Apple released watchOS 26.3 beta 1 to developers on Monday, December 15, 2025. Now the first public beta is rolling out to anyone enrolled in Apple’s Beta Software Program, which means non-developers can try the update as well.
For this first beta, the listed build number is 23S5586d.
If you rely on your Apple Watch for daily tracking, it is worth noting that beta software can be less stable than regular releases.
How to update watchOS 26.3 public beta
You install watchOS betas through the paired iPhone.
- Charge your Apple Watch to at least 50% and keep it on the charger.
- Connect your iPhone to Wi-Fi and keep it near your watch.
- Open the Watch app on iPhone.
- Go to My Watch > General > Software Update > Beta Updates.
- Select the watchOS Public Beta, then return to Software Update and install.
Changes in 26.3 beta 1
Early watchOS 26.3 builds appear to focus more on refinement than major new features.
Here is what you can expect in the first beta:
- Bug fixes and stability improvements for everyday use
- Performance tuning happening behind the scenes
- Compatibility fixes as Apple prepares the next full release
Apple can still add visible changes in later betas, so the feature list may change over time.
Final thoughts
If you install watchOS 26.3 public beta 1, share how it performs on your Apple Watch. Did you notice smoother performance, new bugs, or battery changes? Let us know in the comments.
