watchOS 5.3.10

watchOS

Version

5.3.10

Build ID

16U711

File Size

527.09 MB

Release Date

2026-03-24T18:34:58Z

Update Type

Normal release

Delta update - requires 5.1 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 2026-03-24T18:34:58Z. The update package is 527.09 MB. This is a delta (partial) update that requires 5.1 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 db3c4548becc5f7821475e0c4e55a37002774c33.zip.

Direct URL

https://updates.cdn-apple.com/2025FallFCS/patches/047-72989/992CD845-F900-4076-9608-8A653EE28B44/com_apple_MobileAsset_SoftwareUpdate/db3c4548becc5f7821475e0c4e55a37002774c33.zip