watchOS 5.3.10

watchOS

Version

5.3.10

Build ID

16U711

File Size

465.56 MB

Release Date

2026-03-24T18:36:11Z

Update Type

Normal release

Delta update - requires 5.1.3 installed first.

Download OTA

Looking for beta firmware? View beta builds for Apple Watch Series 4 (40mm) →

About This Update

watchOS 5.3.10 (build 16U711) is an official Apple over-the-air update for the Apple Watch Series 4 (40mm), released on 2026-03-24T18:36:11Z. The update package is 465.56 MB. This is a delta (partial) update that requires 5.1.3 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 08a9c41fca31e5fafe7abebf26e52401000f6bcc.zip.

Direct URL

https://updates.cdn-apple.com/2025FallFCS/patches/047-72972/3C1B838E-331E-4649-A08D-882797958C91/com_apple_MobileAsset_SoftwareUpdate/08a9c41fca31e5fafe7abebf26e52401000f6bcc.zip