Do I need to lock Apple Watch 7 before swimming?
Start a swimming workout
To pause or resume your swim, press the Digital Crown and side button at the same time. When you start a swimming workout, your Apple Watch automatically locks the screen with Water Lock to avoid accidental taps.
- Open the Workout app.
- Scroll to Pool Swim or Open Water Swim. ...
- Tap to start the workout or tap the more button. ...
- For Pool Swim, turn the Digital Crown to set the pool length. ...
- Wait for the three-second countdown.
Apple officially states that the Apple Watch is water resistant with a rating of IPX7, which means the watch can be submerged at depths up to 1 meter for up to 30 minutes.
It will try to measure your heart rate.
Just don't expect the results to be perfectly accurate. Water inevitably slides between your watch and your wrist, making detection difficult. Apple themselves note that this feature doesn't work that well (“Water might prevent a heart-rate measurement”).
Apple Watch Series 7 has a water resistance rating of 50 meters under ISO standard 22810:2010. This means that it may be used for shallow-water activities like swimming in a pool or ocean.
Like every model of Apple Watch since the Series 2, the Series 7 boasts a WR50 rating, which means it's water-resistant up to 50 meters (about 164 feet) below the surface.
The watch uses the gyroscope and accelerometer to track the motion of your strokes, but in open water, it can leverage another sensor: the GPS chip. If you're swimming in the ocean or a lake, your watch uses that to determine how fast and how far you go.
On your iPhone, open the Apple Watch app. Tap the My Watch tab, then tap Privacy > Reset Fitness Calibration Data.
Apple Watch Series 3 can be worn in a pool. After swimming (or otherwise exposing it to anything other than fresh water), be sure to clean your Apple Watch by gently rinsing it with warm tap water. The watch and band should also then be dried using a soft, lint-free cloth.
Short answer: No. Locking the screen has no impact on how waterproof your watch is.
Can the Apple Watch eject water?
How to turn off Water Lock and eject water. Press and hold* the Digital Crown on the side of your Apple Watch until the display says Unlocked. A series of tones will play to clear any water that remains in the speaker. After this, you can use your display as usual.
No - Apple Watch Series 2 remains equally water resistant regardless of whether or not Water Lock is turned on. Water Lock for Apple Watch Series 2 models prevents accidental screen interactions during exposure to water and also expels any water from the speaker afterwards.

Water Lock also turns on automatically when you begin a water-based workout, such as swimming or surfing.
Short answer: No. Locking the screen has no impact on how waterproof your watch is.
No need to lock it up. Just jump into the water and enjoy. The only point is that touch screen becomes innefective because of water.
The answer is no, but you can use it for shallow-water activities, including swimming. Apple Watch Series 2, 3, 4, 5, and 6 have a water resistance rating of up to 50 meters (164 feet) of depth under ISO standard 22810:2010. To learn more about using the Apple Watch, sign up for our free Tip of the Day newsletter.
Using a feature called Water Lock, your Watch (Series 2 or later) will automatically lock its screen if its activity monitor senses that you're swimming or if you tell it you're starting a swimming workout.
- All movements of the arms should be simultaneous. ...
- Hands must get pushed forward together from the breast, on, under, or over the water.
- Elbows must be under the water except for the final stroke before the turn. ...
- Both hands must get brought back on or under the surface of the water.
The red dot icon indicates that you've received a notification. Swipe down on the watch face to read it. Learn more about notificatons on your Apple Watch. An app on your Apple Watch has used Location Services recently.
The water drop icon on your Apple Watch means that the Water Lock feature has been enabled. Water Lock temporarily locks your Apple Watch screen while in water, protecting it from damage.
Do I have to do anything before putting my Apple Watch in water?
But with most Apple Watch models, you don't have to worry about getting it a little wet while washing your hands or if you forget to take it off before jumping into a swimming pool. Heck, all of the newer models can withstand saltwater. It even has a fancy water ejection feature that's downright fun to use.
To pause your swim, press the Digital Crown and side button at the same time. To resume your swim, press the Digital Crown and side button again.
Question: Q: Can the crown and button be pressed while wet or under water? Can I press the crown and button of the watch series 3 while wet or under water? Yes, they can.