Apple Watch backs up automatically when your paired iPhone is nearby and plugged in

Your Apple Watch does not back up the way your iPhone does. Instead, it creates a backup automatically whenever your paired iPhone is connected to power and within Bluetooth range — usually while you sleep. You do not need to do anything to start this process. The backup includes your watch face settings, installed apps, health data, and passwords.

This automatic backup means your watch data is protected if the device is lost, stolen, or stops working. When you pair a new Apple Watch to the same iPhone, the backup restores automatically. However, the backup only works if your iPhone and watch are paired together — if you switch to a different iPhone, the old watch backup will not transfer.

Key Takeaways

  • Apple Watch backs up automatically when your iPhone is plugged in and nearby, so you do not need to manually start a backup.
  • The backup includes apps, watch faces, health data, and passwords, but only restores when you pair the watch to the same iPhone.
  • You can check that a backup exists by opening the Watch app on your iPhone and looking at the General settings.
  • If you are switching to a different iPhone, you must unpair your watch from the old phone first, then pair it to the new one to restore the backup.
  • Backups are stored on your iPhone, not in iCloud, so they are only available on that specific device.

Where your Apple Watch backup is stored

Your Apple Watch backup lives on your paired iPhone, not in iCloud. This means the backup is only available on that specific iPhone — if you lose your iPhone or switch to a different one, you cannot restore the watch backup from another device or computer. The backup takes up space on your iPhone's storage, though usually only 100 to 500 MB depending on how many apps you have installed.

Because the backup is tied to your iPhone, you cannot manually move it or upload it to iCloud yourself. Apple does not offer a way to back up your watch to a computer or external drive. If you want to preserve your watch data before selling or giving away your iPhone, you must keep both devices until you have paired the watch to a new iPhone and confirmed the backup restored correctly.

How to check if your Apple Watch backup exists

Open the Watch app on your iPhone and tap the General tab at the bottom. Scroll down and tap About. Look for the line that says "Backup" — if it shows a recent date and time, a backup exists. If it says "Never" or shows a date from months ago, your watch has not backed up recently.

If the backup date is old, make sure your iPhone is plugged into power and your watch is nearby with Bluetooth turned on. Leave them together for at least 10 minutes. Then check the About screen again. If the backup still does not update, restart both devices: hold the side button on your watch until the power-off slider appears, then turn it back on. Then restart your iPhone by holding the side button and volume button together.

What happens when you pair a new watch to your iPhone

When you set up a new Apple Watch with your existing iPhone, the setup process asks whether you want to restore from a backup. If you choose yes, the watch downloads your apps, watch faces, settings, and health data from the backup stored on your iPhone. This usually takes 5 to 15 minutes depending on how many apps you have. During this time, keep the watch and iPhone close together and plugged into power.

If you choose not to restore from a backup, you start with a blank watch and must reinstall apps and reconfigure settings manually. Health data from before the new watch setup will not appear on the new device — only data recorded after the setup completes. If you change your mind later, there is no way to restore the old backup, so choose carefully during setup.

Switching your watch to a different iPhone

To move your Apple Watch to a different iPhone, you must unpair it from the old phone first. Open the Watch app on your old iPhone, tap the Devices tab, select your watch, tap the info icon, and choose Unpair Apple Watch. You will be asked to enter your Apple ID password. This erases the watch and removes the backup from your old iPhone.

Once unpairing is complete, put on your new iPhone and open the Watch app. Tap the plus icon to start pairing. Hold your watch near the iPhone and follow the setup steps. When asked whether to restore from a backup, you will not see an option because the backup was erased when you unpaaired from the old phone. You will need to set up the watch as new and reinstall your apps. If you want to keep your old watch data, do not unpair until after you have confirmed the backup restored on the new iPhone.

Data that does and does not back up

Your Apple Watch backup includes installed apps, app data, watch faces and their settings, Siri shortcuts, passwords and payment cards, notification settings, and accessibility settings. It also includes some health data, though the most detailed health records are stored in the Health app on your iPhone rather than on the watch itself.

The backup does not include music or podcasts you have downloaded to the watch — you will need to re-read those after restoring. Cellular data and eSIM information do not back up either, so if your watch has cellular service, you will need to contact your carrier to reactivate it on a new device. Photos and messages stored on the watch are not backed up, though messages are usually still available through the Messages app on your iPhone.

What to do if your watch backup is not working

If your backup has not updated in several days, first check that your iPhone is set to back up automatically. Open the Watch app, tap the General tab, and scroll to Bluetooth. Make sure Bluetooth is turned on. Then plug your iPhone into power and keep your watch nearby for at least 30 minutes. If the backup still does not update, try restarting both devices.

If restarting does not work, unpair your watch and pair it again. This erases the watch and creates a new backup. Open the Watch app on your iPhone, tap Devices, select your watch, tap the info icon, and choose Unpair Apple Watch. Then start the pairing process again by tapping the plus icon in the Watch app. During setup, choose to restore from a backup if you want to keep your apps and settings. This process usually fixes backup problems that restart alone cannot solve.

Frequently Asked Questions

Can I back up my Apple Watch to my computer?

No. Apple Watch backups are stored only on your paired iPhone and cannot be manually saved to a computer, external drive, or iCloud. The backup happens automatically and is tied to that specific iPhone.

What happens to my watch backup if I sell my iPhone?

Before you sell your iPhone, unpair your watch from it. This erases the backup from your iPhone. If you want to keep your watch data, pair the watch to your new iPhone first and confirm the backup restored, then unpair from the old iPhone.

Can I restore a watch backup to a different iPhone model?

No. A watch backup can only restore to the same iPhone it was backed up from. If you switch to a different iPhone, you must set up your watch as new and cannot restore the old backup.

How much storage space does an Apple Watch backup take on my iPhone?

Most backups use between 100 and 500 MB of iPhone storage, depending on how many apps are installed on your watch. You can see the exact size by opening the Watch app, tapping the General tab, and checking the iPhone storage information.

Will my health and fitness data back up if I get a new watch?

Some health data backs up with your watch, but the most detailed records are stored in the Health app on your iPhone. When you restore a backup to a new watch, you will see historical data in the Health app, but activity rings and workout history may not fully transfer to the new device.