Every year, Apple Watch owners wait to see what the Worldwide Developers Conference brings to their wrist. This year, watchOS 27 delivers one of the biggest Apple Watch updates in recent memory. Siri AI, enhanced fitness coaching, new health features, and improvements to Workout Buddy, Smart Stack, and Wallet all arrive in a single release.
The update also brings significant compatibility changes, making device support one of the biggest talking points following WWDC 2026. If you want to know what is new, whether your Apple Watch is supported, and what Siri AI can actually do, here is everything announced so far.
watchOS 27 Release Date
Apple announced watchOS 27 during WWDC 2026 on June 8, 2026. The developer beta became available immediately after the keynote.
- Developer Beta: Available now
- Public Beta: Expected July 2026
- Final Release: Expected September 2026
Most users should wait for the final September release rather than installing beta software on a device they depend on every day.
watchOS 27 Compatible Devices: The Full List
Compatibility generated confusion immediately after Apple’s announcement because Series 9 was accidentally left off the original documentation. Apple quickly corrected the mistake and confirmed Series 9 is fully supported.
Supported Apple Watch Models
- Apple Watch Series 9
- Apple Watch Series 10
- Apple Watch Series 11
- Apple Watch Ultra 2
- Apple Watch Ultra 3
- Apple Watch SE (3rd generation)
Models Losing Support
- Apple Watch Series 6
- Apple Watch Series 7
- Apple Watch Series 8
- Apple Watch Ultra (1st generation)
- Apple Watch SE (2nd generation)
watchOS 27 drops support for five models at once, representing one of the largest compatibility reductions Apple has made in a single release. Several of these devices are only a couple of years old, which is why the reaction from users has been strong.
iPhone Requirement for watchOS 27
To install watchOS 27, your paired iPhone must be an iPhone 11 or later, or iPhone SE 2nd generation or later, running iOS 27. Without a compatible iPhone, the update will not install. Full Siri AI also requires an iPhone 15 Pro, iPhone 16, or later to handle the AI processing.
Siri AI on Apple Watch: What It Really Does
Siri AI is the biggest addition in watchOS 27. Apple rebuilt it from scratch with Apple Intelligence powering the whole thing. It is smarter, more conversational, and handles complex requests way better than before.
There is also a brand new dedicated Siri app right on your Apple Watch, so you can start a conversation and pick it up later across any of your Apple devices. One thing to know upfront, though. Not every watch running watchOS 27 gets Siri AI.
Siri AI Requirements
Apple Watch Series 9 runs watchOS 27 but does not have Siri AI. Full Siri AI requires Series 10, Ultra 2, or SE 3, paired with an Apple Intelligence-compatible iPhone nearby. The AI processing happens through your paired iPhone rather than on the watch itself.
Apple has confirmed that Siri AI will not be available in the European Union or China at launch due to regulatory requirements. Availability varies by region from day one.
What Siri AI Lets You Do
- Ask open-ended questions and get genuinely useful answers
- Maintain context across follow-up requests
- Continue conversations from iPhone to Apple Watch
- Send messages and emails from your wrist
- Control music through natural language
- Perform actions inside supported third-party apps
- Manage everyday tasks entirely by voice
All New Features in watchOS 27
Dynamic App Grid
The app layout is completely redesigned. The Dynamic App Grid adapts to your usage patterns, prioritizing frequently used apps, recently opened apps, and Siri recommendations so the app you need stays front and center.
Workout Buddy Gets a Real Upgrade
Workout Buddy receives major improvements in watchOS 27:
- Personalized coaching based on your actual fitness history
- Real-time feedback on pace, distance, and duration
- Spanish language support added globally
- Works without an iPhone nearby, ideal for runners and gym users
- Better treadmill and indoor walk distance accuracy
Perimenopause and Women’s Health Support
Cycle Tracking gets a meaningful upgrade. The Health app monitors logged cycle patterns and flags signs that may suggest perimenopause. When detected, it directs users to educational resources and symptom information so you know what steps to take next.
New Gesture Controls for Smart Stack
Tap your index finger and thumb together once to open and select a Smart Stack widget without touching the screen. Particularly useful mid-workout or any time one hand is occupied.
Smarter Smart Stack
Smart Stack becomes more proactive throughout your day, automatically surfacing birthday reminders, your parked car location, transit card balances, and sleep schedule suggestions based on your daily context.
Wallet App: Custom QR Code Passes
Wallet now builds custom passes from any QR code or barcode, including gym memberships, loyalty cards, library cards, and event tickets. Pin them to Smart Stack, and they are one tap away when you need them.
Performance Improvements
- Music playback and controls start faster
- Step count syncs instantly between Fitness and Health apps
- Improved widget performance
- Battery optimization suggestions
- Expanded language support
watchOS 27 vs watchOS 26
| Feature | watchOS 26 | watchOS 27 |
|---|---|---|
| Siri AI | No | Yes (Series 10 and newer) |
| Dedicated Siri App | No | Yes |
| Dynamic App Grid | No | Yes |
| Workout Buddy Spanish | No | Yes |
| Workout Buddy Without iPhone | No | Yes |
| Perimenopause Tracking | No | Yes |
| Wallet Custom QR Passes | No | Yes |
| Smart Tap Gesture | No | Yes |
| Treadmill Distance Accuracy | Basic | Improved |
*Siri AI requires an Apple Watch Series 10, Ultra 2, or SE 3 along with an iPhone 15 Pro, iPhone 16, or newer. The feature won’t be available in the EU initially.
Wrap Up
watchOS 27 is one of the most complete Apple Watch updates in years. Siri AI, a smarter app grid, Workout Buddy upgrades, perimenopause tracking, Wallet QR passes, and smarter Smart Stack all land in one release.
The compatibility cuts are tough. Five models dropped at once, and Series 9 owners get the update but miss Siri AI completely. If your watch did not make the list, fall 2026 hardware is your next move. Supported device owners, mark September on your calendar. Apple knows exactly where it is taking the Apple Watch, and you do not want to miss what is coming.
