Apple Watch SE 3 GPS 40mm Midnight Aluminium Case with Midnight Sport Band - S/M

Material and Finish
Aluminum case
Midnight

Band
Sport Band

Size and Weight
Height: 40mm
Width: 34mm
Depth: 10.7mm
324 by 394 pixels
759 sq mm display area
Weight (GPS): 26.3 grams
Weight (GPS + Cellular): 26.4 grams
Fits 130–200mm wrists

Hardware and Buttons
Digital Crown
Microphone
Side button
Speaker/air vent
Optical heart sensor

Controls
Digital Crown with haptic feedback
Side button
Double tap and wrist flick gestures
Siri with on‑device processing

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

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

Health and Wellness
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 apnea notifications

Display
Always-On Retina display with OLED and LTPO
Tough Ion-X front glass with 4x crack resistance5
Up to 1000 nits peak brightness
2 nits minimum brightness
326 pixels per inch

Power and Battery Life
All‑day battery life, up to 18 hours of normal use
Up to 32 hours in Low Power Mode
Built‑in rechargeable lithium‑ion battery
Fast‑charge capable
Up to 80% charge in about 45 minutes
15 minutes for up to 8 hours of normal use
8 minutes for up to 8 hours of sleep tracking

Operating System
watchOS
watchOS is the world’s most advanced wearable operating system, with apps and features designed to keep you active, healthy, safe, and connected.

Workouts and Activity
Running
Custom workouts
Customizable Workout Views
Training Load
Heart Rate Zones
Race Route
Pacer
Stride Length, Ground Contact Time, and Vertical Oscillation
Automatic track detection
Multisport workout

Hiking
Compass with bearing, incline, elevation, and coordinates
Custom waypoints
Automatically generated waypoints to cellular connectivity
Backtrack GPS data
Offline maps with custom route creation
Topographic maps for thousands of national and regional parks (U.S. only)
Hundreds of curated hikes across all 63 U.S. national parks

Cycling
Average speed, elevation gained, and distance
Connection to cycling accessories via Bluetooth
Functional Threshold Power
Power Zones
Cadence
Live Activity on iPhone

Swimming
Pool swim or open water swim
Custom workouts for pool swims
Splits and auto sets
SWOLF score
Automatic stroke detection
Kickboard detection
Average pace, total distance, and laps

More Workouts
Skiing
Snowboarding
Outdoor Rowing
Paddling
Golf
Walk
Elliptical
Rower
Stair Stepper
HIIT
Yoga
Functional Stength Training
Dance
Cooldown
Core Training
Pilates
Tai Chi
Wheelchair
Kickboxing
Multisport
Other

Safety
Emergency SOS
International emergency calling
Crash Detection
Fall Detection
Noise monitoring
Backtrack

Durability
Water resistance 50m (swimproof)

Connectivity
Wi-Fi 4 (802.11n)
Support for 2.4GHz Wi-Fi networks
Bluetooth 5.3
Apple Pay
GymKit
Support for Apple Watch For Your Kids
International roaming

Accessibility
Built‑in accessibility features supporting vision, mobility, hearing, and cognitive disabilities.

Features include:
VoiceOver
Zoom
On/Off Labels
Reduce Transparency
Increase Contrast
Color Filters
Text Size
Bold Text
Reduce Motion
Hourly Chimes
AssistiveTouch
Button Click Speed
Touch Accommodations
Auto-Answer Calls
Type to Siri
RTT Support
Audio Volume Balance
Auto Transcription
Live Speech
Accessibility Shortcut
Mono Audio
Taptic Time
Personal Voice
Live Listen

Compatibility
iPhone 11 or later, including iPhone SE (2nd generation or later), with iOS 26 or later

In the Box
Apple Watch SE 3
Band
Apple Watch Magnetic Fast Charger to USB‑C Cable (1m)

A new Always‑On display lets you read the time and more without raising your wrist.
Introducing sleep score — an easy way to track and help improve the quality of your zzz’s
New wrist temperature sensing gives you richer health insights in the Vitals app
Enjoy all‑day, 18‑hour battery life. Then recharge up to 2x as quickly with new fast charging
Keep help close at hand with safety features like Crash Detection and Fall Detection

Get meaningful insights about your health just by wearing your Apple Watch SE 3. A new wrist temperature sensor enables deeper insights in the Vitals app and retrospective ovulation estimates in the Cycle Tracking app. You’ll also receive a daily sleep score and possible sleep apnea notifications. It’s never been easier to live in the know. Make every move count. From running to riding your bike, tennis to tai chi, Apple Watch SE 3 gives you a healthy number of ways to track your workouts. With real‑time metrics and new personalized fitness encouragement, it will motivate you to hit your goals like never before.