watchOS 10
See time spent in daylight
The ambient light sensor in your Apple Watch Ultra estimates how much time you spend outdoors in daylight each day. And for family members with a managed Apple Watch, you can also monitor how much time they spend in daylight—All Apple Watch Ultra models.
See your time in daylight
Open the Health app on your iPhone.
Tap Browse at the bottom right, then tap Other Data.
Tap Time in Daylight.
Turn off time in daylight
Open the Settings app
on your Apple Watch Ultra.Go to Privacy & Security > Health.
Tap Time in Daylight, then turn off Time in Daylight.
You can also open the Apple Watch app on your iPhone, tap My Watch, tap Privacy, then turn off Time in Daylight.