Compatibility
Apple Watch Ultra 4
Apple Watch Ultra 4 shipped with watchOS 27 and was released on September 18, 2026. The newest software it can install is watchOS 27.2 beta.
Shipped with
watchOS 27
Updates to
watchOS 27.2 beta
- Released
- September 18, 2026
- Chip
- S11
- Identifier
- Watch8,1
- Colors
Frequently asked questions
What watchOS version does Apple Watch Ultra 4 support?
Apple Watch Ultra 4 can update to watchOS 27.2 beta. That is the newest version Apple offers for this model.
What version did Apple Watch Ultra 4 come with?
Apple Watch Ultra 4 shipped with watchOS 27.
Which chip is in the Apple Watch Ultra 4?
Apple Watch Ultra 4 uses the S11 chip.
What is the model identifier of Apple Watch Ultra 4?
The model identifier is Watch8,1. You can match it against the Model Number shown in Settings → General → About.
Running the beta on this device
If Apple Watch Ultra 4 is still on Apple's compatibility list, you can install the current beta on it. Check Supported Devices to confirm, then follow our install guides. Devices that no longer receive major updates stay on watchOS 27.2 beta.
Thinking of upgrading?
Wondering whether it's a good time to replace your Apple Watch Ultra 4? The Buyer's Guide shows how long Apple's current models have been on sale and how long previous ones lasted, so you can tell whether to buy now or wait.