Can You Wear an Apple Watch in a Sauna? The short answer? No, it's not recommended. While Apple Watches, including the rugged Apple Watch Ultra, are designed to be water-resistant, that doesn't mean they're built to handle the extreme heat and humidity of a sauna or steam room.
Do not use or take a smartwatch into a sauna! Do not take any device containing a lithium battery into a sauna. Not only is this incredibly dangerous because you can get burns from the metal casing heating up to the ambient temperature or the adhesive failing at that temperature, causing the watch to fall apart.
Most electronic devices are not designed to withstand the extreme conditions of a sauna. It's best to avoid using any electronic devices in such environments to prevent damage.
Recommended conditions for using and storing most Apple Watch models. Apple Watch is designed to work best in ambient temperatures between 32° to 95° F (0° and 35° C). You can store your Apple Watch in ambient temperatures between -4° and 113° F (-20° and 45° C).
What is the maximum temperature that an Apple Watch can tolerate? The Apple Watch operates safely at temperatures up to 95°F (35°C). Sauna temperatures exceed this limit and can damage the watch.
Don't swim with or otherwise submerge your AirPods. Don't put AirPods in the washing machine or dryer. Don't wear AirPods in a sauna or steam room. Don't expose AirPods to high-velocity water, such as while water skiing.
A 2019 study revealed that four 10-minute sauna sessions, interspersed with 5-minute cooldowns, led to a loss of 0.65 kg, primarily from water loss. An average of 73-134 calories burned in the sauna for 10 minutes was recorded, totaling a minimum of around 200 calories burned in an infrared sauna over 30 minutes.
The elevated heat within saunas often exceeds the recommended maximum operating temperature for phones. This poses as a threat to their functionality and longevity. The ideal temperature in a sauna can range from 80-90°C (176-194°F). That's well beyond what most phones are designed to endure.
Casio has designed a special heat-resistant, moisture-resistant watch that you can wear into a sauna. The coiled wristband mimics the locker key wristbands you get at a traditional Japanese onsen; this design stands off of your wrist, to avoid getting soaked with sweat.
Although a video chat or catching up on your favorite show may sound like a good idea while in an infrared sauna, your phone may overheat, and the high humidity can damage its internal components.
Keeping your Apple Watch and bands—as well as your skin—clean and dry maximizes comfort and prevents long-term damage to the watch. This is especially important after workouts or exposure to liquids such as sweat, soap, sunscreen, and lotions that can cause skin irritations.
Swim and shower with the Apple Watch
You can easily wear your Apple Watch when you go swimming in the sea or a pool or take a shower. You can only keep the Apple Watch Ultra on while diving, water skiing, or during other water activities. The water speed and depth would be too much for the other models.
It is recommended to remove your Garmin watch before entering a sauna or hot tub as these environments can expose your watch to high heat and moisture that may be outside of its operating specifications.
Can saunas help you lose belly fat? Studies show that several sauna sessions can help reduce body fat mass, BMI, and other body measurement parameters. However, it is not clear whether fat reduction targets belly fat.
Among other benefits, regular sauna use can help relax muscles, improve blood flow, and bolster skin health. The recommended length of time to spend in a sauna is 15-20 minutes. First-timers should start with five to 10 minutes. People with certain health conditions should not use a sauna.
Your Apple Watch, particularly the Apple Watch Ultra or any new Apple Watch series, is packed with delicate electronics that aren't designed to handle the kind of ambient temperatures found in saunas. The internal components could malfunction if they get too hot.
For example, it's been suggested that sitting in a sauna may help by reducing oxidative stress and inflammation, improving blood vessel function and beneficially activating different parts of the nervous system. These aren't the only suggested benefits of regular sauna use, by the way.
Apple advises against wearing your watch in environments where it could be exposed to extreme temperatures or steam, such as hot tubs or saunas. High temperatures and steam can affect the water-resistance seals and damage internal components.
Ambient temperature while you're wearing Apple Watch Ultra: -20° to 55°C (-4° to 130°F) Ambient temperature while Apple Watch Ultra is charging: 0° to 35°C (32° to 95°F)
Also avoid charging or leaving Apple Watch in hot environments, including direct sun exposure, for extended periods of time.