Samsung Galaxy Watch8

Also sold as Galaxy Watch 8

Works with: Android only
Display: AMOLED, 1.5 in
Case sizes: 40 / 44 mm
Battery: 40 hours
Water resistance: 5 ATM
Weight: 34 g
Cellular: LTE version

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Samsung Galaxy Watch8 at a glance

Battery

Charge most nights

Up to 40 hours in smartwatch mode.
GPS

Multi-band GPS

No maps. Runs and rides without your phone.
Display

AMOLED, 1.5 in

1.5 in, up to 3,000 nits, always-on option and touchscreen.
Health

ECG on the wrist

Measures ECG, blood pressure, blood oxygen and skin temperature.
Phone & smart

Android only

LTE, payments, music and calls.
Build

5 ATM water rating

34 g. 2 case sizes. Sapphire lens. MIL-STD-810.

Samsung Galaxy Watch8 full specifications

Overview

A smartwatch from Samsung, released in 2025.

Brand	Samsung
Model	Galaxy Watch8
Series	Galaxy Watch
Released	2025-07
Versions	40 mm, 44 mm
Colours	Graphite, Silver
Also sold as	Galaxy Watch 8, Watch8

Platform & apps

Needs an Android phone, running Wear OS.

Operating system	Wear OS
Works with	Android only
Minimum Android	Android 12
Chipset	Exynos W1000
RAM	2,000 MB
Storage	32 GB

Display

A vivid, high-contrast screen that is easy to read indoors and out.

1.5 in, up to 3,000 nits, always-on option and touchscreen.

Display type	AMOLED
Display name	Super AMOLED
Screen size	1.5 in
Resolution	480 x 480
Pixel density	327 ppi
Peak brightness	3,000 nits
Colour display	Yes
Always-on display	Yes
Touchscreen	Yes

Design & durability

Comes in 2 case sizes (40, 44 mm) weighing 34 g.

Rated 5 ATM: fine for swimming laps and showers. A sapphire lens resists scratches. Tested to MIL-STD-810 for shock, heat and cold.

Case sizes	40 / 44 mm
Case shape	Round
Dimensions	46 x 43.7 x 8.6 mm
Thickness	8.6 mm
Weight (case)	34 g
Case material	Armor Aluminium
Lens	Sapphire crystal
Back material	Sapphire glass
Water resistance	5 ATM
IP rating	IP68
MIL-STD-810 tested	Yes

Battery

Charge most nights: up to 40 hours in smartwatch mode.

With the always-on display, about 30 hours. Real battery life depends on screen brightness, notifications and workouts.

Battery (smartwatch mode)	40 hours
All battery modes	Smartwatch: 40 hours; Always-on display: 30 hours
Battery capacity	435 mAh
Battery type	Built-in battery
Charging	wireless
Wireless charging	Yes
Full charge time	78 min

GPS & navigation

Built-in multi-band GPS for accurate tracks, even near tall buildings and trees.

GPS	Built-in
Multi-band GPS	Yes
Satellite systems	GPS, GLONASS, Galileo, BeiDou

Health & sensors

A health-focused watch: it measures ECG, blood pressure, blood oxygen and skin temperature.

For sleep, it offers sleep coaching. It can warn you about an irregular heart rhythm. ECG availability can depend on your country.

Sensors	optical HR, ECG electrode, SpO2, skin temperature, accelerometer, gyroscope, barometer, compass, ambient light, EDA
Heart-rate tracking	24/7
ECG	Yes
Irregular rhythm alerts	Yes
Blood oxygen (SpO2)	Yes
Skin temperature	Yes
Blood pressure	cuff-calibrated
Sleep tracking	Sleep coaching
Sleep apnea alerts	Yes
Stress tracking	Yes
Energy score	Energy Score
Cycle tracking	Yes
Body composition	Yes

Safety

Detects hard falls and can call for help if you don't respond.

SOS works through your paired phone.

Emergency SOS	Via phone
Fall detection	Yes

Training

Tracks your workouts and daily activity.

It adds daily suggested workouts.

Auto activity detection	Yes
Training metrics	VO2 max, Personalised Functional Threshold Power
Adaptive coaching	Yes
Running dynamics	Yes

Smart features

Smart extras include an LTE version, contactless payments, music storage and calls on the wrist.

Voice assistant: Gemini. LTE needs a carrier plan.

Notifications	Yes
Message replies	Android
Calls on the watch	Yes
Speaker	Yes
Microphone	Yes
Voice assistant	Gemini
Contactless payments	Yes
Payment service	Google Pay
Cellular	LTE version available
Music storage	Yes
Wi-Fi	802.11a/b/g/n 2.4GHz+5GHz
Bluetooth	Bluetooth 5.3

Specs compiled from Samsung's product pages and datasheets, with some identifiers from Open Icecat. Manufacturers revise hardware between versions, so check the version on the box. Spotted an error? Tell us.