Apple Watch SE 3
Technical Specifications
Aluminum case
Starlight, Midnight
Price
Size and Weight
Height: 44mm
Width: 38mm
Depth: 10.7mm
368 by 448 pixels
977 sq mm display area
Weight (GPS): 32.9 grams
Weight (GPS + Cellular): 33.0 grams
Fits 140–245mm wrists
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
Controls
Digital Crown with haptic feedback
Side button
Double tap and wrist flick gestures
Siri with on‑device processing
Chip
S10 SiP 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 estimates
Heart Rate app
High and low heart rate notifications
Irregular rhythm notifications
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 resistance
Up to 1000 nits peak brightness
2 nits minimum brightness
326 pixels per inch
Audio
Speaker
Microphone
Media playback
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
Safety
Emergency SOS
International emergency calling
Crash Detection
Fall Detection
Noise monitoring
Backtrack
Durability
Water resistance 50m (swimproof)
Connectivity
L1 GPS, GNSS, Galileo, and QZSS
5G and LTE
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
Environmental Requirements
Operating temperature:
32° to 95° F (0° to 35° C)
Nonoperating storage temperature:
–4° to 113° F (–20° to 45° C)
Relative humidity:
5% to 90% noncondensing
Operating altitude:
0 feet to 10,000 feet (0m to 3000m)
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)
