watchOS 5.3.10

watchOS

Version

5.3.10

Build ID

16U711

File Size

102.23 MB

Release Date

2026-03-24T18:35:14Z

Update Type

Normal release

Delta update - requires 5.3.9 installed first.

Download OTA

Looking for beta firmware? View beta builds for Apple Watch Series 3 (42mm, LTE) →

About This Update

watchOS 5.3.10 (build 16U711) is an official Apple over-the-air update for the Apple Watch Series 3 (42mm, LTE), released on 2026-03-24T18:35:14Z. The update package is 102.23 MB. This is a delta (partial) update that requires 5.3.9 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 8b6e938eb825dcd1b6f9b1636ffb62da5bec4bd8.zip.

Direct URL

https://updates.cdn-apple.com/2025FallFCS/patches/047-73026/D8D48644-7AD8-46E5-B78B-20BEFF74BC84/com_apple_MobileAsset_SoftwareUpdate/8b6e938eb825dcd1b6f9b1636ffb62da5bec4bd8.zip