Apple’s September event is expected to be one of the company’s most important product showcases in years. While the spotlight usually falls on the new iPhones, the wearable side of the keynote is just as significant for millions of Apple Watch owners. Recent reporting indicates Apple is preparing two new Watch models for the launch window: Apple Watch Ultra 4 and Apple Watch Series 12. Both are expected to be revealed alongside the iPhone 18 Pro and iPhone Ultra, making the event a true ecosystem refresh.

Apple has held a major September event almost every year since 2012, and since the original Apple Watch launched in 2015, the company has often paired new iPhone announcements with new wearable hardware. This year’s lineup follows that tradition, but it also comes at a time when Apple Watch competition is intensifying. Smartwatches from other makers have improved battery life and health tracking, so Apple’s response with new Watches is likely to be more substantial than a simple spec bump.

Key facts at a glance

• Apple is expected to unveil Apple Watch Ultra 4 and Apple Watch Series 12 next month.
• Both models are expected to feature the new S11 chip, offering a long-awaited performance boost.
• watchOS 27 is expected to bring Siri AI features that may rely on the improved chip.
• A major redesign is not likely this year, but a ceramic case option could return.
• Apple Watch Ultra 4 is reported to include a significant jump in sensor count, possibly related to blood pressure monitoring.
• Regulatory review is reportedly underway for a new high blood pressure notification feature.

Two distinct models, one launch

Apple Watch Series 12 is likely to be the standard model for most customers. It will probably maintain a slim profile, offer the usual aluminum and stainless steel options, and focus on general health and fitness. Apple Watch Ultra 4, meanwhile, is built for outdoor sports and extreme environments. The Ultra line was introduced in 2022 as a larger, tougher alternative to the standard Watch, with a flat screen, a protruding side button, a programmable Action button and a longer-lasting battery. Those characteristics are expected to continue in the fourth generation.

Although both watches are expected to share key technologies, their displays, materials and battery capacities are likely to differ. The Ultra’s higher price has always been justified by its larger battery, its durable titanium casing and its advanced sensors. The Series 12 is expected to remain the more accessible option, but it may still gain some of the health features previously reserved for the Ultra.

S11 chip and the performance jump

The most reliable detail in the rumor chain is performance. Both Apple Watch Ultra 4 and Apple Watch Series 12 are expected to use a new S11 chip. Current Apple Watch models use the S10 chip, introduced with the previous generation. However, the S10 did not deliver a noticeable performance increase over the S9, which debuted in 2023. That lack of progress has been a common complaint among users who upgrade every few years.

The S11 chip could finally change that. It is expected to feature a faster CPU, a more efficient GPU and an upgraded Neural Engine. The latter is particularly important because watchOS 27 is expected to bring Siri AI to the Watch. On-device AI models require significant processing power, and a faster Neural Engine would allow Apple to run features such as improved voice recognition, smarter notification summaries and advanced workout suggestions directly on the watch. This would also improve privacy by reducing the need to send sensitive health data to the cloud.

A faster chip would also improve system responsiveness, app launches and animations. The Apple Watch has always been smooth, but heavier applications and interactive watch faces have struggled on older chips. The S11 is likely to address those limitations.

Design and materials: ceramic could return

There have been conflicting reports about the design of the new Watches. One report from the supply chain has claimed Apple Watch Ultra 4 will receive a major redesign, but other sources have pushed back, saying Apple will not introduce a dramatically different shape until next year. For now, the safer expectation is a modest design refresh rather than a wholesale change.

One interesting possibility is the return of ceramic. Apple previously sold ceramic versions of the Apple Watch as part of the high-end Edition collection, but the material disappeared when the company shifted to titanium. Ceramic is highly scratch-resistant, lightweight and has a unique look that differs from aluminum or steel. If Apple brings back ceramic for the Series 12, it could create a new premium tier that sits above stainless steel but below the Ultra. This would be a differentiator without requiring a full redesign.

Color options and band compatibility are also part of the design equation. New Watches are expected to be compatible with existing bands, which has been true of every Apple Watch since the first generation. Customers are likely waiting for elegant new band colors and maybe a few new band styles to accompany the hardware.

Sensors and health features

Health is one area where Apple has consistently pushed the Apple Watch forward. The original Watch had a heart rate sensor and an accelerometer. Over time, Apple added GPS, an altimeter, an ECG, a blood oxygen sensor, temperature sensing and crash detection. The next step appears to be blood pressure, one of the most important metrics for long-term health that is still difficult to measure non-invasively.

Apple reportedly introduced hypertension notifications last year through watchOS 26. The feature is designed to alert users when their blood pressure levels appear elevated. However, like many Apple health features, it is intended to provide guidance and possible awareness, not clinical measurements. The system appears to be based on sensor data and trends rather than a cufflike measurement. With the next generation, Apple is expected to refine this feature and potentially expand it to more regions.

According to reports, Apple Watch Ultra 4 could double its sensor count compared with current models. Some of those new sensors may be linked to improved hypertension monitoring. The additional sensors could also be used for new wellness metrics, such as stress detection or hydration tracking. More sensors usually mean more complexity, and Apple has historically been careful to pair new hardware with clear user-facing features.

The FDA is reportedly reviewing a new notification feature related to high blood pressure. If regulators approve the feature in time, it could be unveiled alongside the new Watch models next month. A launch tied to new hardware would be a major marketing point. Without regulatory approval, Apple would have to either delay the feature or release it in a limited capacity. The timing of the approval will be one of the most important factors in the final feature list.

watchOS 27 and software experience

Hardware is only half the story. Apple is expected to introduce watchOS 27 at the same event, and the software update will likely ship shortly after the new Watches. The big software change this year is Siri AI. Apple has been rebuilding Siri around large language models, and the Watch version of Siri is expected to gain more natural conversations, better understanding of health questions and more proactive assistance.

The Siri AI upgrade will need enough memory and processing power to run efficiently on the Watch. That is one reason why the S11 chip is so important. Older Watches may receive a limited version of Siri AI, but the full experience may be reserved for the S11 generation. If that is the case, customers who want the improved Siri will have a strong reason to buy either the Series 12 or the Ultra 4.

watchOS 27 is also likely to include new watch faces, more powerful complications and updated fitness features. Apple’s Fitness app has become a central part of the Watch experience, and the new AI capabilities could generate personalized workout recommendations based on a user’s history, current heart rate and recovery status. The notification system may also become smarter, grouping less important alerts and presenting them when appropriate.

What will Apple announce next month?

Apple has not confirmed the exact date of its September event, but the company has typically chosen the first or second Tuesday after Labor Day. The event will likely be a recorded presentation, followed by a press release that includes details on pricing and availability. Historically, the iPhone goes on sale the following Friday, with the Apple Watch following a week later. Analysts expect the same cadence to apply in 2026.

The new models will arrive at a critical time. The smartwatch market has matured, and Apple faces stronger competition than ever. Wearables from Garmin, Samsung, Google and others have focused on battery life, sleep tracking, and outdoor sports features. Apple’s advantage has always been the strength of its ecosystem, and the new Watch models will take advantage of the iPhone 18 lineup with tighter integration and cross-device features.

There are still many questions. Will the S11 chip live up to expectations? Will a ceramic Apple Watch return to the lineup after all these years? Will the blood pressure notification receive FDA approval in time for launch? Apple may answer all of these questions as soon as next month. In the meantime, the available leaks make one thing clear: Apple Watch Ultra 4 and Series 12 are expected to be the most significant watch upgrades in several seasons.

Source: 9to5Mac News