watchOS 5.3.10

watchOS

Version

5.3.10

Build ID

16U711

File Size

84.22 MB

Release Date

2026-03-24T18:37:06Z

Update Type

Normal release

Delta update - requires 5.3.3 installed first.

Download OTA

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

About This Update

watchOS 5.3.10 (build 16U711) is an official Apple over-the-air update for the Apple Watch Series 4 (44mm, LTE), released on 2026-03-24T18:37:06Z. The update package is 84.22 MB. This is a delta (partial) update that requires 5.3.3 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 31d16966fb36b5bee67ab23352acdd4b5221f6f7.zip.

Direct URL

https://updates.cdn-apple.com/2025FallFCS/patches/047-73041/50E16146-DDB0-4C31-BB36-F714D3C6ECE2/com_apple_MobileAsset_SoftwareUpdate/31d16966fb36b5bee67ab23352acdd4b5221f6f7.zip