watchOS 5.3.10

watchOS

Version

5.3.10

Build ID

16U711

File Size

512.39 MB

Release Date

2026-03-24T18:35:18Z

Update Type

Normal release

Delta update - requires 5.0.1 installed first.

Download OTA

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

About This Update

watchOS 5.3.10 (build 16U711) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm), released on 2026-03-24T18:35:18Z. The update package is 512.39 MB. This is a delta (partial) update that requires 5.0.1 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 b703bc88e61c49e725fa96674bca5ea220c9d618.zip.

Direct URL

https://updates.cdn-apple.com/2025FallFCS/patches/047-72971/06069F80-6F2A-42D5-9422-A70865181582/com_apple_MobileAsset_SoftwareUpdate/b703bc88e61c49e725fa96674bca5ea220c9d618.zip