watchOS 5.3.10

watchOS

Version

5.3.10

Build ID

16U711

File Size

73.3 MB

Release Date

2026-03-24T18:36:30Z

Update Type

Normal release

Delta update - requires 5.3.1 installed first.

Download OTA

Looking for beta firmware? View beta builds for Apple Watch Series 4 (44mm) →

About This Update

watchOS 5.3.10 (build 16U711) is an official Apple over-the-air update for the Apple Watch Series 4 (44mm), released on 2026-03-24T18:36:30Z. The update package is 73.3 MB. This is a delta (partial) update that requires 5.3.1 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 7a72b3c1497472bba54b7e69e0516d5b91965ddd.zip.

Direct URL

https://updates.cdn-apple.com/2025FallFCS/patches/047-72915/CAE2825C-8659-4EF4-AD2D-20F28466A6CF/com_apple_MobileAsset_SoftwareUpdate/7a72b3c1497472bba54b7e69e0516d5b91965ddd.zip