Sauna vs Steam Room: Benefits and Which to Choose

Saunas use dry heat at 150 to 195 degrees Fahrenheit with low humidity around 10 to 20 percent. Steam rooms use moist heat at 110 to 120 degrees Fahrenheit with near 100 percent humidity. Although the sauna operates at higher temperatures, the high humidity in a steam room makes heat transfer to the body more efficient, creating a similarly intense experience. Both are available at most full-service spas as amenity facilities.

What Is the Difference Between a Sauna and a Steam Room?

The fundamental distinction is humidity, not just temperature. That distinction shapes the entire physiological experience.

A sauna - traditionally Finnish in origin - uses heated rocks or an electric heater to warm air to between 150 and 195 degrees Fahrenheit. Humidity stays low, around 10 to 20 percent, because dry air is the point. In a Finnish sauna, water is periodically poured over the rocks to produce a brief burst of steam called "loyly," but the dominant environment is dry heat. The low humidity means sweat evaporates quickly from the skin, which is how the body cools itself in that environment.

A steam room uses a steam generator to fill an enclosed space with wet heat at 110 to 120 degrees Fahrenheit and 100 percent relative humidity. Because the air is already saturated with moisture, sweat cannot evaporate. The body's cooling mechanism is compromised, which is why a steam room at a lower temperature can feel more oppressive than a dry sauna at a significantly higher one.

Data based on North American Sauna Society guidelines and standard spa facility specifications.

Sauna Benefits: What the Research Shows

The sauna has the larger and more rigorous research base of the two. Much of it comes from Finland, where sauna use is a cultural institution and population data is available over long time periods.

Cardiovascular markers: A landmark longitudinal study published in JAMA Internal Medicine in 2015 followed 2,315 Finnish men and found that frequent sauna use (four to seven times per week) was associated with significantly lower rates of cardiovascular disease mortality compared to once-weekly use. The associations held after adjusting for other lifestyle factors. The mechanism is thought to involve repeated cycles of heat-induced vasodilation and the cardiovascular stress response, which over time may improve vascular function.

Blood pressure: Short-term sauna use produces a temporary drop in blood pressure. Multiple controlled studies show post-sauna reductions in both systolic and diastolic pressure lasting 30 to 60 minutes. Long-term effects on hypertension are less clear, and people with existing hypertension should consult their physician before using a sauna regularly.

Muscle recovery: Small studies on post-exercise sauna use show reductions in delayed onset muscle soreness (DOMS) compared to passive recovery. The mechanism is increased blood flow to muscle tissue and possible effects on inflammatory markers. The evidence is promising but limited in scale.

Mood and relaxation: Sauna use reliably produces relaxation. The physiological pathway includes both the heat response itself and the parasympathetic rebound after exiting the sauna. Regular sauna users frequently report improved mood and reduced perceived stress, consistent with what you would expect from a repeated relaxation practice.

Steam Room Benefits: What the Research Shows

Steam rooms have a smaller evidence base than saunas, largely because they are less studied. The cardiovascular and relaxation mechanisms are similar: heat-induced vasodilation, elevated heart rate, and a parasympathetic rebound after exiting. The most distinct benefits are respiratory.

Upper respiratory relief: The warm, humid air in a steam room can temporarily ease nasal congestion and upper respiratory discomfort. Moist heat loosens mucus in the airways in the same way that a hot shower relieves congestion. The AAD notes that steam can temporarily open pores, though the dermatological benefit of this is modest. Steam rooms are commonly recommended by spa providers as a pre-treatment preparation to open pores before a facial.

Perceived skin hydration: The humid environment creates the feeling of softer, more hydrated skin during and immediately after the session. This is largely a surface-level, temporary effect - the stratum corneum absorbs moisture from humid air, but the effect reverses once you are in normal air conditions. It does not replace topical moisturizer.

Respiratory caution: People with asthma should exercise caution with steam rooms. While some people find warm moist air soothing, others find that hot humid air triggers bronchospasm. If you have asthma or reactive airway disease, consult your physician before using a steam room regularly.

Sauna vs Steam Room: Side-by-Side Comparison

Which Is Better for Muscle Recovery?

Both heat environments increase blood flow to muscle tissue, which aids in clearing the metabolic byproducts that contribute to soreness after exercise. For muscle recovery specifically, the sauna has more clinical support, and the post-exercise sauna protocol (15 minutes in the sauna within two hours of finishing exercise) has been studied in controlled settings.

Steam rooms produce a comparable cardiovascular response and likely achieve similar circulatory effects on muscle tissue. The practical difference is that steam rooms are often cooler-feeling in the initial minutes because your skin temperature rises more slowly in humid heat than in the aggressive radiant heat of a sauna. If pure post-workout recovery is your goal and you have access to both, either works - choose based on which environment you tolerate better.

Which Is Better for Respiratory Health?

For upper respiratory congestion and the temporary relief that comes with warm, moist air, the steam room is the better choice. The moist air directly addresses the mechanism - mucus loosening and airway hydration - that makes inhaled steam useful for congestion relief.

For people with asthma or lower respiratory conditions, the picture is more complex. Some benefit from moist heat; others find it triggers airway reactivity. If you are managing a respiratory condition, get guidance from your physician on which environment is appropriate.

Who Should Avoid Saunas and Steam Rooms?

• Pregnancy: Both are generally advised against during pregnancy without explicit physician clearance. Heat exposure that raises core body temperature is the specific concern, particularly in the first trimester.
• Cardiovascular conditions: See the callout above. Clearance from your physician is the threshold, not self-assessment.
• Skin conditions: Active eczema flares, rosacea, and open wounds can be aggravated by either heat environment. Consult a dermatologist if you have an active skin condition.
• Low blood pressure (hypotension): The post-session drop in blood pressure can cause dizziness or fainting in people with already-low pressure. Exit slowly, sit for a moment before standing.
• Medications: Diuretics, blood pressure medications, and some psychiatric medications affect fluid balance or heat tolerance. Confirm with your prescriber.

Sauna vs Steam Room at a Spa: What to Expect and Typical Costs

At most full-service day spas and resort spas, both facilities are available as shared amenities. Standalone access fees, where charged, typically run $15 to $50 for a half-day pass, according to pricing patterns across US spa facilities. Many spas include amenity access at no additional charge when you book a treatment.

For a full breakdown of what a spa day includes and how to budget across multiple amenities and treatments, see our guide on how much a spa day costs. For a broader look at what individual treatments typically run at US spas, the average spa treatment prices guide has a full breakdown.

If you are specifically interested in the infrared variant of the sauna - which operates at lower temperatures and uses a different heat delivery mechanism entirely - see our dedicated guide on infrared sauna benefits.