Yes, you can swim with most Fitbits, but the model matters
Most current Fitbit models are water-resistant enough for swimming and snorkeling, but not all of them. Water-resistant means the device can handle splashes and brief submersion; waterproof means it can survive extended time underwater. Fitbit uses the term "water-resistant" because no consumer wearable is truly waterproof indefinitely.
The Fitbit Charge 6, Fitbit Sense 2, Fitbit Inspire 3, and Fitbit Ace LTE are all rated to 50 meters of water resistance, which covers swimming in pools and open water. The Fitbit Versa 4 also reaches 50 meters. Older models like the Charge 5 and Sense 1 have the same rating. However, the Fitbit One, Fitbit Zip, and some older Charge models are not water-resistant and should not go near a pool.
Check your device's spec sheet or the Fitbit app under device details to confirm your model's water-resistance rating before you swim. If you see "3 ATM" or "5 ATM" listed, those are equivalent to roughly 30 meters and 50 meters of water resistance respectively.
Key Takeaways
- Fitbit models rated to 50 meters of water resistance can be worn while swimming in pools and open water without damage.
- Water-resistant does not mean waterproof; extended saltwater exposure or diving deeper than the rated depth can cause leaks.
- Your Fitbit will track swim workouts automatically if you set the exercise mode to "Swimming" before you enter the water.
- Rinse your Fitbit with fresh water after swimming in a pool or ocean to remove chlorine and salt, which can corrode the seals over time.
- Do not wear your Fitbit in a hot tub, sauna, or shower with very hot water, because heat can damage the battery and seals even if the device is water-resistant.
How Fitbit tracks your swimming
When you wear a water-resistant Fitbit into the pool, the device does not automatically know you are swimming. You have to tell it. Open the Fitbit app, tap the exercise icon, and select "Swimming" or "Pool Swimming" before you start. Some models also let you hold down the button on the device itself to start an exercise mode, though the app is more reliable.
Once you start the swimming workout, your Fitbit will count laps if you are using a pool with a known length. The device uses motion sensors to detect when you complete a lap and flip at the wall. In open water, it tracks distance based on your arm movement and pace, which is less precise than pool tracking but still useful for logging the workout.
Your Fitbit will record calories burned, duration, and distance. Heart rate tracking works underwater on some models, though the optical sensor may be less accurate when wet. After you finish, the workout syncs to the app and counts toward your daily activity goals.
Water resistance ratings explained
Fitbit uses the ATM (atmosphere) rating system, which measures how much water pressure a device can withstand. One ATM roughly equals the pressure at sea level, so 3 ATM means the device can handle the pressure of about 30 meters of water depth. A 5 ATM rating covers 50 meters.
The rating assumes static pressure — you holding the device still underwater — not dynamic pressure from diving, jumping, or fast water movement. Splashing, showering, and swimming all involve dynamic pressure, which is why Fitbit recommends against wearing water-resistant devices in hot tubs or saunas even though the temperature is the real threat, not the water itself.
Water resistance degrades over time as seals wear out. A device rated to 50 meters today may not be safe for swimming in two years. If your Fitbit is more than three years old and you swim regularly, consider having it inspected or replaced if you notice any cracks in the case or fogging under the screen.
Saltwater, chlorine, and how to care for your device
Chlorine and salt are corrosive to the seals and metal contacts on your Fitbit. After swimming in a pool or ocean, rinse your device under fresh running water for 10 to 15 seconds. Use your fingers or a soft cloth to gently wipe away any visible residue. Do not use soap, rubbing alcohol, or abrasive materials.
Dry the device with a soft, lint-free cloth before you wear it again. If water gets trapped under the screen or in the charging port, leave the device in a warm, dry place for a few hours. Some people place their Fitbit near (not on) a radiator or in a dry closet overnight. Do not use a hair dryer or direct heat source, which can damage the battery.
If you swim regularly — more than once a week — rinse your Fitbit after every session. This habit extends the life of the seals and prevents corrosion that can eventually cause leaks. Even water-resistant devices are not designed to be submerged constantly; they are designed to survive occasional water exposure.
When not to wear your Fitbit in water
Do not wear your Fitbit in a hot tub, sauna, steam room, or very hot shower. Heat is the real enemy of water-resistant devices. The battery, seals, and adhesives inside are designed for body temperature and room-temperature water, not sustained heat above 40°C (104°F). Hot water can cause the seals to expand and contract, creating gaps where water leaks in.
Avoid wearing your Fitbit while diving or snorkeling deeper than the rated depth. A 50-meter rating is a safety margin, not a target. Diving to 40 meters with a 50-meter device is risky. If you are a diver, consider a dedicated dive computer instead.
Do not submerge your Fitbit if the screen is cracked, the case is visibly damaged, or water is already trapped inside. Attempting to use a damaged device in water will cause more water to enter and may permanently ruin the electronics.
Syncing your swim data after you get out
Your Fitbit stores the swim workout in its memory even if the device is wet. Once you dry it off and the screen is clear, open the Fitbit app on your phone. The app will sync automatically if Bluetooth is on and your phone is nearby. The swim workout will appear in your activity log with distance, duration, calories, and lap count.
If the sync does not happen automatically, open the app and pull down on the screen to force a manual sync. Make sure your Fitbit is fully charged and within 30 feet of your phone. If you still see no data, restart both the device and the app by closing it completely and reopening it.
Swim workouts count toward your daily activity goals and weekly exercise minutes. If you swim regularly, you can set a custom goal for swimming distance or duration in the app settings.
Frequently Asked Questions
Can I wear my Fitbit in the shower?
Yes, if your model is water-resistant. A regular shower at normal temperature is fine. Avoid very hot showers, steam showers, or standing directly under a showerhead for extended periods. The combination of heat and sustained water pressure can stress the seals. Rinse it with fresh water and dry it afterward if you use soap or shampoo.
What happens if water gets inside my Fitbit?
If you see fogging under the screen or water droplets inside the case, stop wearing the device when ready. Place it in a warm, dry location for 24 to 48 hours. Do not charge it or try to use it. If the fogging does not clear or if the device stops working, contact Fitbit support about repair or replacement options.
Will swimming damage my Fitbit's battery?
No, water does not damage the battery itself. However, heat does. Avoid hot tubs and very hot showers, which can degrade the battery faster than normal use. Regular swimming in cool pools will not harm the battery.
Can I track open water swimming as accurately as pool swimming?
Pool swimming is more accurate because your Fitbit counts laps by detecting your flip at the wall. In open water, the device estimates distance based on arm motion and pace, which is less precise. For training purposes, pool tracking is more reliable.
Do I need to remove my Fitbit before jumping into a pool?
No, if your model is rated to 50 meters of water resistance. The impact of jumping in is not a problem. However, avoid diving or jumping from heights greater than a few feet, as the sudden pressure change can stress the seals.