Garmin Descent G2 46 mm Dive Computer Smartwatch

1 / 7

Product guide

Garmin Descent G2 46 mm Dive Computer Smartwatch

The Garmin Descent G2 is a dive computer smartwatch with a 1.2-inch AMOLED display, multi-GNSS support and dive-readiness features. Its listed battery life is mode-specific: up to 27 hours in dive mode or up to 10 days in smartwatch mode, so the longer figure is not a single-use guarantee.

At a glance

Watch-style dive computer intended for recreational, advanced, technical and freediving use, as well as pool apnea.
Multi-GNSS is described as helping mark dive entry and exit points at the surface.
Dive readiness draws on sleep, stress, recent exercise and dives.
Pairs with the Garmin Dive smartphone app to review stored dive logs.
Everyday smartwatch functions include notifications with a compatible phone, Garmin Pay with a supported bank and Connect IQ personalisation.

Price

£484.49Save 15%

Reference price: ~~£569.99~~

Price checked: 14 Nov 2026

View offer Ahead of Black FridayExplore the selection

Often bought together

Yenwen Screen Protector for Garmin Descent G2, 4 Pieces 9H Hardness Tempered Glass Film, Anti-Scratch Tempered Glass

£6.99

HOMTERN Case for Garmin Descent G2 and Descent G1,Soft TPU Lightweight Shell Drop-proof Scratch-Proof Flexible Screen Armor Protective Case,Black

£5.98

Pros and cons

Pros

Dive-mode and smartwatch-mode battery estimates are stated separately, helping buyers compare against their likely use.
Buttons and touchscreen provide two listed ways to operate the watch.
The listing describes activity tracking, dive logging and smartwatch functions in one device.

Technical specifications

25 specifications

Identity
Brand	Garmin
Model	Descent G2

Display
Screen size	1.2 Inches
Screen technology listed	AMOLED

Connectivity and controls
Wireless connection listed	Bluetooth
Controls	Buttons, Touchscreen

Power and battery
Battery life listed	27 Hours
Battery type	Lithium Ion

Dimensions and fit
Form factor	Round
Dimensions listed	45 x 45 x 15 millimetres
Weight listed	2.3 Ounces
Band material	Silicone
Band colour	Pink
Band width	22 Millimetres

Materials and protection
Water resistance listed	Water Resistant
Case material	Plastic
Dive rating claimed	10 ATM dive rating

Computing specifications
Storage listed	4 GB
Operating system	Garmin OS

Dive and activity features
GPS	Built-in GPS
Supported dive types	Support for all types of diving, including recreational, advanced, technical, freediving and pool apnea
Navigation feature	Multi-GNSS support allows divers to mark surface entry and exit points so you can see exactly where you started and ended the dive
Health and activity monitoring	24/7 wrist-based heart rate, Pulse Ox, Body Battery energy monitoring, sleep score and more give you insights into your health and wellness, telling you when to slow down and take breaks (this is not a medical device, and data presented is intended to be a close estimation of metrics tracked; Pulse Ox not available in all countries)
Dive logs	Store dive logs on device, and review in the Garmin Dive smartphone app
Battery life by mode	Battery life: up to 27 hours in dive mode and up to 10 days in smartwatch mode

What to know before buying

Listing details to confirm

The listing gives up to 27 hours in dive mode and up to 10 days in smartwatch mode. Its separate generic battery-life entry says 27 Hours, so treat runtime as mode-dependent rather than a single unconditional figure. The title says 46mm, while one dimensions entry gives 45 x 45 x 15 millimetres and another gives 15D x 46W x 46H millimetres. Water protection is described both as a 10 ATM dive rating and simply as Water Resistant, with IPX7 also listed. Confirm the exact case dimensions and water-rating details for the selected listing. Health metrics are estimates and the watch is not a medical device. Pulse Ox availability varies by country.

What’s in the box

Included

Descent G2
Extra-long adjustment strap
Charging/data cable
Documentation

Who is it for?

A good fit for

Divers wanting a watch-style computer that lists recreational, technical, freediving and pool-apnea support.
Buyers who want dive logging and surface entry and exit location marking alongside everyday smartwatch functions.
People looking for a round smartwatch with a 1.2-inch display and activity and health tracking.

Less suited to

Anyone who needs a larger display, as the listed screen is 1.2 inches and customer feedback is mixed on screen size.
Buyers who require a single guaranteed battery-runtime figure across all activities.
Anyone seeking a medical device or guaranteed clinical accuracy from its health metrics.

Garmin Descent G2 46 mm Dive Computer Smartwatch · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.6 / 5 · 131 ratings

5 stars82%82%
4 stars7%7%
3 stars3%3%
2 stars4%4%
1 star4%4%

Customer feedback highlights the dive-computer functions, feature range, battery life, screen readability underwater and data quality. The listing claims up to 10 days in smartwatch mode and supports several dive types, which gives context to those reported strengths but does not verify them. Opinions on compact size are mixed: some customers appreciate the fit on small wrists, while others find the screen too small. That trade-off matters for buyers who prioritise easy at-a-glance reading.

Positive themes

Customers report satisfaction with dive-computer functionality, feature options and versatility across recreational and advanced diving.
Customers praise battery life, screen quality underwater and data quality.

Mixed feedback

Feedback on the compact size is divided, with some finding it suited to small wrists and others considering the screen too small.

Frequently asked questions

How long does the battery last?

The listing claims up to 27 hours in dive mode and up to 10 days in smartwatch mode. These are different operating modes, not one interchangeable maximum.

Which types of diving does the listing say it supports?

It lists recreational, advanced and technical diving, freediving and pool apnea.

Can it record dive locations?

The listing says multi-GNSS can mark surface entry and exit points. It also says dive logs can be stored on the watch and reviewed in the Garmin Dive smartphone app.

Does the watch measure health metrics?

The listing describes wrist-based heart rate, Pulse Ox, Body Battery and sleep tracking. It says these data are estimates, the watch is not a medical device, and Pulse Ox is not available in every country.