Apple Watch Ultra 3 Technical Specifications
- Height: 49mm
- Width: 44mm
- Depth: 12mm
- 422 by 514 pixels
- 1245 sq mm display area
- Weight (natural): 61.6 grams
- Weight (black): 61.8 grams
- Fits 130–210mm wrists
- Microphone
- Speaker
- Customizable Action button
- Siren/Speaker
- Antennas (GPS, cellular/satellite)
- Microphone
- Side button
- Microphone
- Digital Crown
- Depth gauge/Water temperature sensor/Altimeter
- Customizable Action button
- Digital Crown with haptic feedback
- Side button
- Double tap and wrist flick gestures
- Siri with on‑device processing
- S10 chip with 64-bit dual-core processor
- 4-core Neural Engine
- 64GB capacity
- Blood Oxygen app1
- ECG app3
- Cycle Tracking app with retrospective ovulation estimates4
- Heart Rate app
- High and low heart rate notifications
- Irregular rhythm notifications5
- Medications app
- Mindfulness app with state of mind tracking
- Noise app
- Sleep app including sleep stages
- Sleep score
- Sleep apnea notifications6
- Hypertension notifications7
- Always‑On Retina display with wide‑angle OLEDs and LTPO3
- 1Hz refresh
- Active area (422 by 514 pixels, 326 pixels per inch)
- Flat sapphire crystal display
- Up to 3000 nits peak brightness
- 1 nit minimum brightness
- Night Mode for Apple Watch Ultra faces (Modular Ultra, Wayfinder, Orienteering)
- Three-microphone array with beamforming and wind noise mitigation
- Dual speakers
- Media playback
- Siren

- Custom workouts
- Customizable Workout Views
- Training Load / Workout Effort Tracking
- Heart Rate Zones (customizable)
- Postworkout heart rate
- VO2 max
- Race Route
- Pacer
- Precision Start using Action button
- Stride Length, Ground Contact Time, Cadence, Power, and Vertical Oscillation
- Automatic track detection
- Multisport workout

- Compass with bearing, incline, elevation, and coordinates
- Custom waypoints
- Automatically generated waypoints to cellular connectivity
- Backtrack GPS data
- Offline maps with custom route creation
- Elevation alerts
- Topographic maps for thousands of national and regional parks (U.S. only)
- Hundreds of curated hikes across all 63 U.S. national parks
- Siren

- Custom workouts
- Customizable Workout Views
- Training Load / Workout Effort Tracking
- Average speed, elevation gained, and distance
- Bluetooth-compatible with power meters
- Functional Threshold Power (with power meter connection)
- Live Activity on iPhone
- Heart Rate Zones (customizable)
- Cadence (rpm), speed (mph), power (watts), power zones (with power meter connection)
- Postworkout heart rate

- Custom workouts (pool swim) with haptics to cue the next interval
- Customizable Workout Views (pool swim, open water swim)
- Splits and auto sets
- SWOLF score
- Automatic stroke and count detection (including kickboard)
- Water temperature
- Average pace, total distance, heart rate, and laps

- Recreational dive to 40m
- Dive computer app (available on the App Store)11
- Automatic launch at 1m
- Current and maximum depth duration
- GPS entry and exit points
- Depth gauge
- Water temperature sensor
- Water resistance 100m (swim, snorkel, scuba, high-speed water sports) under ISO standard 22810:201015
- Dust resistance IP6X under IEC 6052916
- EN13319 recreational scuba diving to 40m (±1m accuracy)
- Tested to MIL-STD 810H against subsections for altitude, high temperature, low temperature, temperature shock, immersion, freeze with thaw, ice and freezing rain, and shock and vibration
- Model A3281:
- Supports RedCap for 5G19 and LTE20
- FDD‑5G NR (Bands n1, n2, n3, n5, n7, n8, n12, n14, n20, n25, n26, n28, n66, n71)
- TDD‑5G NR (Bands n38, n40, n41, n53)
- FDD‑LTE (Bands 1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 17, 18, 19, 20, 25, 26, 28, 66, 71)
- TDD‑LTE (Bands 38, 39, 40, 41, 53)
- Support for Apple Watch For Your Kids21
- International roaming22
Built-in accessibility features supporting vision, mobility, hearing, and cognitive disabilities.
- 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
- Audio Transcription
- Live Speech
- Accessibility Shortcut
- Mono Audio
- Taptic Time
- Personal Voice
- Live Listen
–4° to 130° F (–20° to 55° C)
32° to 95° F (0° to 35° C)
–4° to 113° F (–20° to 45° C)
32° to 104° F (0° to 40° C)
5% to 90% noncondensing
–1600 feet to 29,500 feet (–500m to 9000m)