Jax Dax - Grand Cayman

Matapaua Bay, nestled within the wider Goat Island marine reserve, is a site we often head to when we’re looking for a relaxed dive that still delivers. It’s pretty shallow, topping out around 12 meters, making it ideal for newer divers or those just wanting to stretch their fins. You’ll find the main sandy bay framed by rocky reefs on either side, cloaked in that classic New Zealand kelp. We love Matapaua for its surprising interactions. Sure, you’ll see the usual spotties and demoiselles zipping about, but keep an eye out for the crested blennies peeking from crevices. We’ve had some fantastic encounters with snapper here, often quite curious, and the red rock lobsters are always a treat to spot tucked under ledges. Our favourite tip for Matapaua: head out on a calm day after a dry spell. Rain and southeast winds can really churn up the silt, dropping that 7-meter average visibility right down. During summer, watch for boat traffic in the main bay; it can get busy. We usually stick to the reef edges early in the morning to avoid the crowds and catch the marine life at its most active. You’re likely to see something unexpected, even if it’s just a lone greenbone cruising by.

Location: Grand Cayman, Cayman Islands, Caribbean
Coordinates: 19.340800, -81.390000
Type: reef

Marine Protected Area: Victoria House- Treasure Island Resort (Grand Cayman)

Best Time to Dive in Grand Cayman

The warmest water temperatures in Grand Cayman occur in September, averaging 30.4°C. The coolest conditions are in February at 26.9°C.

Monthly Water Temperatures

January: 27.3°C
February: 26.9°C
March: 27.0°C
April: 27.7°C
May: 28.7°C
June: 29.2°C
July: 29.8°C
August: 30.3°C
September: 30.4°C
October: 30.0°C
November: 29.0°C
December: 28.0°C

Nearby Dive Sites in Grand Cayman

Nearest Dive Centres to Jax Dax

Atlantis Dive Center
Divers Down - PADI
Divers Supply
Divetech - PADI
Diving Center - SSI, PADI, CMAS, NAUI, FEDAS, ACUC
Don Foster's Dive Cayman, Ltd. - ["PADI"]

Marine Life in Grand Cayman

Home to 332 recorded species including 276 reef fish, 30 hard corals, 5 other, 5 seagrass & algae, 4 whales & dolphins, 4 sharks & rays.

Notable Species

Elkhorn coral (Acropora palmata) - Hard Corals
Massive Starlet Coral (Siderastrea siderea) - Hard Corals
Mustard hill coral (Porites astreoides) - Hard Corals
Gutong (Scarus iseri) - Reef Fish
Dark Green Parrotfish (Sparisoma viride) - Reef Fish
Blue Doctor (Acanthurus coeruleus) - Reef Fish
Gutong (Sparisoma aurofrenatum) - Reef Fish
French grunt (Haemulon flavolineatum) - Reef Fish
Great star coral (Montastraea cavernosa) - Hard Corals
Barber (Acanthurus bahianus) - Reef Fish
Finger Coral (Porites porites) - Hard Corals
Butterfly (Chaetodon capistratus) - Reef Fish
Schoolmaster (Lutjanus apodus) - Reef Fish
Grunt (Haemulon plumierii) - Reef Fish
Lettuce Coral (Agaricia agaricites) - Hard Corals
Bluestriped Grunt (Haemulon sciurus) - Reef Fish
Sheephead (Microspathodon chrysurus) - Reef Fish
Sammy Johnson (Scarus taeniopterus) - Reef Fish
Cola (Ocyurus chrysurus) - Reef Fish
Graysby (Cephalopholis cruentata) - Reef Fish

Recommended Packing List for Jax Dax

Based on average water temperature of 28.7°C, currents 9 cm/s.

Shorty or Rashguard - warm 29°C water needs minimal exposure protection
Mask - essential for every dive
Fins
BCD - buoyancy compensator
Regulator - your most safety-critical piece of gear
Dive Computer - tracks depth, time, and NDL
Surface Marker Buoy (SMB) - essential for boat pickups
Dive Torch - useful for crevices and colour at depth
Underwater Camera - capture your diving memories