watchOS 5.3.10

watchOS

Version

5.3.10

Build ID

16U711

File Size

512.6 MB

Release Date

2026-03-24T18:34:39Z

Update Type

Normal release

Delta update - requires 5.1.2 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 2026-03-24T18:34:39Z. The update package is 512.6 MB. This is a delta (partial) update that requires 5.1.2 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 6f4193df8e44426933cfe71e912462927a85885e.zip.

Direct URL

https://updates.cdn-apple.com/2025FallFCS/patches/047-72900/DD78512B-7312-4DE0-996E-289A3B8272D7/com_apple_MobileAsset_SoftwareUpdate/6f4193df8e44426933cfe71e912462927a85885e.zip