Apple Watch SE 3 - Tech Specs

1. Apple Intelligence is available with Siri and device language set to Chinese (Simplified), Chinese (Traditional), Danish, Dutch, English, French, German, Italian, Japanese, Korean, Norwegian, Portuguese, Spanish, Swedish, Turkish or Vietnamese. Some features may not be available in all regions or languages. Some devices may not be available in all regions. Siri AI is available in beta in watchOS 27 and requires an Apple Intelligence–enabled device set to a supported language. Available in English to start. Siri AI will not be initially available in the EU on watchOS. Certain Apple Intelligence features that rely on server-side models are subject to daily usage limits, including but not limited to Siri AI. Daily limits may vary by feature, request complexity, system demand, system policies and other factors. Expanded access to such features will be available for a fee in the future. Use of these features is subject to the Apple Intelligence Terms and Conditions. Learn more at apple.com/uk/apple-intelligence.

2. The temperature sensing feature is not intended for medical use. Temperature sensing is available on Apple Watch Series 8 and later, Apple Watch SE 3 and all Apple Watch Ultra models.

3. Irregular rhythm notifications are not intended for use by people under 22 years old or those who have been previously diagnosed with atrial fibrillation (AF).

4. The Cycle Tracking app should not be used for birth control or to diagnose a health condition. Cycle deviation notifications are based solely on the user’s logged cycle history. Cycle deviation notifications inclusive of perimenopause are for people 40 years old or older. These notifications are not intended to replace traditional methods of diagnosis, monitoring or treatment of perimenopause or menopause.

5. The Medications feature should not be used as a substitute for professional medical judgement. Additional information is available on the labels of your medications, but please consult your healthcare provider prior to making any decisions related to your health.

6. Sleep apnoea notifications are available on Apple Watch Series 9 and later, Ultra 2 and later, and SE 3. The feature is intended to detect signs of moderate to severe sleep apnoea for people 18 years old or older without a diagnosis of sleep apnoea.

7. Apple Watch SE 3 Ion-X glass is 4x more crack resistant than Apple Watch SE 2.

8. All‑day battery life is based on the following use: 300 time checks, 90 notifications, 15 minutes of app use and a 60‑minute workout with music playback from Apple Watch via Bluetooth, over the course of 18 hours; Apple Watch SE 3 (GPS) usage includes connection to iPhone via Bluetooth during the entire 18‑hour test; Apple Watch SE 3 (GPS + Cellular) usage includes a total of 4 hours of cellular connection and 14 hours of connection to iPhone via Bluetooth over the course of 18 hours. Battery life in Low Power Mode including sleep tracking is based on the following use: 430 time checks, 130 notifications, 20 minutes of app use, a 60‑minute workout with music playback from Apple Watch via Bluetooth, and 6 hours of sleep tracking over the course of 32 hours; Apple Watch SE 3 (GPS) usage includes connection to iPhone via Bluetooth during the entire 32‑hour test; Apple Watch SE 3 (GPS + Cellular) usage includes on‑demand cellular connection and 24 hours of connection to iPhone via Bluetooth over the course of 32 hours. Testing conducted by Apple in July and August 2025 using pre‑production Apple Watch SE 3 (GPS) and Apple Watch SE 3 (GPS + Cellular), each paired with an iPhone; all devices tested with pre‑release software. Battery life varies by use, configuration, mobile network, signal strength and many other factors; actual results will vary.

9. Workout tested without iPhone and with heart rate sensor on during outdoor run workout sessions. Testing conducted by Apple in July and August 2025 using pre‑production Apple Watch SE 3 (GPS) and Apple Watch SE 3 (GPS + Cellular); all devices tested with pre‑release software. Battery life varies by use, configuration, mobile network, signal strength and many other factors; actual results will vary.

10. Charge times are from 0–80% and 0–100% using the included Apple Watch Magnetic Fast Charger to USB‑C Cable. Testing conducted by Apple in July and August 2025 using pre‑production Apple Watch SE 3 (GPS) and Apple Watch SE 3 (GPS + Cellular), each paired with an iPhone; all devices tested with pre‑release software, Apple Watch Magnetic Fast Charger to USB‑C Cable (Model A2515) and Apple 20W USB‑C Power Adapter (Model A2305). Fast-charge testing conducted with drained Apple Watch units. Times measured from the appearance of the Apple logo as the unit started up. Charge time varies with adapter, region, settings, initial battery levels, usage and environmental factors; actual results will vary.

11. Testing conducted by Apple in July and August 2025 using pre‑production Apple Watch SE 3 (GPS) and Apple Watch SE 3 (GPS + Cellular), each paired with an iPhone; all devices tested with pre‑release software, Apple Watch Magnetic Fast Charger to USB‑C Cable (Model A2515) and Apple 20W USB‑C Power Adapter (Model A2305). Charge time varies with adapter, region, settings, initial battery levels, usage and environmental factors; actual results will vary.

12. Offline Maps is available for Apple Watch Series 6 and later, Apple Watch SE 2 and later, and all Apple Watch Ultra models with watchOS 26 or later. Requires iPhone 11 or later with iOS 26 or later. Not available in all countries and regions.

13. Emergency SOS requires a cellular connection or Wi‑Fi calling with an internet connection from your Apple Watch or nearby iPhone. You can use cellular models of Apple Watch to make an emergency call in many locations, provided that mobile service is available. Some mobile networks may not accept an emergency call from your Apple Watch if your Apple Watch isn’t activated, if it isn’t compatible with or configured to operate on a particular mobile network, if it isn’t set up for mobile service, or if the mobile network does not support emergency calling over IMS. See support.apple.com/en-gb/108374 and apple.com/uk/watch/cellular for more information.

14. International emergency calling requires Apple Watch Series 5 (GPS + Cellular) or later, Apple Watch SE (GPS + Cellular) or later, or Apple Watch Ultra or later. For a list of supported countries and regions, see apple.com/uk/watchos/feature-availability.

15. Apple Watch SE 3 has a water resistance rating of 50 metres under ISO standard 22810:2010. This means that it may be used for shallow-water activities like swimming in a pool or ocean. It should not be used for scuba diving, waterskiing or other high-velocity water sports, or submersion below shallow depth. Water resistance is not a permanent condition and can diminish over time. For more information, see support.apple.com/en-gb/109522.

16. Any card used in Apple Pay is offered by the card issuer. To use Apple Pay you need a supported card from a participating card issuer. To check if your card is compatible with Apple Pay, contact your card issuer. Apple Pay is not available in all markets. View Apple Pay countries and regions.

17. Data plan required. 5G is available in selected markets and through selected network providers. Speeds vary based on site conditions and network. For details on 5G support, contact your provider and see apple.com/uk/watch/cellular.

18. Wireless service plan required for mobile service. Contact your service provider for more details. Connection may vary based on network availability. Check apple.com/uk/watch/cellular for participating network providers and eligibility. See support.apple.com/en‑gb/HT207578 for additional setup instructions.

19. Not all features will be available if the Apple Watch is set up through Apple Watch For Your Kids. Check support.apple.com/en‑gb/109036 for details. Wireless service plan required for mobile service. Check apple.com/uk/watch/cellular for participating network providers and eligibility.

20. Product recycled or renewable content is the mass of certified recycled material relative to the overall mass of the device, not including packaging or in‑box accessories. Recycled and renewable plastic content calculation includes mass balance allocation.

21. Breakdown of US retail packaging by weight. Adhesives, inks and coatings are excluded from our calculations of plastic content and packaging weight. Fibre sourcing requirements are defined in Apple’s Responsible Fibre Specification. We consider wood fibres to include bamboo.

22. Our manufacturing electricity is sourced from clean electricity, including a mix of supplier and Apple clean-energy projects.

23. Apple Watch SE 3 meets California Energy Commission’s Energy Efficiency Standards for Small Battery Charger Systems as outlined in the California Code of Regulations.

24. All established final assembly supplier sites — those that have been Apple suppliers for more than one year — for Apple Watch SE 3 are third-party verified as Zero Waste by UL LLC (UL 2799 Standard). UL requires at least 90% diversion through methods other than waste to energy to achieve Zero Waste to Landfill (Silver 90‑94%, Gold 95‑99% and Platinum 100%) designations.

25. Apple’s Regulated Substances Specification describes Apple’s restrictions on the use of certain chemical substances in materials in Apple products, accessories, manufacturing processes and packaging used for shipping products to Apple’s end customers. Restrictions are derived from international laws or directives, regulatory agencies, eco-label requirements, environmental standards and Apple policies. Every Apple product is free of PVC and phthalates except for AC power leads in India, Thailand (for two-pin AC power leads) and South Korea, where we continue to seek government approval for our PVC and phthalates replacement. Apple products comply with the European Union Directive 2011/65/EU and its amendments, including exemptions for the use of lead such as high-temperature solder. Apple is working to phase out the use of these exempted substances for new products where technically possible.

Apple Watch Series 12, Apple Watch Ultra 4 and Apple Watch SE 3 require iPhone 11 or later with iOS 27 or later.

Features are subject to change. Some features, applications and services may not be available in all regions or all languages and may require specific hardware and software. For more information, see watchOS Feature Availability.