watchOS 6.3.1

watchOS

Version

6.3.1

Build ID

17U6224

File Size

275.18 MB

Release Date

2026-02-02T18:44:08Z

Update Type

Normal release

Delta update - requires 6.2.8 installed first.

Download OTA

Looking for beta firmware? View beta builds for Apple Watch Series 2 (38mm) →

About This Update

watchOS 6.3.1 (build 17U6224) is an official Apple over-the-air update for the Apple Watch Series 2 (38mm), released on 2026-02-02T18:44:08Z. The update package is 275.18 MB. This is a delta (partial) update that requires 6.2.8 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 3513d9065cce48fa5f72d75de61e732c54b76939.zip.

Direct URL

https://updates.cdn-apple.com/2025FallFCS/patches/047-32105/91D78B47-B8E0-4A47-9536-C9DDE28470A9/com_apple_MobileAsset_SoftwareUpdate/3513d9065cce48fa5f72d75de61e732c54b76939.zip