watchOS 5.3.10

watchOS

Version

5.3.10

Build ID

16U711

File Size

527.04 MB

Release Date

2026-03-24T18:34:37Z

Update Type

Normal release

Delta update - requires 5.1.1 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 2026-03-24T18:34:37Z. The update package is 527.04 MB. This is a delta (partial) update that requires 5.1.1 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 56449bd5de07d2c337fb186d4ce87f868ff52415.zip.

Direct URL

https://updates.cdn-apple.com/2025FallFCS/patches/047-72853/64A9A4F5-C3E0-4A70-A04B-D1466A9E7A13/com_apple_MobileAsset_SoftwareUpdate/56449bd5de07d2c337fb186d4ce87f868ff52415.zip