Apple Watch SE 3 Technical Specifications

Material and Finish

Aluminium case

Starlight, Midnight

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
  • Double tap and wrist flick gestures1
  • Siri
Chip
S10 chip
  • S10 chip with 64‑bit dual core processor
  • 4‑core Neural Engine
  • 64GB capacity
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
  • Cycle Tracking app with retrospective ovulation estimates3
  • Heart Rate app
  • High- and low-heart-rate notifications
  • Irregular rhythm notifications4
  • Medications app
  • Mindfulness app
  • Noise app
  • Sleep app including sleep stages
  • Sleep score
  • Sleep apnoea notifications5
Display
  • Always-On Retina display with OLED and LTPO
  • Tough Ion-X front glass with 4x crack resistance6
  • Up to 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 use7
  • Up to 32 hours in Low Power Mode7
  • Built‑in rechargeable lithium‑ion battery
  • Fast‑charge–capable8
  • Up to 80% charge in about 45 minutes8
  • 15 minutes for up to 8 hours of normal use9
  • 8 minutes for up to 8 hours of sleep tracking9

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
  • Race Route
  • Pacer
  • Stride Length, Ground Contact Time and Vertical Oscillation
  • Automatic track detection
  • Multisport workout

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

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 SOS10
  • International emergency calling11
  • Crash Detection10
  • Fall Detection
  • Noise monitoring
  • Backtrack
Durability
  • Water resistance 50 m (swim-proof)12
Connectivity
  • L1 GPS, GNSS, Galileo and QZSS
  • 4G LTE13
  • Wi-Fi 4 (802.11n)
  • Support for 2.4GHz Wi-Fi networks
  • Bluetooth® 5.3
  • Apple Pay14
  • GymKit
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

Apple Watch SE 3 is designed to reduce environmental impact:15

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 content16, 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

Energy

  • 100% of manufacturing electricity for Apple Watch SE 3 is sourced from renewable electricity17
  • 100% of expected customer energy use matched with low-carbon electricity
  • Meets California Energy Commission’s energy efficiency standards for battery charger systems18

Packaging

  • 100% fibre-based packaging19
  • Apple Watch SE 3 packaging designed to be compact, enabling 40% more units per trip compared to Apple Watch SE

Waste

No established final assembly sites generate waste sent to landfill as part of Apple’s Zero Waste Program20

Smarter chemistry21

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 26 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, front exterior, edge-to-edge display, midnight colour Sport Band, Apple Watch Magnetic Fast Charger to USB-C Cable