A traditional sauna normally runs at 70 to 100 °C (160 to 212 °F) and an infrared sauna at 45 to 65 °C (113 to 150 °F). Here is what is normal, what most people find ideal, and why the same number can feel very different.
A traditional Finnish-style sauna normally runs between 70 and 100 °C (160 and 212 °F), measured near the top bench. Most home saunas sit somewhere around 80 to 90 °C (176 to 194 °F). Infrared saunas run much cooler, usually 45 to 65 °C (113 to 150 °F), because they warm the body directly instead of heating all the air.
In North America the upper end is often set by the equipment. Many electric heater controls sold for the US and Canadian market stop at around 90 °C (194 °F), so a thermostat reading higher than that is unusual in a home sauna.
Ideal temperature
There is no single right number. Most regular sauna users settle between 75 and 90 °C (167 and 194 °F) and then adjust the feel with steam rather than by turning the thermostat higher. A useful approach for a new sauna:
Start at about 70 to 75 °C (160 to 167 °F) for the first sessions.
Sit on the lower bench first and move up as you get used to it.
Throw small amounts of water on the stones to raise the felt heat instead of adding degrees.
Raise the set point a few degrees at a time until it feels right for you.
For infrared cabins, most people use 50 to 60 °C (122 to 140 °F) and longer sessions.
Combination heaters, such as the Harvia Virta Combi or Tylö Sense Combi, add a water reservoir so they can run a lower-temperature, more humid mode alongside normal sauna heat. See the Harvia and Tylö pages for those lines.
Why the top bench is hotter
Hot air rises, so a sauna is always hotter near the ceiling than near the floor. The difference between the top bench and floor level can be large, which is why your feet may feel cool while your head is very hot. Two things reduce the gap:
Good air circulation. A correctly placed fresh-air inlet near the heater pulls cool air through the heat, mixing the room. Our guide to sauna ventilation shows the usual layouts.
Heater design. Saunum heaters have a built-in unit that pushes hot ceiling air back down to bench level. Read more on the Saunum page.
Heat collects under the ceiling; good airflow evens it out across the benches.
Temperature and humidity
The thermometer only tells half the story. At the same air temperature, a sauna feels much hotter after you throw water on the stones, because moist air carries heat to your skin faster and sweat stops evaporating as easily. That is why many people prefer a slightly lower set temperature with regular steam: it feels softer than very hot, very dry air.
Steam needs hot stones. A heater with a large stone mass, such as a tower heater or a heavy wood stove, keeps producing steam through a long session. A small heater with few stones cools off quickly after a few ladles. Our article on sauna stones explains how stone choice and stacking affect this.
Where the thermostat reads
The number on the control panel comes from a sensor, usually mounted on the wall or ceiling above the heater as the manual specifies. Because of that, it may not match a separate thermometer on the far wall. Neither is wrong; they are simply measuring different spots. If you want to compare, hang a sauna thermometer at head height above the top bench and use that as your reference.
Move the sensor only if the manual allows it. The sensor also protects the room from overheating, so its position is part of the safety design.
When a sauna will not get hot enough
If the room never reaches your set temperature, the usual causes are, roughly in order of how often they occur:
A heater too small for the room, especially with glass doors, tile or log walls. Check it with the sauna heater size calculator.
Too much ventilation or a door that does not seal.
Stones packed too tightly, which blocks airflow and can make the heater cycle off early.
A failed heating element or a sensor in the wrong place.
Drink water before and after, and avoid alcohol before or during a session.
Keep sessions short at first and leave as soon as you feel dizzy or unwell.
Cool down between rounds and give your body time to recover.
Children, pregnant people and anyone with a heart condition or low blood pressure should ask a doctor before using a sauna.
Questions buyers ask
What is the normal temperature of a sauna?
A traditional sauna normally runs at 70 to 100 °C (160 to 212 °F), with most home saunas around 80 to 90 °C (176 to 194 °F). Infrared saunas run at about 45 to 65 °C (113 to 150 °F).
What is the ideal sauna temperature?
Most regular users settle between 75 and 90 °C (167 and 194 °F) and add steam for more heat. Beginners can start at 70 to 75 °C (160 to 167 °F) on a lower bench.
What temperature should an infrared sauna be?
Most people use an infrared sauna at about 50 to 60 °C (122 to 140 °F), with longer sessions than in a traditional sauna.
Why does my sauna not get hot enough?
The most common causes are a heater that is too small for the room, heat loss through glass or a poorly sealed door, too much ventilation, tightly packed stones or a failed heating element.
Last checked November 8, 2026. Facts come from the brands' own sites and documents. How we check
