauna use has grown dramatically in recent decades. Landmark studies — including a 25-year longitudinal study from the University of Eastern Finland — have revealed a strong association between regular sauna bathing and reduced risk of cardiovascular disease, stroke, and all-cause mortality. Here is a summary of the key advantages of sauna bathing:

How to Take a Sauna Bath: Best Practices

Whether you are a first-time sauna bather or a seasoned enthusiast, following these best practices will help you get the most out of every session while staying safe and comfortable:

Hydrate before and after. Drink at least one to two glasses of water before entering the sauna, and replenish with water or an electrolyte drink immediately afterward. You can lose up to a pint of sweat in a single session, so proper hydration is essential.

Start with shorter sessions. If you are new to sauna bathing, begin with 10 to 15 minutes at a moderate temperature. Gradually increase your session length as your body adapts to the heat. Most experienced bathers enjoy sessions lasting 15 to 25 minutes.

Cool down gradually. After leaving the sauna, allow your body to cool naturally for at least 10 minutes. A lukewarm shower, a dip in a cool pool, or simply sitting in fresh air are all excellent ways to transition. Finns traditionally alternate between the sauna and a cold plunge, which further stimulates circulation.

Listen to your body. The golden rule of sauna bathing is to leave immediately if you feel dizzy, lightheaded, or uncomfortable. There is no prescribed minimum time — your comfort is the guide.

Who Should and Shouldn't Use a Sauna

Sauna bathing is safe and enjoyable for the vast majority of healthy adults. People of virtually all ages — from children old enough to regulate their body temperature to seniors — can benefit from regular heat therapy. Research has even shown that sauna use is generally safe for individuals with stable heart conditions, and may in fact be beneficial.

However, certain groups should exercise caution or avoid sauna use entirely. Infants and very young children should not use saunas, as they cannot regulate body temperature effectively. Those with unstable angina, recent heart attack, or severe aortic stenosis should consult their physician before using a sauna. Pregnant women should seek medical guidance, though research suggests that sauna use during an uncomplicated pregnancy is generally considered safe in countries where it is culturally common.

Anyone taking medications that affect blood pressure or heart rate should speak with their doctor before beginning a sauna routine. And regardless of your health status, alcohol consumption before or during sauna use is strongly discouraged, as it increases the risk of dehydration, hypotension, and other potentially dangerous complications.

Explore Our Sauna Guides

Ready to dive deeper? We have created in-depth guides covering every aspect of the sauna experience. Whether you want to build your own sauna from scratch, learn about infrared sauna therapy, or compare portable infrared saunas, our articles will help you make informed decisions.

Last reviewed and updated: March 2026