Apple Watch SE 3 Technical Specifications

Material and Finish

Aluminium case

Starlight, Midnight

Size and Weight
  • Height: 44mm
  • Width: 38mm
  • Depth: 10.7mm
  • 368x448 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
  • 324x394 pixels
  • 759 sq mm display area
  • Weight (GPS): 26.3 grams
  • Weight (GPS + Cellular): 26.4 grams
  • Fits 130–200mm wrists
Hardware and Buttons

Digital Crown

Microphone

Side button

Speaker / air vent

Optical heart sensor

Controls
  • Digital Crown with haptic feedback
  • Side button
  • Double tap and wrist flick gestures
  • Faster on-device 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 sensor1
  • Compass
  • Always-on altimeter
  • High-g accelerometer
  • High dynamic range gyroscope
  • Ambient light sensor
Health and Wellness
  • Cycle Tracking app with retrospective ovulation estimates2
  • Heart Rate app
  • High and low heart rate notifications
  • Irregular rhythm notifications3
  • Medications app
  • Mindfulness app
  • Noise app
  • Sleep app including sleep stages
  • Sleep score
  • Sleep apnoea notifications4
Display
  • Always-On Retina display with OLED and LTPO
  • Tough Ion-X front glass with 4x crack resistance5
  • 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 use6
  • Up to 32 hours in Low Power Mode6
  • Built‑in rechargeable lithium‑ion battery
  • Fast‑charge capable7
  • Up to 80% charge in about 45 minutes7
  • 15 minutes for up to 8 hours of normal use8
  • 8 minutes for up to 8 hours of sleep tracking8

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
  • Custom 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
  • 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 (US only)
  • Hundreds of curated hikes across all 63 US 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 lengths

More Workouts
Safety
  • Emergency SOS9
  • International emergency calling10
  • Crash Detection9
  • Fall Detection
  • Noise monitoring
  • Backtrack
Durability
  • Water resistance 50m (swimproof)11
Connectivity
  • L1 GPS, GNSS, Galileo and QZSS
  • 5G12 and LTE13
  • Wi-Fi 4 (802.11n)
  • Support for 2.4GHz Wi‑Fi networks
  • Bluetooth 5.3
  • Apple Pay14
  • GymKit
  • Support for Apple Watch For Your Kids15
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)

Non-operating storage temperature:

–20° to 45° C (–4° to 113° F)

Relative humidity:

5% to 90% non‑condensing

Operating altitude:

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

Apple Watch
and the Environment

Apple Watch SE 3 is designed to reduce environmental impact:16

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 sea freight.

See Apple’s commitment

Materials

Apple Watch SE 3 is made with 40% recycled content,17 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 electricity18
  • 100% of expected customer energy use matched with low-carbon electricity
  • Meets California Energy Commission’s energy efficiency standards for battery charger systems19

Packaging

  • 100% fibre-based packaging20
  • Apple Watch SE 3 packaging is 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 Programme21

Smarter chemistry22

All 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
  • Strap
  • Apple Watch Magnetic Fast Charger to USB‑C Cable (1m)
Apple Watch SE 3, aluminum case, midnight color, front exterior, edge-to-edge display, midnight color Sport Band, Apple Watch Magnetic Fast Charger to USB-C Cable