The Apple Watch Ultra 3 in a titanium case with an Ocean band, showing its large, bright watch face.
Apple Watch Ultra 3 is Apple's rugged flagship smartwatch for 2025, announced on September 9, 2025, alongside the Apple Watch Series 11.
It went on sale on September 19, 2025, keeping the same $799 starting price as the Ultra 2 while adding satellite messaging, 5G, and longer battery life.
The headline upgrades are two-way satellite communication when cellular coverage fails, a brighter wide-angle display, and up to 42 hours of normal use.
Here are the full specifications, key features, and price of the Apple Watch Ultra 3, plus buying advice for athletes, divers, and outdoor explorers.
Key Highlights of Apple Watch Ultra 3
Satellite messaging built in: The Ultra 3 sends Emergency SOS texts, messages, and location updates via satellite when cellular and Wi-Fi are unavailable.
Largest, brightest Apple Watch display: The wide-angle LTPO3 OLED screen reaches 3,000 nits peak brightness and stays readable from sharp viewing angles outdoors.
Up to 42 hours of battery life: Apple rates the watch for 42 hours of normal use, or up to 72 hours in Low Power Mode.
5G cellular as standard: Every Ultra 3 includes GPS plus cellular with 5G RedCap, so calls, maps, and music work without carrying an iPhone nearby.
Hypertension notifications: A 30-day optical heart sensor algorithm alerts wearers to possible signs of chronic high blood pressure for follow-up checks.
Dive-ready rugged design: The 49 mm titanium case is water resistant to 100 metres and certified for recreational diving down to 40 metres.
Design and Display
Apple kept the familiar Ultra shape, with a flat sapphire crystal, raised crown guard, and a customizable orange Action Button on the side.
The case uses Grade 5 titanium in Natural or Black finishes, measuring 49 mm tall, 44 mm wide, and 12 mm deep, and weighing about 62 grams.
That size suits larger wrists best, though the watch fits wrists from 130 mm to 210 mm depending on the band chosen.
The Always-On Retina display uses wide-angle LTPO3 OLED technology, with a 422 x 514 resolution and a 1,245 square millimetre display area.
Peak brightness reaches 3,000 nits, while the display can dim to just 1 nit at night, so it stays readable in sunlight and gentle in darkness.
Night Mode turns supported Ultra watch faces red in the dark, reducing glare during night runs, camping, and early-morning starts.
The toughest Apple Watch ever made, now with a safety net that works off the grid.
Performance and watchOS
The S10 SiP chip pairs a 64-bit dual-core processor with a 4-core Neural Engine, giving smooth animations and fast on-device Siri responses.
It ships with 64 GB of storage for apps, music, and podcasts, so workouts and offline playlists work without an iPhone in range.
The watch launched with watchOS 26, bringing the Liquid Glass design, a sleep score, Workout Buddy coaching, and a smarter Smart Stack.
Double Tap lets wearers answer calls, pause music, or snooze alarms with a finger pinch, which is handy when hands are busy or gloved.
Connectivity covers dual-frequency GPS, 5G RedCap cellular, Wi-Fi 4, Bluetooth 5.3, second-generation Ultra Wideband, and NFC for Apple Pay.
The watch requires an iPhone 11 or later running iOS 26, and cellular features need a compatible mobile plan from a supported carrier.
Health, Safety, and Fitness
Health sensors include a third-generation optical heart sensor, an electrical heart sensor for ECG, blood oxygen sensing, and wrist temperature sensing.
The ECG app checks heart rhythm for signs of atrial fibrillation, while high and low heart rate alerts warn wearers about unusual readings.
Sleep tracking now adds a sleep score, sleep stages, and sleep apnea notifications, helping wearers spot patterns worth discussing with a doctor.
Hypertension notifications analyze blood vessel responses over 30-day periods, but they are a screening aid, not a replacement for a blood pressure cuff.
Safety features include fall detection, crash detection, an 86-decibel siren, and Emergency SOS, which can now reach help via satellite.
Messages via satellite lets wearers send texts, emoji, and Tapbacks to friends and family, while Find My via satellite shares location every 15 minutes.
Satellite features are free for two years after activation, though Find My via satellite requires an active cellular plan to function.
For athletes, dual-frequency GPS improves route accuracy in cities and forests, and the watch tracks running, cycling, swimming, hiking, and diving.
The Depth app shows depth and water temperature during dives, and the Oceanic+ app turns the watch into a full recreational dive computer.
Battery and Charging
Apple rates the Ultra 3 for up to 42 hours of normal use, up from 36 hours on the Ultra 2, thanks to a reengineered battery and efficient radios.
Low Power Mode extends that rating to 72 hours as a smartwatch, or about 35 hours for an outdoor workout with GPS running.
Continuous GPS workout tracking lasts up to 14 hours, which covers most ultramarathons, long hikes, and full days on the water.
Fast charging reaches about 80 percent in around 45 minutes, so a short charge before a workout or bedtime adds many hours of use.
Who Should Buy the Apple Watch Ultra 3
The Ultra 3 suits endurance athletes, hikers, divers, and outdoor workers who need a tough watch, long battery life, and accurate GPS tracking.
It also suits anyone who spends time beyond cellular coverage, since satellite messaging adds a genuine safety layer other Apple Watches lack.
Casual wearers who mainly want notifications and health tracking may prefer the cheaper, smaller, and lighter Apple Watch Series 11 instead.
Ultra 2 owners should upgrade mainly for satellite features, 5G, and battery life, since the case, sensors, and overall design are similar.
Buyers should budget for a cellular plan and check band sizes, because the 49 mm case feels large on smaller wrists.
Frequently Asked Questions About the Apple Watch Ultra 3
Does the Apple Watch Ultra 3 work without an iPhone nearby? Yes, with a cellular plan it makes calls, streams music, and uses maps independently, though setup needs an iPhone.
Can the Apple Watch Ultra 3 send satellite messages? Yes, it sends Emergency SOS texts, Messages texts, and Find My locations via satellite when cellular and Wi-Fi coverage are unavailable.
Is the Apple Watch Ultra 3 good for diving? Yes, it is water resistant to 100 metres and EN13319 certified for diving to 40 metres, with depth and temperature sensors.
Apple Watch Ultra 3 Full Specifications
| Display | Always-On Retina wide-angle LTPO3 OLED, 422 x 514 pixels, 1,245 sq mm area, up to 3,000 nits peak, 1 nit minimum, flat sapphire crystal |
| Chip | Apple S10 SiP (64-bit dual-core processor, 4-core Neural Engine) |
| Storage | 64 GB |
| Sensors | Third-generation optical heart sensor, electrical heart sensor (ECG), blood oxygen sensor, temperature sensor, depth gauge, water temperature sensor, compass, always-on altimeter, high-g accelerometer, high dynamic range gyroscope, ambient light sensor |
| Connectivity | Dual-frequency GPS (L1/L5), 5G RedCap + LTE cellular, Wi-Fi 4, Bluetooth 5.3, Ultra Wideband 2, NFC (Apple Pay), satellite messaging and SOS |
| Battery | Up to 42 hours normal use; up to 72 hours in Low Power Mode; up to 14 hours continuous GPS workout |
| Charging | Fast charging, about 80% in around 45 minutes (magnetic fast-charge puck) |
| Build | 49 x 44 x 12 mm, 61.6 g (Natural Titanium) / 61.8 g (Black Titanium), Grade 5 titanium case, MIL-STD 810H tested |
| Water Resistance | WR100 (100 metres), EN13319 certified for recreational diving to 40 metres, IP6X dust resistant |
| OS | watchOS 26 at launch; requires iPhone 11 or later with iOS 26 |
| Colors | Natural Titanium, Black Titanium (Ocean, Trail, and Alpine bands sold separately and in bundles) |
| Price | From $799 (US); from £749 (UK); from €899 (Europe) |
Price and Availability
The Apple Watch Ultra 3 launched in the US at $799 for the 49 mm GPS + Cellular model, with band choice affecting the final price.
In the UK it launched at £749, while European pricing started at €899, with exact prices varying by band and retailer.
Pre-orders opened on September 9, 2025, and the watch went on general sale on September 19, 2025, through Apple stores and major retailers.
Buyers should compare current deals before paying full price, since the Ultra 3 is now regularly discounted as newer Apple Watch models arrive.
For athletes and adventurers who want the toughest Apple Watch with satellite safety and multi-day battery life, the Ultra 3 remains an easy recommendation.