watchOS 5.3.10

watchOS

Version

5.3.10

Build ID

16U711

File Size

54.35 MB

Release Date

2026-03-24T18:34:31Z

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 1 (42mm) →

About This Update

watchOS 5.3.10 (build 16U711) is an official Apple over-the-air update for the Apple Watch Series 1 (42mm), released on 2026-03-24T18:34:31Z. The update package is 54.35 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 5ca32b9655939b552ee38d70219f78499ce7d548.zip.

Direct URL

https://updates.cdn-apple.com/2025FallFCS/patches/047-72862/878DA2B3-D4E8-4865-A023-E1B5C3454922/com_apple_MobileAsset_SoftwareUpdate/5ca32b9655939b552ee38d70219f78499ce7d548.zip