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Apple Watch SE 3 · Apple official supplied product photograph; complete original canvas/background and native alpha retained.

Apple Watch SE 3
Photo 1 of 13

Apple Watch SE 3 · Apple official supplied product photograph; complete original canvas/background and native alpha retained.

Apple · Apple Watch

Watch SE 3

Released September 2025

The Apple Watch SE 3 is Apple's lower-priced smartwatch, in 40 mm and 44 mm aluminium cases, suited to first-time or younger Apple Watch users who want an always-on display, sleep apnoea notifications and safety features without paying for ECG or blood oxygen.

Model history · 3 models, 2020–2025
  1. 2020Watch SE (1st generation)Compare
  2. 2022Watch SE (2nd generation)Compare
  3. 2025Watch SE 3
Type
Smart and sports
Sizes
40, 44 mm
Movement
–
Power reserve
–
Display
LTPO OLED
Battery
18 h
Water
50 m
GPS
Single-band
Weight
26.3 g

What reviewers say

Reviewers agree it is the best Apple Watch for most people, gaining an always-on display, the same fast chip as the Series 11 and many more health and convenience features at a lower price. The common criticisms are the older design with thick bezels and the lack of ECG and some advanced health alerts; The Verge wished battery life were a little longer.

From techradar.com and theverge.com

Specifications

Report a wrong or missing spec

Display

Case sizes
40 mm or 44 mm
Panel
LTPO OLED
Peak brightness
1,000 nits
Always-on display
Yes
Display detail
Always-On Retina display with OLED and LTPO; 324 x 394 pixels (40mm) or 368 x 448 pixels (44mm) at 326 ppi; 759 or 977 sq mm display area; 2 nits minimum brightness
Screen protection
Ion-X front glass, 4x more crack resistant than SE 2

Health and fitness

ECG
No
Blood oxygen
No
Skin temperature
Yes
Sleep apnoea alerts
Yes
High blood pressure alerts
No
Body composition
No
Fall detection
Yes
Crash detection
Yes
GPS
Single-band
Water resistance
50 m
Sensors
Second-generation optical heart sensor; temperature sensor; compass; always-on altimeter; high-g accelerometer; high dynamic range gyroscope; ambient light sensor
Health features
Heart Rate app; high and low heart rate notifications; irregular rhythm notifications; sleep apnoea notifications; sleep stages and sleep score; Vitals app (heart rate, respiratory rate, wrist temperature and sleep duration); Cycle Tracking with fertile window and retrospective ovulation estimates, perimenopause and menopause support; Medications; Mindfulness; Noise
Fitness features
Custom workouts; Training Load; customisable heart rate zones; VO2 max; Race Route; Pacer; cadence, stride length, ground contact time, vertical oscillation and running power; automatic track detection; multisport workouts; offline maps with custom route creation; Backtrack; pool and open-water swimming with SWOLF; cycling power zones with Bluetooth accessories; GymKit
Safety features
Emergency SOS; international emergency calling; Fall Detection; Crash Detection; Check In; Backtrack; noise monitoring

Battery and connections

Battery life (maker's claim)
Up to 18 hours
In low-power mode
Up to 32 hours
Mobile data option
Yes
Works with
iPhone
Chip
S10
Storage
64 GB
Battery life detail
Up to 18 hours of normal use; up to 32 hours in Low Power Mode; up to 7 hours of outdoor workout
Charging
Fast charging to 80% in about 45 minutes; 15 minutes for up to 8 hours of normal use; 8 minutes for up to 8 hours of sleep tracking
Connectivity
Wi-Fi 4 (802.11n) at 2.4GHz; Bluetooth 5.3; NFC for Apple Pay; L1 GPS (GLONASS, Galileo, QZSS and BeiDou); GPS + Cellular models (A3326, A3328) with 5G RedCap and LTE

Design

Weight (lightest version)
26.3 g
Software
watchOS
Case materials
100% recycled aluminium case with nylon composite and sapphire crystal back; water resistant to 50 m (ISO 22810:2010)
Size
40mm is 40 x 34 x 10.7 mm, 26.3 g (GPS) or 26.4 g (GPS + Cellular); 44mm is 44 x 38 x 10.7 mm, 32.9 g (GPS) or 33.0 g (GPS + Cellular)
Bands
Fits 130–200 mm wrists (40mm) or 140–245 mm wrists (44mm)
Colours
Midnight or Starlight aluminium
In the box
Apple Watch SE 3, strap, Apple Watch Magnetic Fast Charger to USB-C Cable (1 m)

Pros and cons

Pros

  • Always-on display, S10 chip and 64GB, like the 2025 Series 11
  • Sleep apnoea notifications, wrist temperature, Fall Detection and Crash Detection
  • 5G on GPS + Cellular models

Cons

  • No ECG, blood oxygen or hypertension notifications
  • Up to 18 hours of normal use, the shortest of Apple's current watches
  • Ion-X glass rather than sapphire, 2.4GHz-only Wi-Fi and no Ultra Wideband

Closest rivals

Model
TypeSizesMovementPower reserveDisplayBatteryWaterGPSWeightReleased
AppleWatch Series 11
Smart and sports42, 46 mm––LTPO OLED24 h50 mSingle-band29.7 gSept 2025
AppleWatch Series 10
Smart and sports42, 46 mm––LTPO OLED18 h50 mSingle-band29.3 gSept 2024
AppleWatch Series 9
Smart and sports41, 45 mm––LTPO OLED18 h50 mSingle-band31.9 gSept 2023

Previous model: Watch SE (2nd generation).

Sources

  1. apple.com/uk/apple-watch-se-3/specs
  2. support.apple.com/en-gb/125094
  3. apple.com/uk/newsroom/2025/09/apple-introduces-apple-watch-se-3
  4. apple.com/uk/watch/compare
  5. apple.com/uk/shop/buy-watch/apple-watch-se
  6. apple.com/uk/watchos/feature-availability

Photo: Apple official supplied product photograph; complete original canvas/background and native alpha retained.

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