Short answer: you should not wear a Fitbit in the sauna. Take your Fitbit off before using a sauna: Google/Fitbit advises against sauna and hot-tub use. For a steam room, our precautionary recommendation is also to leave it outside rather than infer approval from water resistance. [1]
This guide separates the manufacturer’s advice from SaunaHelper’s practical recommendations. It does not claim that every visit will damage a device, and it does not certify any Fitbit or other watch for sauna use.
What does the manufacturer say?
Charge, Inspire, Versa, Sense and Luxe appear in the manufacturer’s water-resistance information. That page separately advises against sauna use; swimming ratings do not establish an exception. [1]
For the exact model you own, consult its current user manual as well as the general support guidance. Check the generation, not just the family name. [2]
Traditional sauna, infrared sauna or steam room?
| Setting | Practical choice | Basis |
|---|---|---|
| Traditional sauna | Leave the Fitbit outside. | Manufacturer’s general sauna guidance. |
| Infrared sauna | Leave it outside; do not invent a lower-temperature exception. | No infrared exception is established by the cited general guidance. |
| Steam room | Leave it outside as a precaution. | SaunaHelper recommendation; a swimming rating does not establish steam-room approval. |
The steam-room row is our precaution, not a quoted manufacturer ban. [1]
Why we do not recommend a towel or temperature workaround
Wrapping a tracker, drying it repeatedly or taking breaks does not provide evidence of manufacturer approval. This guide therefore offers no “safe number of minutes” or temperature threshold for those workarounds.
Likewise, a video of somebody else’s watch surviving heat is not a basis for recommending that device to you. We are not replacing one unsupported recommendation with another.
Already wore your Fitbit in the sauna?
Leave the heat and let the device return to room temperature before using or charging it. Do not charge it while wet. If it feels hot or causes a burning sensation, remove it immediately. Stop using a visibly damaged device or one with a suspected swollen battery and contact support. [2]
If you are unsure whether the device is damaged, use the official support route rather than trying another sauna session as a test.
Record the visit without wearing a tracker
If your goal is simply to remember your visits, note the date and duration outside the hot room. You can keep that note separate from an exercise entry. This article does not assign calories to sauna minutes or provide a heat-exposure target based on a watch reading.
For more background on the environment itself, see our sauna temperature guide and infrared-versus-traditional comparison. Neither guide is a device approval.
Bottom line
Keep the decision simple: follow the current Fitbit instructions, do not wear your Fitbit in the sauna, and avoid unsupported heat-resistance tricks. A useful sauna visit does not require wearing a fitness tracker.
Sources
- Google/Fitbit, Swim or shower with your Fitbit device, accessed 05.09.2026
- Google/Fitbit, How do I safely use my Fitbit watch or tracker?, accessed 05.09.2026
Editorial note: Manufacturer-source review, not a hands-on sauna test. Do not add a named tester or medical reviewer unless that person actually performed the stated work. A published review date is added only when the later approved review/publication is complete.