Eight dive computers and dive watches sorted by budget, all listed with an offer on Amazon.co.uk when we checked on 3 November 2026. Note today's price: it is the only way to know on Black Friday whether a deal is genuine.
Checked on Amazon.co.uk from a UK location on 3 November 2026. Prices change often, especially around Black Friday: the button shows today's offer.
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Price bands seen on Amazon.co.uk on 3 November 2026.
| Model | Type | Budget |
|---|---|---|
| Cressi Leonardo | Entry level, one button | Under £300 |
| Mares Puck 4 | Entry level with Bluetooth | Under £300 |
| Aqualung i330R | Colour screen, rechargeable | Under £300 |
| Mares Quad 2 | Multi-gas, Bühlmann | Under £300 |
| Cressi Raffaello | Big high-contrast screen | Under £300 |
| Garmin Descent G2 | Smartwatch and dive computer | £300–£600 |
| Shearwater Peregrine TX | Big colour screen, air integration | Over £600 |
| Suunto Ocean | Sports watch, Tank POD | Over £600 |
Exact prices change often. Specs from manufacturers and Amazon listings.
One button, air, nitrox (21 to 50% O₂) and gauge modes, big digits and a battery you can change yourself. Ideal for Open Water and Advanced divers on a single gas.
✅ Pros
❌ Cons
A dive-centre classic, updated: one button, the Bühlmann algorithm with gradient factors, up to 3 nitrox gases, Bluetooth and the Mares app. Wear it on the wrist or in a console.
✅ Pros
❌ Cons
A very bright colour screen, a rechargeable battery, Bluetooth and up to 3 nitrox mixes. The most modern model in this price band.
✅ Pros
❌ Cons
Four buttons, a very readable display, Bluetooth and Bühlmann with gradient factors. It handles several gases up to trimix: the most room to grow for the price.
✅ Pros
❌ Cons
Cressi's step up from the Leonardo: a large, high-contrast backlit display, air and nitrox up to three mixes, plus gauge and freediving modes. User-replaceable battery; the listing mentions a built-in digital compass.
✅ Pros
❌ Cons
AMOLED display, up to 27 hours of diving and 10 days in smartwatch mode, up to 12 gases, rebreather mode, three freediving modes and a built-in torch. No air integration.
✅ Pros
❌ Cons
A large 2.2-inch colour screen, around 30 hours of battery life, an adjustable Bühlmann algorithm, 3 nitrox gases and optional air integration (up to 4 transmitters). The most comfortable to read underwater in this list.
✅ Pros
❌ Cons
Sports watch and dive computer (60 m), AMOLED screen and sapphire glass, 40 to 60 hours of diving, dual-band GPS. Shows remaining gas with Suunto's Tank POD, sold separately.
✅ Pros
❌ Cons
A crossed-out price says little: it is often an old RRP that nobody charges any more. Note today's price for the two or three models you like, then compare during Black Friday week.
Under the Buy button, Amazon shows who sells and who dispatches. During sales, third-party sellers sometimes offer a lower price with long delivery times or different return terms. For a dive computer, the warranty matters more than a few pounds.
The pressure transmitter (Suunto Ocean, Peregrine TX) is sold separately, as are a spare cable or screen protector. Compare the total cost, not just the computer's price.
For recreational diving on air or nitrox, a Leonardo or Puck 4 is enough. Trimix, rebreather and many gases are for technical diving only. Our budget dive computer guide compares the entry-level models in more detail.
Black Friday is Friday 27 November 2026 and Cyber Monday is Monday 30 November. Amazon usually starts its deals several days earlier. Not every model gets a discount, and some deals only last a few hours.
Sometimes, but not all of them and not always by much. Dive brands discount less than consumer electronics; Garmin and Suunto watches are the most likely to be on offer. The only way to know is to compare with the price you noted a few weeks earlier.
The Cressi Leonardo is the simplest: one button, air and nitrox, big digits. The Mares Puck 4 adds Bluetooth and Bühlmann. If you plan to progress, the Mares Quad 2 handles several gases, so you won't need to replace it in two years.
If you're diving before the end of November, buy now: a few pounds saved isn't worth a dive with a hire computer you don't know. Otherwise, note today's price and compare on the day.
Amazon usually extends its returns window for Christmas purchases. Third-party sellers can have their own terms: check the returns policy on the listing before you order.