Watch SE 3 40mm (2025)

Apple Watch SE 3 is packed with health, fitness, connectivity and safety essentials — plus it’s great value. Track your sleep score. Get richer health insights in the Vitals app.[1] Stay active with a wide range of workouts. Save time with fast charging.[2] See your info at a glance with the Always-On display. And still get all-day, 18-hour battery life.[3]

Key Features

Health Essentials
Temperature sensing[4] enables richer insights in the Vitals app[1] and retrospective ovulation estimates. You’ll also get a daily sleep score and sleep apnoea notifications[5], and be alerted if you have an unusually high or low heart rate, or an irregular rhythm.[6]

Great Battery Life
Enjoy all-day, 18-hour battery life.[3] Then charge up to twice as fast as SE 27 and get up to 8 hours of battery in just 15 minutes.[2]

Always-On Display
Now you can read the time and see the watch face without raising your wrist to wake the display.

A Great Fitness Partner
SE 3 gives you a healthy number of ways to track your workouts. With real-time metrics and Workout Buddy powered by Apple Intelligence from your nearby iPhone[8], you’ll hit your goals like never before.

Stay Connected
Send a text, take a call, listen to music and podcasts, use Siri and get notifications. SE 3 (GPS) works with your iPhone or Wi-Fi to keep you connected.

Safety Features
SE 3 can detect a hard fall or severe car crash, automatically help connect you with emergency services and notify your emergency contacts.[9] Check In can automatically notify a loved one when you’ve arrived at your destination.

Your Watch, Your Way
Express yourself with dozens of easily customisable faces and a wide range of bands in different colours, styles and materials.

Legal
Apple Watch SE 3 requires iPhone 11 or later with iOS 26 or later.
[1]The Vitals app is for wellness purposes only and not for medical use.
[2]Fast charging is compatible with Apple Watch Series 7 and later, any Apple Watch Ultra model and Apple Watch SE 3.
[3]Battery life varies by use and configuration; see apple.com/au/watch/battery for more information.
[4]The temperature sensing feature is not intended for medical use. Temperature sensing is available only on Apple Watch Series 8 and later and all Apple Watch Ultra models.
[5]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 aged 18 years or older without a diagnosis of sleep apnoea. Always follow directions for use. The feature is not intended for use in screening for, diagnosing, treating or managing sleep apnoea. Even without a notification, sleep apnoea may still be present. Consult a medical practitioner if you have symptoms of sleep apnoea, or any other breathing disturbance.
[6]Irregular rhythm notification requires the latest versions of watchOS and iOS. It is not intended for use by people under 22 years old or those who have been previously diagnosed with atrial fibrillation (AFib). Always follow directions for use. The device is not intended to replace traditional methods of diagnosis. Consult a doctor if atrial fibrillation is detected or if you have symptoms of a heart attack, stroke or other cardiovascular conditions.
[7]Testing conducted by Apple in July and August 2025 using preproduction Apple Watch SE 3 (GPS + Cellular) and Apple Watch SE 2 (GPS + Cellular), each paired with an iPhone; all devices tested with prerelease 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.
[8]Requires an Apple Intelligence–enabled iPhone nearby and Bluetooth® headphones with device and Siri language set to English. Apple Intelligence is available in beta. Some features may not be available in all regions or languages. For feature and language availability and system requirements, see support.apple.com/121115.
[9]Emergency SOS requires a mobile network 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 a mobile network is available. Some mobile networks may not accept an emergency call from your Apple Watch if your Apple Watch isn’t activated, if 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/108374 and apple.com/au/watch/cellular for more information.