watchOS 5.3.10

watchOS

Version

5.3.10

Build ID

16U711

File Size

102.21 MB

Release Date

2026-03-24T18:34:53Z

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 (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 2026-03-24T18:34:53Z. The update package is 102.21 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 50b7928145dee60d2abc4a5ed8cd966331b80ed5.zip.

Direct URL

https://updates.cdn-apple.com/2025FallFCS/patches/047-73021/531E6E5C-68C6-4279-B144-FBB7EA3EB354/com_apple_MobileAsset_SoftwareUpdate/50b7928145dee60d2abc4a5ed8cd966331b80ed5.zip