Apple Watch SE 3 Technical Specifications

Material and Finish

Aluminium case

Midnight, Starlight

Size and Weight
  • Height: 44 mm
  • Width: 38 mm
  • Depth: 10.7 mm
  • 368 by 448 pixels
  • 977-sq-mm display area
  • Weight (GPS): 32.9 grams
  • Weight (GPS + Cellular): 33.0 grams
  • Fits 140–245-mm wrists
  • Height: 40 mm
  • Width: 34 mm
  • Depth: 10.7 mm
  • 324 by 394 pixels
  • 759-sq-mm display area
  • Weight (GPS): 26.3 grams
  • Weight (GPS + Cellular): 26.4 grams
  • Fits 130–200-mm wrists
Hardware and Buttons
Controls
  • Digital Crown with haptic feedback
  • Side button
  • Single tap, double tap and wrist flick gestures
  • Siri powered by Apple Intelligence1
Chip
S10 chip
  • S10 chip with 64‑bit dual core processor
  • 4‑core Neural Engine
  • 64GB capacity
Apple Intelligence and Siri AI1

The next generation of Apple Intelligence is centred 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.

Learn more

Sensors
  • Second-generation optical heart sensor
  • Temperature sensor2
  • 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 notifications3
  • Advanced Cycle Tracking app with fertile window estimates, retrospective ovulation estimates, and perimenopause and menopause support4
  • Medications app5
  • Mindfulness app
  • Noise app
  • Sleep app including sleep stages
  • Sleep score
  • Sleep apnoea notifications6
Display
  • Always-On Retina display with OLED and LTPO
  • Tough Ion-X front glass with 4x crack resistance7
  • 1,000 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 use8
  • Up to 32 hours in Low Power Mode8
  • Up to 7 hours outdoor workout9
  • Built‑in rechargeable lithium‑ion battery
  • Fast‑charge–capable10
  • Up to 80% charge in about 45 minutes10
  • 15 minutes for up to 8 hours of normal use11
  • 8 minutes for up to 8 hours of sleep tracking11

Learn more

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
  • Customised workouts
  • Customisable Workout Views
  • Training Load
  • Heart Rate Zones (customisable)
  • 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

Hiking
  • Compass with bearing, incline, elevation and coordinates
  • Customised waypoints
  • Automatically generated waypoints to mobile connectivity
  • Backtrack GPS data
  • Offline maps with customised route creation12

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
Safety
  • Emergency SOS13
  • International emergency calling14
  • Fall Detection13
  • Crash Detection13
  • Noise monitoring
  • Backtrack
  • Check In
Durability
  • Water resistance 50 m (swim-proof)15
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 Pay16
  • GymKit
  • Models A3326 and A3328
  • Supports RedCap for 5G17 and 4G LTE18

  • 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 Kids19
Accessibility

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

Learn more

Features include:
  • VoiceOver
  • Zoom
  • On/Off Labels
  • Reduce Transparency
  • Increase Contrast
  • Colour 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:

0° to 35° C (32° to 95° F)

Nonoperating storage temperature:

–20° to 45° C (−4° to 113° F)

Relative humidity:

5% to 90% noncondensing

Operating altitude:

0 m to 3,000 m (0 feet to 10,000 feet)

Apple Watch
and the
Environment

See the Apple Watch SE 3 Product Environmental Report (PDF)

Progress towards Apple 2030

Apple 2030 is our commitment to be carbon neutral for our entire carbon footprint. Our plan to decarbonise products is rigorous and focuses on transitioning to low-carbon electricity, designing with recycled and low-carbon materials, and prioritising lower-carbon ways of shipping products, like ocean freight.

See Apple’s commitment

Materials

Apple Watch SE 3 is made with 40% recycled content20, including:

  • 100% recycled aluminium in the case
  • 100% recycled cobalt and 95% recycled lithium in the battery
  • 100% recycled rare earth elements in all magnets
  • 100% recycled gold plating and tin solder in all Apple-designed printed circuit boards
  • 100% recycled tungsten in the Taptic Engine
  • 40% recycled glass in the display glass

Packaging

  • 100% fibre-based packaging21
  • Apple Watch SE 3 packaging designed to be compact, enabling 40% more units per trip compared to Apple Watch SE

Energy

  • 100% of manufacturing electricity for Apple Watch SE 3 is sourced from renewable electricity22
  • 100% of expected customer energy use matched with low-carbon electricity
  • Meets California Energy Commission’s energy efficiency standards for battery charger systems23

Waste

No established final assembly sites generate waste sent to landfill as part of Apple’s Zero Waste Program24

Smarter chemistry25

All of the materials used in Apple products, accessories and packaging are covered by the requirements of our Regulated Substances Specification, which was one of the first in industry to restrict the use of key substances of concern. See the latest Environmental Progress Report to understand Apple’s recent efforts in phasing out these chemistries.

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 (1 m)
Apple Watch SE 3, aluminium case, midnight colour, front exterior, edge-to-edge display, midnight colour Sport Band, Apple Watch Magnetic Fast Charger to USB-C Cable