Sauna temperature is not one number, because the three kinds of sauna run at genuinely different heats: a traditional Finnish sauna is the hottest, an infrared sauna is much cooler because it heats you rather than the air, and a steam room is cooler still but far more humid. Knowing which figure applies to which type is the first thing a buyer needs, because it changes the experience and the equipment.
Traditional, infrared and steam temperatures
A traditional electric or wood sauna runs hot, typically 160 to 200 degrees Fahrenheit, with low humidity you raise in bursts by pouring water on the rocks. An infrared sauna runs much cooler, around 120 to 150, because the radiant panels warm your body directly rather than heating the air, so the same felt intensity comes at a lower air temperature. A steam room is cooler again, around 110 to 120, but at full humidity, which makes it feel far hotter than the thermometer says. None of these is the correct temperature in the abstract; each is correct for its type, and choosing the type is really choosing the heat and humidity you want.
How hot a sauna should be for you
Within a traditional sauna's range, the right temperature is a personal setting rather than a fixed rule: many regular users sit at 175 to 195, beginners start lower, and the humidity you add changes the felt heat as much as the dial does. The heater's job is to reach and hold your chosen temperature, which is why sizing the heater to the cabin matters: an undersized heater in a large or glassy cabin never reaches the top of the range. Start cooler than you think, build up over sessions, and treat the published maximum as a ceiling rather than a target.
Temperature, time and the heater
Temperature and session length trade off against each other: a hotter sauna is for shorter sits, a cooler infrared session can run longer. The heater and its sizing set what temperature you can actually reach and how fast, and an infrared cabin's lower target is part of why it heats quickly and often runs on a normal outlet. When you compare saunas, read the temperature range each reaches alongside the heater it uses, because a headline maximum you cannot reach with the supplied heater in your cabin size is not a real number.
Questions people ask about sauna temperature
How hot should a sauna be?
A traditional sauna runs 160 to 200 Fahrenheit, an infrared sauna 120 to 150, and a steam room 110 to 120 at full humidity. Within the traditional range the right setting is personal; start lower and build up.
Why is an infrared sauna cooler than a traditional one?
Because it heats your body directly with radiant panels rather than heating the air, so it feels intense at a lower air temperature, which is also why it heats faster and often runs on a normal outlet.
Does a hotter sauna mean a better one?
No. Each type has its own correct range, and the humidity and session length matter as much as the temperature. A sauna you cannot bring to its rated heat because the heater is undersized for the cabin is the real problem to avoid.