In this blog:
If you've had a Garmin Descent on your wishlist, now's the time. We've just dropped the prices across the entire Descent Mk3 line-up and the Descent G2 - every single model below is cheaper than it's ever been with us. Whether you're after the ultimate do-it-all technical dive computer or a smaller, lighter option for everyday wear, there's a serious deal here with your name on it.
Garmin's Descent range is popular for a reason, it's one of the only dive computer lines that genuinely earns its keep on your wrist every single day, not just on dive trips. Every model here plugs straight into Garmin Connect - the same app ecosystem that powers Garmin's running, cycling, golf, and general fitness watches - so your dive logs sit alongside your training data, sleep tracking, recovery metrics, and everything else Garmin does best. For divers who are also runners, cyclists, gym-goers, or just want one watch for absolutely everything, that ecosystem is a huge part of the appeal.
Here's the full breakdown, model by model.
Garmin Descent Mk3i – 43mm
The 43mm Mk3i is our Staff's Top Pick for good reason - it's the more compact, wrist-friendly size in the Mk3i range without giving up any of the serious technical capability. It's purpose-built for divers, combining a bright 1.2" AMOLED display with a scratch-resistant sapphire lens, a 200-metre dive-rated case, and metal leakproof inductive buttons. Underwater it covers everything from recreational to technical scuba and freediving, and when paired with Garmin's Descent T2 transceiver (sold separately), it adds full wireless air integration — tank pressure, remaining air time, and SubWave sonar diver-to-diver messaging for up to eight networked divers.
Above water, it's every bit the multisport smartwatch: GPS, DiveView colour maps with over 4,000 preloaded dive sites, a dive readiness tool that factors in your sleep, stress, and exercise, plus preloaded activities for trail running, swimming, biking, skiing, and more.
Who it's for: Divers who want one premium watch that handles everything from a reef dive to a technical wreck, and who'll also wear it running, cycling, or at the gym — all while fitting comfortably on a smaller wrist. The choice between finishes comes down to how you want it to look and feel day to day.
Garmin Descent Mk3i – 51mm
The 51mm Mk3i is the largest and most fully-loaded model in the range, built for the committed diver. It steps up to a stunning 1.4" AMOLED display, still protected by sapphire crystal and still dive-rated to 200 metres with the same leakproof inductive buttons, but with a longer battery life of up to 66 hours in dive mode. It's also the only size in the range with a built-in LED flashlight - with variable intensity and strobe modes - so you stay visible in low-light conditions above or below the water, alongside a lume mode with green luminescence for extra low-light clarity.
Like the 43mm, it supports full wireless air integration and SubWave sonar diver-to-diver communication when paired with the Descent T2 transceiver, plus DiveView maps, dive readiness scoring, and Garmin's full suite of multisport features - trail running, swimming, biking, surfing, skiing, and more, with VO2 max, wrist-based heart rate, and Pulse Ox for tracking your fitness above the water too.
Who it's for: Technical divers, wreck divers, and night divers who'll genuinely use the built-in torch and the extra screen real estate, and who want the longest battery life and largest, most legible display in the range. If you dive often and push your limits, this is the one to go all-in on.
Garmin Descent G2
The G2 is Garmin's compact, more affordable Descent - often described as a mini Mk3i - and with our new pricing, it's an excellent way into the Garmin dive ecosystem without the flagship price tag. It packs a 1.2" AMOLED touchscreen with sapphire lens, a 100m dive rating, and support for recreational scuba, technical scuba, freediving, and pool apnea modes, with up to 40 customisable dive alerts. Battery life is excellent too - up to 27 hours in dive mode and up to 10 days in smartwatch mode.
It doesn't have wireless air integration, but it does everything else you'd expect from a modern Garmin dive watch: GPS for marking entry and exit points, dive readiness scoring, 24/7 heart rate and Body Battery monitoring, and 100+ built-in sports apps for life outside the water. It's also built with recycled ocean-bound plastics in the housing, bezel, and buttons - a nice touch for anyone who cares about the health of the water they're diving in.
It's available in the standard colourway or in Pink (Paloma), with a softer finish and a shell pink band - same spec, same battery life, just a different look on the wrist.
Who it's for: Divers who want Garmin's dive computer smarts and full smartwatch ecosystem without stretching to Mk3i pricing, and anyone who wants a smaller, lighter everyday watch that just happens to be a serious dive computer too.
Why Now Is the Time to Buy
With every model across the Mk3i 43mm, Mk3i 51mm, and G2 range now at its lowest price yet, this is one of the strongest windows we've had to pick up a Garmin Descent. The Connect app ties everything together - your dive logs sit next to your 10k times, your gym sessions, your sleep data, and your recovery scores, and Garmin's broader ecosystem of sensors and accessories all plugs straight in if you want to go further with your training. Stock on deal pricing doesn't tend to hang around, so if you've been waiting for the right moment - this is it.
Pop into Mike's Dive Store or get in touch and we'll help you match the right model to your diving, your budget, and your lifestyle.
The Garmin Descent Mk3i range (43mm and 51mm) and the Descent G2 are now at their lowest prices yet with Mike's Dive Store.
The 43mm Mk3i is the more compact, wrist-friendly option; the 51mm adds a bigger 1.4" display, longer battery life, and a built-in flashlight for serious technical and night diving.
The G2 offers the same Garmin Connect ecosystem and dive-ready features in a lighter, more affordable package, in standard or Pink (Paloma) finishes.
What is the difference between the Garmin Descent Mk3i 43mm and 51mm?
The core dive and smartwatch features are the same across both sizes, but the 51mm has a larger 1.4" AMOLED display versus the 1.2" display on the 43mm, longer battery life of up to 66 hours in dive mode, and a built-in LED flashlight with strobe modes that the 43mm doesn't have. The 43mm is better suited to smaller wrists and everyday wear, while the 51mm suits divers who want the biggest screen, longest battery life, and extra visibility tools for technical or night diving.
Does the Garmin Descent Mk3i need a separate transmitter for air integration?
Yes - wireless air integration on the Mk3i (tank pressure, remaining air time, and SubWave sonar diver-to-diver messaging) requires Garmin's Descent T2 transceiver, which is sold separately. Without it, the Mk3i still works as a full-featured dive computer and multisport smartwatch, but tank pressure won't display on the watch itself.
Is the Garmin Descent G2 as good as the Mk3i for diving?
The G2 covers the same core diving essentials - recreational scuba, technical scuba, freediving, and pool apnea modes, an AMOLED display, and full Garmin Connect integration - making it an excellent, more affordable dive computer for most divers. The Mk3i pulls ahead with a larger, brighter display, higher depth rating, wireless air integration, and (on the 51mm) a built-in flashlight, so serious technical divers will get more from the Mk3i, while recreational and multisport divers will find the G2 covers everything they need.
