apple-watch-se-3-hero

Apple Watch SE 3 - Tech Specs

Year introduced: 2025

Material and Finish

Aluminum case

  • Starlight

  • Midnight

Size and Weight

  • 44mm

  • Height: 44mm

  • Width: 38mm

  • Depth: 10.7mm

  • 368 by 448 pixels

  • 977 sq mm display area

  • Weight (GPS): 32.9 grams

  • Weight (GPS + Cellular): 33.0 grams

  • Fits 140–245mm wrists

  • 40mm

  • Height: 40mm

  • Width: 34mm

  • Depth: 10.7mm

  • 324 by 394 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

  • Siri with on‑device processing

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 apnea notifications4

Display

  • Always-On Retina display with OLED and LTPO

  • Tough Ion-X front glass with 4x crack resistance5

  • Up to 1000 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 about Power and Battery Life

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

  • Customizable 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 (U.S. only)

  • Hundreds of curated hikes across all 63 U.S. 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 laps

More Workouts

  • Skiing

  • Snowboarding

  • Outdoor Rowing

  • Paddling

  • Golf

  • Walk

  • Elliptical

  • Rower

  • Stair Stepper

  • HIIT

  • Yoga

  • Functional Stength Training

  • Dance

  • Cooldown

  • Core Training

  • Pilates

  • Tai Chi

  • Wheelchair

  • Kickboxing

  • Multisport

  • Other

Safety

  • Emergency SOS9

  • International emergency calling10

  • Crash Detection9

  • Fall Detection

  • Noise monitoring

  • Backtrack

Durability

Water resistance 50m (swimproof)11

Connectivity

  • L1 GPS, GLONASS, Galileo, QZSS, and BeiDou

  • Supports RedCap for 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

  • International roaming16

Accessibility

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

Learn more about Accessibility

Features include:

  • VoiceOver

  • Zoom

  • On/Off Labels

  • Reduce Transparency

  • Increase Contrast

  • Color 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: 32° to 95° F (0° to 35° C)

  • Nonoperating storage temperature: –4° to 113° F (–20° to 45° C)

  • Relative humidity: 5% to 90% noncondensing

  • Operating altitude: 0 feet to 10,000 feet (0m to 3000m)

Apple Watch and the Environment

Apple Watch SE 3 is designed to reduce environmental impact:17

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

Progress toward Apple 2030

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

See Apple's commitment

Materials

Apple Watch SE 3 is made with 40% recycled content,18 including:

  • 100% recycled aluminum 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 electricity19

  • 100% of expected customer energy use matched with low-carbon electricity

  • Meets California Energy Commission’s energy efficiency standards for battery charger systems20

Packaging

  • 100% fiber-based packaging21

  • 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 Program22

Smarter chemistry23

  • 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 (1m)

  1. The temperature sensing feature is not intended for medical use. Temperature sensing is available only on Apple Watch Series 8 and later, Apple Watch SE 3, and all Apple Watch Ultra models.

  2. The Cycle Tracking app should not be used for birth control or to diagnose a health condition.

  3. Irregular rhythm notification requires the latest version of watchOS and iOS. It is not intended for use by people under 22 years old or those who have been previously diagnosed with atrial fibrillation (AFib).

  4. Sleep apnea notifications are available on Apple Watch Series 9 and later, Ultra 2 and later, and SE 3. The feature is intended to detect signs of moderate to severe sleep apnea for people 18 years old or older without a diagnosis of sleep apnea.

  5. Apple Watch SE 3 Ion-X glass is 4x more crack resistant than Apple Watch SE 2.

  6. All-day battery life is based on the following use: 300 time checks, 90 notifications, 15 minutes of app use, and a 60-minute workout with music playback from Apple Watch via Bluetooth, over the course of 18 hours; Apple Watch SE 3 (GPS) usage includes connection to iPhone via Bluetooth during the entire 18-hour test; Apple Watch SE 3 (GPS + Cellular) usage includes a total of 4 hours of cellular connection and 14 hours of connection to iPhone via Bluetooth over the course of 18 hours. Battery life in Low Power Mode including sleep tracking is based on the following use: 430 time checks, 130 notifications, 20 minutes of app use, a 60-minute workout with music playback from Apple Watch via Bluetooth, and 6 hours of sleep tracking over the course of 32 hours; Apple Watch SE 3 (GPS) usage includes connection to iPhone via Bluetooth during the entire 32-hour test; Apple Watch SE 3 (GPS + Cellular) usage includes on-demand cellular connection and 24 hours of connection to iPhone via Bluetooth over the course of 32 hours. Testing conducted by Apple in July and August 2025 using preproduction Apple Watch SE 3 (GPS) and Apple Watch SE 3 (GPS + Cellular), each paired with an iPhone; all devices tested with prerelease software. Battery life varies by use, configuration, cellular network, signal strength, and many other factors; actual results will vary.

  7. Charge times are from 0–80% and 0–100% using the included Apple Watch Magnetic Fast Charger to USB-C Cable. Testing conducted by Apple in July and August 2025 using preproduction Apple Watch SE 3 (GPS) and Apple Watch SE 3 (GPS + Cellular), each paired with an iPhone; all devices tested with prerelease software, Apple Watch Magnetic Fast Charger to USB-C Cable (Model A2515), and Apple 20W USB-C Power Adapter (Model A2305). Fast-charge testing conducted with drained Apple Watch units. Times measured from the appearance of the Apple logo as the unit started up. Charge time varies with adapter, region, settings, initial battery levels, usage, and environmental factors; actual results will vary.

  8. Testing conducted by Apple in July and August 2025 using preproduction Apple Watch SE 3 (GPS) and Apple Watch SE 3 (GPS + Cellular), each paired with an iPhone; all devices tested with prerelease software, Apple Watch Magnetic Fast Charger to USB-C Cable (Model A2515), and Apple 20W USB-C Power Adapter (Model A2305). Charge time varies with adapter, region, settings, initial battery levels, usage, and environmental factors; actual results will vary.

  9. Emergency SOS requires a cellular connection or Wi-Fi calling with an internet connection from your Apple Watch or nearby iPhone. You can use cellular models of Apple Watch to make an emergency call in many locations, provided that cellular service is available. Some cellular networks may not accept an emergency call from your Apple Watch if your Apple Watch isn’t activated, if it isn’t compatible with or configured to operate on a particular cellular network, if it isn’t set up for cellular service, or if the cellular network does not support emergency calling over IMS. See support.apple.com/108374 and apple.com/watch/cellular for more information.

  10. International emergency calling requires an Apple Watch Series 5 (GPS + Cellular), Apple Watch SE (GPS + Cellular), Apple Watch Ultra, or later. For a list of supported countries and regions, see apple.com/watchos/feature-availability.

  11. Apple Watch SE 3 has a water resistance rating of 50 meters under ISO standard 22810:2010. This means that it may be used for shallow-water activities like swimming in a pool or ocean. Apple Watch SE 3 should not be used for scuba diving, waterskiing, or other activities involving high-velocity water or submersion below shallow depth. Water resistance is not a permanent condition and can diminish over time. For additional information, see support.apple.com/109522.

  12. Data plan required. 5G is available in select markets and through select carriers. Speeds vary based on site conditions and carrier. For details on 5G support, contact your carrier and see apple.com/watch/cellular.

  13. Wireless service plan required for cellular service. Contact your service provider for more details. Connection may vary based on network availability. Check apple.com/watch/cellular for participating wireless carriers and eligibility. See support.apple.com/HT207578 for additional setup instructions.

  14. To use Apple Pay you need a supported card from a participating card issuer. To check if your card is compatible with Apple Pay, contact your card issuer. Apple Pay is not available in all markets. View Apple Pay countries and regions.

  15. Not all features will be available if the Apple Watch is set up through Apple Watch For Your Kids. Check support.apple.com/109036 for details. Wireless service plan required for cellular service. Check apple.com/watch/cellular for participating wireless carriers and eligibility.

  16. International roaming coverage is determined by your carrier. Please check with your carrier for details. For a list of supported carriers, see apple.com/watch/cellular.

  17. Data accurate as of product launch.

  18. Product recycled or renewable content is the mass of certified recycled material relative to the overall mass of the device, not including packaging or in‑box accessories.

  19. Our manufacturing electricity is sourced from clean electricity, including a mix of supplier and Apple clean energy projects.

  20. Apple Watch SE 3 meets California Energy Commission’s Energy Efficiency Standards for Small Battery Charger Systems as outlined in the California Code of Regulations.

  21. Based on retail packaging as shipped by Apple. Breakdown of U.S. retail packaging by weight. Adhesives, inks, and coatings are excluded from our calculations of plastic content and packaging weight.

  22. All established final assembly supplier sites — those that have been Apple suppliers for more than one year — for Apple Watch SE 3 are third-party verified as Zero Waste by UL LLC (UL 2799 Standard). UL requires at least 90% diversion through methods other than waste to energy to achieve Zero Waste to Landfill (Silver 90–94%, Gold 95–99%, and Platinum 100%) designations.

  23. Apple’s Regulated Substances Specification describes Apple’s restrictions on the use of certain chemical substances in materials in Apple products, accessories, manufacturing processes, and packaging used for shipping products to Apple’s end‑customers. Restrictions are derived from international laws or directives, regulatory agencies, eco‑label requirements, environmental standards, and Apple policies. Every Apple product is free of PVC and phthalates except for AC power cords in India, Thailand (for two‑prong AC power cords), and South Korea, where we continue to seek government approval for our PVC and phthalates replacement. Apple products comply with the European Union Directive 2011/65/EU and its amendments, including exemptions for the use of lead such as high‑temperature solder. Apple is working to phase out the use of these exempted substances for new products where technically possible.

Apple Watch Ultra 3, Apple Watch Series 11, and Apple Watch SE 3 require iPhone 11 or later with iOS 26 or later.

Features are subject to change. Some features, applications, and services may not be available in all regions or all languages. View complete list.