watchOS 5.3.10

watchOS

Version

5.3.10

Build ID

16U711

File Size

494.73 MB

Release Date

2026-03-24T18:32:55Z

Update Type

Normal release

Delta update - requires 5.0 installed first.

Download OTA

Looking for beta firmware? View beta builds for Apple Watch Series 2 (38mm) →

About This Update

watchOS 5.3.10 (build 16U711) is an official Apple over-the-air update for the Apple Watch Series 2 (38mm), released on 2026-03-24T18:32:55Z. The update package is 494.73 MB. This is a delta (partial) update that requires 5.0 to already be installed on the device - it cannot be applied from scratch. This update is currently signed by Apple, so it can be applied directly from Settings › General › Software Update.

The OTA payload file is c509d28ba6e77053221cf72f98b344f728262810.zip.

Direct URL

https://updates.cdn-apple.com/2025FallFCS/patches/047-73049/B4D9E830-751E-47ED-9BED-8034AC37F403/com_apple_MobileAsset_SoftwareUpdate/c509d28ba6e77053221cf72f98b344f728262810.zip