Height: 40mm
Width: 34mm
Depth: 10.7mm
324×394 pixels
759 sq mm display area
Weight (GPS): 26.3 grams

Digital Crown with haptic feedback
Side button
Double tap and wrist flick gestures
Faster on-device Siri

S10 chip with 64‑bit dual core processor
4‑core Neural Engine
64GB capacity

Second-generation optical heart sensor
Temperature sensor1
Compass
Always-on altimeter
High-g accelerometer
High dynamic range gyroscope
Ambient light sensor

Cycle Tracking app with retrospective ovulation estimates²
Heart Rate app
High and low heart rate notifications
Irregular rhythm notifications³
Medications app
Mindfulness app
Noise app
Sleep app including sleep stages
Sleep score
Sleep apnoea notifications⁴
²The Cycle Tracking app should not be used for birth control or to diagnose a health condition.
³Irregular rhythm notification requires the latest version 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 (AF).
⁴Sleep 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.

Always-On Retina display with OLED and LTPO
Tough Ion-X front glass with 4x crack resistance⁵
Up to 1,000 nits peak brightness
2 nits minimum brightness
326 pixels per inch
⁵Apple Watch SE 3 Ion-X glass is 4x more crack resistant than Apple Watch SE 2.

Speaker
Microphone
Media playback

All‑day battery life, up to 18 hours of normal use⁶
Up to 32 hours in Low Power Mode⁶
Built‑in rechargeable lithium‑ion battery
Fast‑charge capable⁷
Up to 80% charge in about 45 minutes⁷
15 minutes for up to 8 hours of normal use⁸
⁸ minutes for up to 8 hours of sleep tracking8