watchOS 5.3.10

watchOS

Version

5.3.10

Build ID

16U711

File Size

76.59 MB

Release Date

2026-03-24T18:35:34Z

Update Type

Normal release

Delta update - requires 5.3.6 installed first.

Download OTA

Looking for beta firmware? View beta builds for Apple Watch Series 3 (38mm) →

About This Update

watchOS 5.3.10 (build 16U711) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm), released on 2026-03-24T18:35:34Z. The update package is 76.59 MB. This is a delta (partial) update that requires 5.3.6 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 fbefc4fdc81818c35a56775801bc20d7b24ea118.zip.

Direct URL

https://updates.cdn-apple.com/2025FallFCS/patches/047-73055/C66E232F-1C43-42CA-83D7-E47DCA977C72/com_apple_MobileAsset_SoftwareUpdate/fbefc4fdc81818c35a56775801bc20d7b24ea118.zip