Certain Apple Watch models can track the water temperature, time, and depth during underwater activities like snorkeling, underwater pool swims, and shallow free-diving. (Not available on Apple Watch SE 3 and Apple Watch Series 9.)

There are depth limits, though. Apple Watch Series 10 and later can go to 6 meters (20 feet), and Apple Watch Ultra models to 40 meters (130 feet). You can also use a compatible third-party dive app.

WARNING: Underwater activities are risky. The Depth app is not a dive computer and does not provide decompression stop information, gas analysis, or other recreational scuba diving functionality. In situations where the failure of the device could lead to death, personal injury, or severe environmental damage, always use a secondary depth gauge and timer/watch.

Depth app overview

The Depth app provides basic information that’s easy to view during recreational underwater activities like snorkeling, underwater pool swims, and shallow free-diving.

Important: When using the Depth app, do not exceed the following maximum depth limits:

• Apple Watch Series 10 and later: 6 meters (20 feet)
• Apple Watch Ultra models: 40 meters (130 feet)

The Depth app is not a substitute for a dive computer. Before going on a dive, be sure your watch is free of cracks or other damage.

Check that the depth gauge and seals on your Apple Watch are working properly.

The Depth app shows all of the following on a single screen:

• Current time
• Current depth and maximum depth
• Time you’ve been underwater
• Water temperature

Diving specifications for Apple Watch Ultra models

• Maximum depth of operation: 40 meters (130 feet)

  Note: Apple Watch Ultra models are designed to comply with EN 13319. Beyond 40 meters in depth, some functions may stop working or work intermittently.

• Depth when dive time counting starts and stops: 1 meter (3 feet)
• Underwater operating temperature range: 0 to 40 °C (32 to 104 °F)
• Accuracy of depth sensor: ±1 meter
• Usability above sea level: The Depth feature is functional above sea level and dynamically compensates for altitude before dives.
• Non-operational storage temperature: –20 to 45 °C (–4 to 113 °F)
• Inspection interval: Depth and dive time accuracy don’t require rechecking at fixed intervals. However, if Apple Watch is damaged or malfunctions, contact Apple or an Apple Authorized Service Provider.

Begin and end your dive

1. Begin the dive with one of the following methods:
   • Manually: Before you go into the water, open the Depth app.
   • Action button: (supported on Apple Watch Ultra models) If you’ve set the Action button to Dive, press the Action button to start the dive.
   • Automatically: If you turned on Auto-Launch, the Depth app starts tracking a dive when your depth exceeds 1 meter and you’re submerged for more than 5 seconds.

   When submerged, the screen locks and Water Lock is turned on. In the Depth app, screen taps and Digital Crown presses don’t register. Third-party diving apps may allow you to interact with Apple Watch Ultra while underwater by turning the Digital Crown or pressing the Action button.

2. After you surface, end the dive session and turn off Water Lock (which clears water from the speaker) with one of the following methods:
   • Manually: Press and hold the Digital Crown.
   • Action button: (supported on Apple Watch Ultra models) If you’ve set the Action button to Dive, press the Action button to end the dive.
   • Automatically: The dive ends when Apple Watch has been out of the water for 10 minutes.

   If you descend again within 10 minutes without ending the dive, your time underwater is added to the previous time you were submerged and is logged as a single dive.

WARNING: Don’t switch to a different diving app within 48 hours of your last dive. Different diving apps, including the Depth app, may not share dive data and thereby may miscalculate critical parameters like tissue load. Failure to follow the warning may result in decompression sickness.

Third-party dive apps

You can install a compatible third-party app that can function as a dive computer at depths of 6 meters or less for Apple Watch Series 10 and later (excluding Apple Watch SE 3), and 40 meters or less for Apple Watch Ultra models. Refer to the third-party app documentation to understand how to use the app and the warnings associated with the app.

WARNING: Underwater activities are risky. To reduce the risk of serious or fatal injury, read and follow all instructions and warnings in this guide and those provided by any third-party dive apps you’re using, and when recreational scuba diving, always follow all guidelines associated with the certifications and training you have received.

WARNING: Always use a secondary depth gauge and timer/watch, as well as decompression tables.

Magnets in all Apple Watch models can affect the accuracy of an external compass. If you’re using another compass during activities such as diving, hiking, or navigating, keep it separated from Apple Watch when reading the external compass.

WARNING: Apple Watch Ultra models should only be used by trained divers for recreational dives of 130 feet (40 meters) or less. Always follow diving safety protocols and dive with a buddy. Check functionality regularly during a dive, and ascend safely if there is any apparent malfunction. There is always a risk of decompression sickness (DCS) with any dive. Seek immediate medical treatment if you think you may be experiencing DCS.

See also

• Log your underwater activity with the Depth app on Apple Watch
• Configure the Depth app on Apple Watch

You can customize your preferences for the Depth app in Settings. (Supported on all Apple Watch Ultra models, Apple Watch Series 10, and later—excluding Apple Watch SE 3.)

You can choose depth and temperature units, set the Depth app to open automatically or manually, and configure the Action button to start a dive. You can also make these changes in the Apple Watch app on your iPhone.

Here’s how to configure the Depth app on Apple Watch.

Choose depth and temperature units

1. Start the Settings app on your Apple Watch.
2. Tap Depth, then choose depth units (Meters or Feet) and temperature units (Celsius or Fahrenheit).

You can also go to the Apple Watch app on your iPhone, tap My Watch, tap Apps, then tap Depth.

Set the Depth app to open automatically or manually

1. Start the Settings app on your Apple Watch.
2. Tap General, then tap Auto-Launch.
3. Below When Submerged, choose one of the following:
   • Off: Start a dive manually by opening the Depth app or pressing the Action button (available on Apple Watch Ultra models).
   • Selected App: Automatically opens the Depth app. (To open a compatible third-party app instead, tap App, then choose the app.)
   • Remain on Watch Face: Monitor your dive by adding complications to the watch face.

You can also go to the Apple Watch app on your iPhone, tap My Watch, tap General, tap Auto-Launch, then choose an option below When Submerged.

Configure the Action button to start a dive (available on Apple Watch Ultra models)

1. Go to the Settings app on your Apple Watch Ultra.
2. Press Action Button, tap Action, and then choose Dive.
3. Tap the Back button and tap App. Then choose the Depth app or a compatible third-party app.

See also

• Log your underwater activity with the Depth app on Apple Watch

On certain Apple Watch models, you can see summaries of your underwater activities in the Depth app. You can also review the summaries in the Fitness app on your iPhone.

You can log almost any underwater activity, from swimming below the surface at the local pool to going on a scuba adventure, as long as you go deeper than 1 meter for more than 5 seconds. The Depth app is supported on the following:

• Apple Watch Ultra models to a maximum depth of 40 meters (130 feet)
• Apple Watch Series 10 and later (excluding Apple Watch SE 3) to a maximum depth of 6 meters (20 feet)

WARNING: The Depth app is not a dive computer and does not provide decompression stop information, gas analysis, or other recreational scuba diving functionality.

What counts as a dive?

You can log almost any underwater activity. That includes swimming below the surface at the local pool, snorkeling and diving down to explore a reef, or going on a scuba adventure.

Your dive is tracked under the following conditions:

• You use the Depth app or a third-party app that supports underwater activity tracking.
• Your depth exceeds 1 meter and you’re submerged for more than 5 seconds.

A logged dive can be a single dive, like a scuba dive, or a series of dives aggregated together. That happens, for example, when you’ve submerged multiple times at the pool to work on your breath control.

Begin your dive

Use one of the following methods:

• Manually: Before you go into the water, open the Depth app.
• Action button: (supported on Apple Watch Ultra models) If you’ve set the Action button to Dive, press the Action button.
• Automatically: If you turned on Auto-Launch, the Depth app starts tracking a dive when your depth exceeds 1 meter and you’re submerged for more than 5 seconds.

When submerged, the screen locks and Water Lock is turned on. In the Depth app, screen taps and Digital Crown presses don’t register. Third-party diving apps may allow you to interact with Apple Watch Ultra while underwater by turning the Digital Crown or pressing the Action button.

End a dive

After you surface, end the dive session and turn off Water Lock (which clears water from the speaker) with one of the following methods:

• Manually: Press and hold the Digital Crown.
• Action button: (available on Apple Watch Ultra models for dives longer than 3 minutes) If you’ve set the Action button to Dive, press the Action button to end the dive.
• Automatically: The dive ends when Apple Watch has been out of the water for 10 minutes.

  Note: If you descend again within 10 minutes, your time underwater is added to the previous time you were submerged and is logged as a single dive.

View your recent dives on your Apple Watch

Apple Watch stores a dive summary for 7 days before automatically deleting it.

1. Start the Depth app on your Apple Watch.
2. Tap View Recent Dives.
3. To see more details, tap a dive.

   You can see the date and time the dive started, the maximum depth, and the amount of time underwater.

View your dive history in the Fitness app on iPhone

Your dive summaries from the Depth app appear alongside those created by third-party dive apps, so you can see them all.

1. Start the Fitness app on your iPhone.
2. In the Summary tab, tap Sessions, then tap Dives.
3. Tap a dive to see such details as maximum depth, underwater time, water temperature, and more.

To delete a dive, swipe left on the dive, then tap Delete.

See also

• Configure the Depth app on Apple Watch
• Measure underwater temperature, duration, and depth on Apple Watch