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Review Summary
Starlight, Midnight
40mm, 44mm
Small/Medium, Medium/Large
GPS, GPS + Cellular
Aluminum case
Digital Crown
Microphone
Side button
Speaker/air vent
Optical heart sensor
Digital Crown with haptic feedback
Side button
Double tap and wrist flick gestures
Siri with on-device processing
S10 chip with 64-bit dual core processor
4-core Neural Engine
64GB capacity
Second-generation optical heart sensor
Temperature sensor
Compass
Always-on altimeter
High-g accelerometer
High dynamic range gyroscope
Ambient light sensor
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
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
Speaker
Microphone
Media playback
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
watchOS: watchOS is the world's most advanced wearable operating system, with apps and features designed to keep you active, healthy, safe, and connected.
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 workout for pool swims
Splits & auto sets
SWOLF score
Automatic stroke detection
Kickboard detection
Average pace, total distance & laps
More Workouts:
Skiing
Snowboarding
Outdoor Rowing
Paddling
Golf
Walk
Elliptical
Rower
Stair Stepper
HIIT
Yoga
Functional Strength Training
Dance
Cooldown
Core Training
Pilates
Tai Chi
Wheelchair
Kickboxing
Multisport
Other
Emergency SOS
International emergency calling
Crash Detection
Fall Detection
Noise monitoring
Backtrack
Water resistance 50m (swimproof)
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
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
Operating temperature: 32 Degree to 95 Degree F (0 Degree to 35 Degree C)
Nonoperating storage temperature: -4 Degree to 113 Degree F (-20 Degree to 45 Degree C)
Relative humidity: 5% to 90% noncondensing
Operating altitude: 0 feet to 10,000 feet (0m to 3000m)
iPhone 11 or later, including iPhone SE (2nd generation or later), with iOS 26 or later
44mm: 5.5-9.6" (140-245mm) wrists
40mm: 5.1-7.8" (130-200mm) wrists
Required, included
Lithium ion
Non-universal
1
44mm: 1.7 x 1.5 x 0.42" (44 x 38 x 10.7mm)
368 by 448 pixels
977 sq mm display area
40mm: 1.5 x 1.3 x 0.42" (40 x 34 x 10.7mm)
324 by 394 pixels
759 sq mm display area
44mm:
GPS: 1.1 oz (32.9g)
GPS + Cellular: 1.2 oz (33g)
40mm:
GPS: 0.92 oz (26.3g)
GPS + Cellular: 0.93 oz (26.4g)
195950386479
Apple Watch SE 3 is packed with health, fitness, connectivity, and safety essentials—all for a great value.
Track your sleep score. Get richer health insights in the Vitals app. Stay active with a wide range of workouts. Save time with fast charging. See your info at a glance with the Always-On display. And still get all-day, 18-hour battery life.
The SE 3 has a bright Retina display that makes it easy to read your stats, notifications, and messages at a glance.
It’s slim, comfortable, and lighter than other models — so you can wear it all day without noticing it’s there.
The SE 3 tracks your heart rate and sleep, and it alerts you if your heart rate goes too high, too low, or if your rhythm looks irregular. It can also give you insights into possible sleep apnea.
Every morning, you’ll see a sleep score that helps you understand how well you rested, along with more detailed sleep data in the Vitals app.
Track workouts like running, cycling, and yoga, and see progress with your Activity rings. Pair with iPhone for extra motivation through the Workout Buddy feature.
SE 3 lasts a full day on a single charge, and fast charging gives you up to 8 hours of use in just 15 minutes.
If you take a hard fall or are in a severe car crash, SE 3 can automatically call emergency services. With Check In, it can also notify loved ones when you arrive at your destination.
Set up an Apple Watch SE 3 for kids or older family members who don’t have an iPhone. They can stay connected, while you manage settings and safety features.
Express yourself with dozens of easily customizable faces and a wide range of bands in different colors, styles, and materials.
The GPS version works when paired with your iPhone, while the GPS + Cellular version keeps you connected with calls, texts, and music even without your phone.
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