watchOS 5.3.10

watchOS

Version

5.3.10

Build ID

16U711

File Size

87.17 MB

Release Date

2026-03-24T18:37:04Z

Update Type

Normal release

Delta update - requires 5.3.1 installed first.

Download OTA

Looking for beta firmware? View beta builds for Apple Watch Series 4 (44mm, LTE) →

About This Update

watchOS 5.3.10 (build 16U711) is an official Apple over-the-air update for the Apple Watch Series 4 (44mm, LTE), released on 2026-03-24T18:37:04Z. The update package is 87.17 MB. This is a delta (partial) update that requires 5.3.1 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 e66dd79d6eb67f37503d36d9818f86596856835b.zip.

Direct URL

https://updates.cdn-apple.com/2025FallFCS/patches/047-73042/1675525A-DEA1-4B77-AD40-57A0E0A2977A/com_apple_MobileAsset_SoftwareUpdate/e66dd79d6eb67f37503d36d9818f86596856835b.zip