watchOS 5.3.10

watchOS

Version

5.3.10

Build ID

16U711

File Size

72.94 MB

Release Date

2026-03-24T18:36:05Z

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 (42mm) →

About This Update

watchOS 5.3.10 (build 16U711) is an official Apple over-the-air update for the Apple Watch Series 3 (42mm), released on 2026-03-24T18:36:05Z. The update package is 72.94 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 b48d6940e5740f13fb0c58e7e6d50cc6fb103104.zip.

Direct URL

https://updates.cdn-apple.com/2025FallFCS/patches/047-73000/137A3BDC-DC3B-431E-A394-7FEC04E08398/com_apple_MobileAsset_SoftwareUpdate/b48d6940e5740f13fb0c58e7e6d50cc6fb103104.zip