Your Apple Watch SE 3rd Gen lights up to the Apple logo, sits there, and never finishes booting. Or it shows the logo, goes black, then shows the logo again in a loop. This usually means watchOS 26 hit a snag during boot. Sometimes it's a botched firmware update, sometimes it's a corrupted app, sometimes it's just a one-time glitch that needs a quick restart.
The first thing to try is a force restart. On the Apple Watch SE 3rd Gen, hold the side button (the one below the Digital Crown) and the Digital Crown together for 10 seconds. Let go when the Apple logo reappears. Unlike a regular restart that takes a few seconds, this force restart cuts power entirely and gives the watch a clean start.
Force Restart the Watch
Press and hold the side button and the Digital Crown together for 10 full seconds. Keep holding even if the screen goes black halfway through. Release when you see the Apple logo. The watch should boot past the stuck logo within a minute.
If the watch makes it past the logo and into watchOS, you're done. The boot was probably a one-time hang from a background process. If it loops back to the logo, move to the next fix.
Charge It for 45 Minutes Before Trying Again
If the battery dropped to critically low during the boot loop, the watch may not have enough power to complete the boot sequence. The SE 3rd Gen supports fast charging for the first time, it goes from 0 to 80% in about 45 minutes on the included magnetic puck. A 15-minute top-up adds roughly 8 hours of use.
Place it on the Apple magnetic charging puck for at least 45 minutes. Third-party Qi chargers work but charge slower, so stick with the puck that came in the box. After charging, do another force restart with the side button and Digital Crown held for 10 seconds.
Unpair and Re-pair From the Watch App
If the force restart doesn't get past the logo, you can try unpairing the watch from your iPhone. This works best if the watch briefly connects between boot loops and still shows up in the Watch app. Open the Watch app on your iPhone running iOS 26 or later. Go to All Watches, tap the info button next to your SE 3rd Gen, and tap Unpair Apple Watch.
The phone backs up the watch data first (health data, settings, app layouts) and then sends the unpair command. Wait for the watch to show the pairing screen, then follow the prompts to set it up as a new watch or restore from the backup. This clears whatever corruption was stuck during boot.
Put the Watch Into Recovery Mode
If unpairing doesn't work because the watch won't connect at all, boot it into Recovery Mode. Keep the watch on the magnetic charger. Press and hold the side button. When the power off slider appears, drag it to turn the watch off completely. Then press and hold the side button again until you see the Apple logo. When the logo appears, continue holding the side button. After about 20 seconds, a screen appears saying Recovery Mode with instructions to open the Watch app on your phone.
Keep the watch on the charger during the entire recovery process. Open the Watch app on your iPhone and tap Update Watch. The phone downloads the latest watchOS 26 firmware and pushes it to the watch. This takes 20-40 minutes depending on your Wi-Fi speed. After the update finishes, the watch restarts and should boot past the logo.
Factory Reset Through Recovery Mode
If updating doesn't work, Recovery Mode can also perform a factory reset. In the Watch app on your iPhone, after it detects the watch in recovery, you'll see an option that says Restore Watch. This wipes all data on the watch, apps, settings, health data not yet synced. Only do this if the Update option failed.
Tap Restore Watch and confirm. The watch erases completely and reinstalls watchOS 26 from scratch. This takes 10-15 minutes. After it finishes, the watch boots to the initial pairing screen. Set it up from scratch or restore from the iCloud backup of your previous watch. Health data already synced to the Health app on your iPhone is safe.
Check If It's a Family Setup Issue
If you're using the SE 3rd Gen with Family Setup (for a child or elderly relative without their own iPhone), the boot loop can sometimes come from a failed configuration update. The SE 3rd Gen supports Family Setup, but requires an iPhone XS or later to manage it. If the watch is stuck during Family Setup provisioning, put it on the charger and set it aside for a few hours. Sometimes the configuration times out and the watch recovers on its own.
Force restart it after at least two hours of charging. If it boots to the setup screen, re-run Family Setup from the organizer's iPhone. If it still loops, unpair it from the organizer's Watch app and set it up fresh as a new Family Setup device.
One last thing: the SE 3rd Gen's 60Hz LTPO display can briefly stutter when transitioning to always-on mode, but that's a display artifact, it won't cause a boot loop. A boot loop stuck on the logo is always a software or power issue, not a display quirk.
