Apple Watch SE 3 Specifications
Design & Build
| Case size(s) | 40 mm / 44 mm |
|---|---|
| Variants (India) | 40 mm, GPS 40 mm, GPS + Cellular 44 mm, GPS 44 mm, GPS + Cellular |
| Dial shape | Rectangular |
| Dimensions (H × W × T) | 40 mm: 40 × 34 × 10.7 mm 44 mm: 44 × 38 × 10.7 mm |
| Weight | 40 mm: 26.3 g (GPS), 26.4 g (GPS + Cellular) 44 mm: 32.9 g (GPS), 33.0 g (GPS + Cellular) |
| Case material | Aluminium (100% recycled) |
| Display glass / lens | Ion-X front glass (4x crack resistance vs SE 2) |
| Strap material | Fluoroelastomer (Sport Band) |
| Strap width / size | 40 mm: fits 130–200 mm wrists 44 mm: fits 140–245 mm wrists |
| Water & dust resistance | Water resistant to 50 m (ISO 22810:2010), swimproof |
| Colour options | Midnight, Starlight |
| Buttons / crown | Digital Crown with haptic feedback, side button; double tap and wrist flick gestures |
| Operating temperature | 0° to 35° C |
| Operating altitude | 0 to 3,000 m |
| Relative humidity | 5% to 90% non-condensing |
Display
| Display type | LTPO OLED (Always-On Retina) |
|---|---|
| Resolution | 40 mm: 324 × 394 pixels 44 mm: 368 × 448 pixels |
| Pixel density | 326 ppi |
| Peak brightness | 1,000 nits |
| Always-on display | Yes |
| Minimum brightness | 2 nits |
| Display area | 40 mm 759 sq mm; 44 mm 977 sq mm |
Performance & Software
| Chipset / processor | Apple S10 (64-bit dual-core) |
|---|---|
| Storage | 64 GB |
| Operating system | watchOS |
| Phone compatibility | iPhone 11 or later, including iPhone SE (2nd generation or later), with iOS 26 or later |
| AI features | Siri powered by Apple Intelligence |
| Neural Engine | 4-core |
Connectivity
| Bluetooth | Bluetooth 5.3 |
|---|---|
| Wi-Fi | Wi-Fi 4 (802.11n), 2.4 GHz |
| Cellular / eSIM | GPS + Cellular models: 5G (RedCap) and LTE GPS models: No |
| GPS / GNSS | Built-in L1 GPS (GLONASS, Galileo, QZSS, BeiDou) |
| 5G bands (cellular) | FDD n1, n2, n3, n5, n7, n8, n12, n14, n20, n25, n26, n28, n66, n71; TDD n38, n40, n41 |
| LTE bands (cellular) | FDD 1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 17, 18, 19, 20, 25, 26, 28, 66, 71; TDD 38, 39, 40, 41 |
Calling & Audio
| Bluetooth calling | Yes (make and take calls from the watch) |
|---|---|
| Speaker | Yes |
| Microphone | Yes |
| Voice assistant | Siri |
Health Tracking
| Heart rate | Heart Rate app; high and low heart rate notifications; irregular rhythm notifications |
|---|---|
| Skin temperature | Wrist temperature (temperature sensor) |
| Sleep tracking | Sleep tracking with sleep stages and sleep score |
| Women's health | Advanced Cycle Tracking with fertile window estimates, retrospective ovulation estimates, perimenopause and menopause support |
| Other | Sleep apnoea notifications |
| Vitals | overnight heart rate, respiratory rate, wrist temperature, sleep duration |
| Apps | Medications, Mindfulness, Noise |
Sports & Fitness
| Training insights | Training Load, heart rate zones, VO2 max, Pacer, Race Route, custom workouts |
|---|---|
| Swimming tracking | Pool and open-water swim tracking; splits, auto sets, SWOLF, stroke and kickboard detection |
| Maps & navigation | Backtrack, compass waypoints, offline maps |
| Running | cadence, stride length, ground contact time, vertical oscillation, running power |
| Cycling | Functional Threshold Power, Power Zones, cadence, Bluetooth cycling accessories |
| Hiking | compass bearing, incline, elevation, coordinates |
| Gym | GymKit |
| Other workouts | skiing, snowboarding, rowing, paddling, golf, HIIT, yoga, Pilates, Tai Chi, dance, wheelchair, kickboxing, multisport |
Sensors
| Sensors | Second-generation optical heart sensor, Temperature sensor, Compass, Always-on altimeter, High-g accelerometer, High dynamic range gyroscope, Ambient light sensor |
|---|
Smart Features
| Notifications | Notifications on the Always-On display; double tap answers calls and sends texts; wrist flick dismisses notifications; dictate messages |
|---|---|
| Music | Music and podcast playback through speaker |
| Contactless payments | Yes (Apple Pay) |
| Emergency SOS / fall detection | All models: Emergency SOS, Fall Detection, Crash Detection, Check In, Noise monitoring GPS + Cellular models: international emergency calling; GPS models: No |
| Find my phone | Yes (Ping iPhone) |
| Family setup | Apple Watch For Your Kids (cellular models) |
Battery & Charging
| Battery life (typical) | Up to 18 hours (normal use) |
|---|---|
| Battery life (heavy use / GPS) | Up to 7 hours (workout tracking) |
| Charging method | Magnetic fast charger (USB-C) |
| Charging time | About 75 minutes (100%) |
| Fast charging | Up 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 |
| Low Power Mode | Up to 32 hours |
| Battery type | Lithium-ion |
In the Box & Warranty
| Box contents | Apple Watch SE 3, strap, Apple Watch Magnetic Fast Charger to USB-C Cable (1 m) |
|---|---|
| Warranty | 1 year |
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