watchOS 5.3.10

watchOS

Version

5.3.10

Build ID

16U711

File Size

109.8 MB

Release Date

2026-03-24T18:34:45Z

Update Type

Normal release

Delta update - requires 5.3.2 installed first.

Download OTA

Looking for beta firmware? View beta builds for Apple Watch Series 3 (38mm, LTE) →

About This Update

watchOS 5.3.10 (build 16U711) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm, LTE), released on 2026-03-24T18:34:45Z. The update package is 109.8 MB. This is a delta (partial) update that requires 5.3.2 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 31bf09f5052bff9fd4316fa02031bc3b0ee0f658.zip.

Direct URL

https://updates.cdn-apple.com/2025FallFCS/patches/047-72843/9485A3EF-C6AB-4C0B-848F-3A603BD11381/com_apple_MobileAsset_SoftwareUpdate/31bf09f5052bff9fd4316fa02031bc3b0ee0f658.zip