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AppleDevices · read Oct 12, 2026

Apple Watch SE 3

The technical specifications as Apple publishes them, grouped as on apple.com. Copied as written; we add nothing.

Source: apple.com
Spec groups19
Spec rows23
Official charts0
Sibling devices2
ReadOct 2026

Compare with

Apple Watch Series 12Apple Watch Ultra 4

Chips named on its spec page

Apple watch, wireless and modem chips

Spec sheet

Material and Finish

  • Aluminum case
  • Midnight, Starlight

Size and Weight

column 1
  • 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 to 245mm wrists
column 2
  • 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 to 200mm wrists

Controls

  • Digital Crown with haptic feedback
  • Side button
  • Single tap, double tap, and wrist flick gestures
  • Siri powered by Apple Intelligence

Chip

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

Apple Intelligence and Siri AI

The next generation of Apple Intelligence is centered around you, integrated into your apps, and built with privacy. Apple Intelligence powers Siri AI, an entirely new version of Siri that’s more personal, conversational, and powerful, along with helpful features across apps.

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

  • Heart Rate app
  • High and low heart rate notifications
  • Irregular rhythm notifications
  • Advanced Cycle Tracking app with fertile window estimates, retrospective ovulation estimates, and perimenopause and menopause support
  • 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
  • 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
  • Up to 7 hours workout tracking
  • 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

column 1
  • Running
  • Custom workouts
  • Customizable Workout Views
  • Training Load
  • Heart Rate Zones (customizable)
  • Postworkout heart rate
  • VO2 max
  • Race Route
  • Pacer
  • Cadence, Stride Length, Ground Contact Time, Vertical Oscillation, and Running Power
  • Automatic track detection
  • Multisport workout
  • Heart Rate Zone, pace, and target alerts
column 2
  • 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
column 3
  • Cycling
  • Average speed, elevation gained, and distance
  • Connection to cycling accessories via Bluetooth
  • Functional Threshold Power
  • Power Zones
  • Cadence
  • Live Activity on iPhone
column 4
  • 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
  • Fall Detection
  • Crash Detection
  • Noise monitoring
  • Backtrack
  • Check In

Durability

Water resistance 50m (swimproof)

Connectivity

  • All models
  • Support for 2.4GHz Wi-Fi networks
  • Wi-Fi 4 (802.11n)
  • Bluetooth 5.3
  • L1 GPS (GLONASS, Galileo, QZSS, and BeiDou)
  • Apple Pay
  • GymKit
  • Models A3326 and A3328
  • Supports RedCap for 5G and LTE
  • FDD-5G NR (Bands n1, n2, n3, n5, n7, n8, n12, n14, n20, n25, n26, n28, n66, n71)
  • TDD-5G NR (Bands n38, n40, n41)
  • FDD-LTE (Bands 1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 17, 18, 19, 20, 25, 26, 28, 66, 71)
  • TDD-LTE (Bands 38, 39, 40, 41)
  • 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 27 or later

In the Box

  • Apple Watch SE 3
  • Band
  • Apple Watch Magnetic Fast Charger to USB-C Cable (1m)

Questions people ask

What are the Apple Watch SE 3 specs?

19 spec groups and 23 rows, copied from Apple's own spec page, read Oct 12, 2026. Nothing here comes from rumours.