What Temperature Should a Sauna Be? Infrared vs Traditional Sauna Temperatures

A traditional sauna will typically operate at around 70–100°C, while an infrared sauna usually operates at a considerably lower air temperature of roughly 40–60°C.

The difference exists because the two types of sauna heat you differently. A traditional sauna heats the air and sauna stones around you, whereas an infrared sauna uses infrared radiation to transfer heat more directly to your body.

That means comparing the temperature displayed inside an infrared sauna with the temperature inside a traditional sauna isn't particularly useful. A lower number doesn't necessarily mean you're getting an inferior sauna experience.

Here's how sauna temperature actually works.

Sauna Temperature: The Quick Answer

For beginners, there's no reason to immediately aim for the top of either range. Start somewhere comfortable, keep your first sessions relatively short and gradually adjust the temperature as you learn how your body responds to heat.

What Temperature Should a Traditional Sauna Be?

A traditional sauna is commonly used somewhere between approximately 70°C and 100°C.

Many people will find somewhere around 80–90°C provides the experience they associate with a traditional Finnish-style sauna, although personal preference plays a major role.

Traditional saunas work by using a heater to warm the cabin, typically alongside sauna stones.

Unlike an infrared sauna, you're therefore sitting in very hot air.

Water can also be poured onto suitable heated sauna stones, producing a temporary burst of steam and increasing the perceived intensity of the heat.

This Finnish sauna tradition is known as löyly.

What Temperature Should an Infrared Sauna Be?

Infrared saunas generally operate at around 40–60°C.

That can sound surprisingly cool if you're accustomed to a traditional sauna running at 80°C or above.

But infrared saunas work differently.

Instead of relying primarily on extremely hot surrounding air, infrared heaters emit infrared radiation that transfers heat towards your body.

As a result, an indoor infrared sauna can provide a substantial heat experience without requiring the cabin air to reach traditional sauna temperatures.

This is one reason many people find infrared saunas comfortable for longer sessions.

Infrared vs Traditional Sauna Temperature

The biggest mistake when comparing infrared and traditional saunas is assuming that the hotter sauna must be the more effective sauna.

They're different methods of delivering heat.

A traditional sauna creates a very hot environment around your body.

An infrared sauna uses radiant energy to transfer heat towards you while operating at a considerably lower ambient air temperature.

So an infrared sauna reaching 55°C isn't failing because a traditional sauna can reach 90°C.

They're not designed to reach the same temperature.

If you're deciding between them, temperature should therefore be viewed as a difference in experience rather than a simple measure of performance.

Is 60°C Hot Enough for a Sauna?

For an infrared sauna, yes. For a traditional sauna, 60°C would generally be considered relatively cool.

This is a perfect example of why sauna type matters when discussing temperature.

An infrared sauna operating around 50–60°C can be functioning exactly as intended.

A traditional Finnish-style sauna, meanwhile, would ordinarily be used at a substantially higher air temperature.

So if someone tells you that their sauna is set to 55°C, you need to know what type of sauna they're using before the number tells you very much.

Is 80°C a Good Sauna Temperature?

80°C is a common temperature for a traditional sauna and sits comfortably within the normal operating range for Finnish-style sauna bathing.

For many users, it provides a good balance between substantial heat and a temperature at which they can still relax.

For someone completely new to traditional sauna, however, there's nothing wrong with starting lower.

Sauna isn't a competition to see who can tolerate the highest number.

Is 100°C Too Hot for a Sauna?

Traditional saunas can operate around 100°C, particularly for experienced sauna users, but that doesn't mean everyone should use one at that temperature.

The experience at 100°C can be considerably more intense than at 70–80°C, particularly when humidity increases.

Someone new to sauna should generally become accustomed to heat progressively rather than immediately chasing the maximum temperature their heater can produce.

Hotter isn't automatically better.

Why Does Humidity Make a Sauna Feel Hotter?

Temperature is only part of the sauna experience.

Humidity can dramatically change how hot a traditional sauna feels.

When water is poured onto heated sauna stones, it creates a temporary increase in humidity.

Higher humidity reduces how effectively sweat can evaporate from your skin. Because evaporation is one of the body's cooling mechanisms, the sauna can suddenly feel significantly hotter even though the air-temperature reading hasn't changed much.

This is why two sessions at exactly the same temperature can feel completely different.

A dry 80°C sauna and an 80°C sauna immediately after water has been poured onto the stones don't necessarily feel like the same environment.

Where You Sit in a Sauna Matters Too

Here's another reason a single temperature reading doesn't tell the whole story.

Hot air rises.

The upper part of a traditional sauna will therefore generally be hotter than the lower part of the cabin.

That's also why traditional saunas often use tiered benches.

If the top bench feels too intense, moving lower can provide a noticeably different experience without changing the heater setting.

Conversely, an experienced sauna user may prefer sitting higher where the air is hotter.

What Sauna Temperature Is Best for Beginners?

There isn't a universal beginner temperature because people tolerate heat differently.

A sensible principle is to start towards the lower end of the normal operating range for your type of sauna and increase gradually.

For a traditional sauna, that might mean beginning around 65–75°C rather than immediately trying 90–100°C.

For an infrared sauna, you might begin around 40–50°C and adjust from there.

Your first sessions can also be shorter.

There's no prize for lasting 30 minutes on your first attempt.

Five or ten comfortable minutes followed by a proper cool-down is a much more sensible introduction than staying inside until you feel unwell simply because someone online told you they sauna for half an hour.

How Long Should You Stay in a Sauna?

Session length depends on temperature, sauna type, experience and individual heat tolerance.

As a general principle, higher temperatures usually mean shorter comfortable sessions.

Someone using a traditional sauna at 90°C may therefore choose a considerably shorter session than someone relaxing in an infrared cabin at 50°C.

Rather than aiming for an arbitrary time target, pay attention to how you feel.

If you become dizzy, nauseous, unusually weak or excessively uncomfortable, leave the sauna and cool down.

Hydration matters too, particularly if you've already been exercising and sweating before entering the sauna.

How Long Does a Sauna Take to Heat Up?

This depends heavily on the type and size of sauna, heater output, insulation and ambient temperature.

Infrared saunas generally become usable relatively quickly because they don't need to heat the cabin air to 80–100°C.

For example, KOVE's smaller indoor infrared saunas can be ready to use in around 15 minutes.

Traditional outdoor saunas generally require more time because the heater needs to warm the cabin and sauna stones to a much higher temperature.

As a practical example, KOVE's outdoor barrel saunas typically take around 45 minutes to heat, although outdoor temperature and conditions will affect this.

Does Outdoor Temperature Affect a Sauna?

Yes.

An outdoor sauna sitting in a British garden in January is starting from a very different temperature from the same sauna on a warm summer afternoon.

Ambient temperature, insulation, cabin volume and heater output all influence how quickly an outdoor sauna reaches the desired temperature and how effectively it maintains it.

This is why matching the heater correctly to the size of the sauna matters.

A heater that's too small for the cabin may struggle to reach the desired temperature, particularly in cold conditions.

KOVE's traditional outdoor range includes both barrel saunas and cube saunas in different sizes, with heaters matched to the volume of the individual sauna.

What About Portable Saunas?

Portable sauna products shouldn't automatically be judged against the air temperature of a permanent traditional sauna cabin either.

Products such as infrared sauna tents, steam sauna tents and sauna blankets use different methods to create heat.

The relevant operating temperature therefore depends on the product rather than a universal definition of the "correct" sauna temperature.

If space or installation is a concern, you can explore KOVE's portable sauna range as an alternative to a permanent cabin.

Is a Hotter Sauna Better?

No. A hotter sauna isn't automatically a better sauna.

Once you're within an appropriate operating range, the best temperature is largely the one that allows you to use the sauna comfortably and consistently.

Setting the thermostat to maximum simply because the sauna can reach that temperature isn't necessary.

The same principle applies across recovery equipment.

An ice bath doesn't become automatically better because you've made the water colder, and a sauna doesn't become automatically better because you've made the air hotter.

Consistency and sensible use matter more than chasing extreme numbers.

Sauna Temperature vs Ice Bath Temperature

Combining sauna and cold-water immersion creates a dramatic temperature contrast, which is one reason home hot-and-cold setups have become so popular.

But neither side needs to be extreme.

If you're using a cold plunge regularly, an ice bath chiller gives you considerably more control than relying on outdoor temperatures or repeatedly adding bags of ice.

That means you can find a water temperature you personally tolerate and reproduce it each time, in much the same way that you find a preferred sauna temperature.

Sauna Temperature FAQs

What temperature should a sauna be in Celsius?

A traditional sauna typically operates at approximately 70–100°C, while an infrared sauna generally operates at around 40–60°C. The appropriate temperature depends on the type of sauna and your personal heat tolerance.

What temperature should an infrared sauna be?

Infrared saunas typically operate at around 40–60°C. They use radiant infrared heat rather than relying primarily on extremely hot surrounding air, so they don't need to reach traditional sauna temperatures.

What temperature should a traditional sauna be?

Traditional Finnish-style saunas commonly operate somewhere around 70–100°C, with many users preferring approximately 80–90°C.

Is 70°C hot enough for a sauna?

Yes. 70°C sits within the normal range for a traditional sauna and can be particularly suitable for someone who prefers gentler heat or is relatively new to sauna bathing.

Is 90°C too hot for a sauna?

90°C is within the normal operating range of many traditional saunas, but whether it's comfortable depends on your experience, session duration and humidity. Beginners may prefer to start considerably lower.

Why is an infrared sauna cooler than a traditional sauna?

Infrared saunas use infrared radiation to transfer heat towards your body rather than relying primarily on heating the surrounding air. They can therefore operate at substantially lower air temperatures than traditional saunas.

How long does a sauna take to heat up?

It depends on sauna type, cabin size, heater output, insulation and ambient temperature. Infrared saunas can become usable relatively quickly, while traditional outdoor saunas generally require longer to heat the cabin and sauna stones.

Should I use the hottest setting on my sauna?

No. Maximum temperature isn't the objective. Use a temperature that provides a comfortable heat experience you can tolerate safely and consistently.

The Bottom Line

If you only remember one thing, make it this:

A traditional sauna typically operates at around 70–100°C, while an infrared sauna usually operates at around 40–60°C because the two technologies heat you differently.

Don't judge an infrared sauna by traditional sauna temperatures, and don't assume hotter automatically means better.

Start comfortably, increase the heat gradually and find the temperature that makes sauna something you actually want to use regularly.

If you're deciding which type suits your home, you can compare KOVE's indoor infrared saunas, outdoor barrel saunas, outdoor cube saunas and portable saunas.

And if you're not sure which option is right for your space, just ask us. We'd much rather help you choose the right setup than sell you the wrong one.