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Apple Apple Watch Ultra 3 49mm

49 mm44 mm12 mm
Released
2025-09-19Apple UK Newsroom — Apple Watch Ultra 3, retrieved 2026-09-13
Price
RRP not on file

The Apple Watch Ultra 3 49mm went on sale on 19 September 2025. It has a weight of 61.6 g, the S10 SiP chip and 64 GB of storage to start. Apple claims up to 42 hours per charge. Apple publishes no end date for its security updates. Every figure in the Apple Watch Ultra 3 49mm specifications below links the page it came from and the date it was read.

Battery life (maker's claim)

42h

Official

Case size

49mm

Official

Weight (case only)

61.6g

Official

Water rating

Water resistance 100m (swim, snorkel, scuba, high-speed water sports) under ISO standard 22810:2010; EN13319 recreational scuba diving to 40m

Official

Works with

Works with an iPhone only.

Apple’s own words: “iPhone 11 or later, including iPhone SE (2nd generation or later), with iOS 26 or later”Apple Support — Apple Watch Ultra 3 Tech Specs, retrieved 2026-09-13

UK networks whose own pages list eSIM support for the cellular model: EE, Vodafone, O2, Three.Vodafone UK — eSIM-compatible devices, retrieved 2026-09-13

Specifications

Every figure carries its source, linked and dated.

Body

Dimensions
49 x 44 x 12 mmOfficial
Case size
49mmOfficial
Case shape
rectangularOfficial
Weight (case only)
61.6gOfficial
Case material
TitaniumOfficial
Water rating
Water resistance 100m (swim, snorkel, scuba, high-speed water sports) under ISO standard 22810:2010; EN13319 recreational scuba diving to 40mOfficial

Display

Display type
Always-On Retina display with wide-angle OLEDs and LTPO3Official
Display area
1245mm²Official
Resolution
422 x 514Official
Peak brightness
3000nitsOfficial
Always-on display
YesOfficial

Platform

Operating system
watchOS 26Official

Apple UK Newsroom — Apple Watch Ultra 3, published 2025-09-09 · retrieved 2026-09-13

Chip
S10 SiPOfficial
Storage
64GBOfficial

Battery

Battery life (maker's claim)
42hOfficial
Battery capacity
599mAh3rd party
Charge to 80%
45minOfficial
Charging
Fast-charge capable, Apple Watch Magnetic Fast Charger to USB-C CableOfficial

Health

Sensors
Electrical heart sensor, third-generation optical heart sensor, blood oxygen sensor, temperature sensor, depth gauge, water temperature sensor, compass, always-on altimeter, high-g accelerometer, high dynamic range gyroscope, ambient light sensorOfficial
ECG
YesOfficial
Blood oxygen
YesOfficial
Skin temperature
YesOfficial
GPS
L1 and L5 precision dual-frequency GPS (GPS, GLONASS, Galileo, QZSS and BeiDou)Official

Connectivity

Cellular model
YesOfficial
UK networks with eSIM
EE, Vodafone, O2, Three3rd party
Wi-Fi
Wi-Fi 4 (802.11n)Official
Bluetooth
5.3Official
NFC payments
YesOfficial

Compatibility

Works with
iPhone 11 or later, including iPhone SE (2nd generation or later), with iOS 26 or laterOfficial
Compatibility
iPhone onlyOfficial
5 attributes without a sourced figure yet

Strap width · Display size · RAM · Blood pressure · Cellular model price. A gap in our data, not a statement about the watch — rows appear as sources are cited.

What it actually costs

New against used, and what the same shop pays for the watch on your wrist.

Used, Grade A

£520

CeX, read 2026-10-05 · repriced 2026-10-02

Used, Grade B

£450

CeX, read 2026-10-05 · repriced 2026-06-03

Used, Grade C

£440

CeX, read 2026-10-05 · repriced 2026-10-02

Trade in yours, Grade A

£296cash£358voucher

CeX, read 2026-10-05 · 21% more as store credit

Prices move; these were read on 2026-10-05. Used and trade-in figures are CeX's own, for an unlocked handset at this device's base storage. We hold no stock and take no commission.

Software support

Feature updates until
Not published by the maker
Security updates until
Not published by the maker

Basis: our inference from history

Apple's watchOS 27 page (read 2026-09-22) lists the Apple Watch Ultra 3 among the models watchOS 27 supports; watchOS 27 was released on 14 September 2026. Apple publishes no forward date for watchOS or security support.

Apple UK — watchOS 27 compatible models, retrieved 2026-09-22

Comparisons

The pairs a buyer of this watch would weigh, row by row with a verdict on each. Any other watch in the catalogue is a chooser away.

Against its own line

Against other Apple watches