watchOS 6.3.1

watchOS

Version

6.3.1

Build ID

17U224

File Size

190.11 MB

Release Date

2026-02-02T18:44:11Z

Update Type

Normal release

Delta update - requires 6.2.9 installed first.

Download OTA

Looking for beta firmware? View beta builds for Apple Watch Series 2 (42mm) →

About This Update

watchOS 6.3.1 (build 17U224) is an official Apple over-the-air update for the Apple Watch Series 2 (42mm), released on 2026-02-02T18:44:11Z. The update package is 190.11 MB. This is a delta (partial) update that requires 6.2.9 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 25f724e96af21adaf930f922b4a708c13af8f6d3.zip.

Direct URL

https://updates.cdn-apple.com/2025FallFCS/patches/047-32198/BEBD6A30-0780-452F-ABF6-83CE490F02F1/com_apple_MobileAsset_SoftwareUpdate/25f724e96af21adaf930f922b4a708c13af8f6d3.zip