Devil’s Grotto North - Grand Cayman

Igloo is a weird, wonderful little spot off Diani, and we absolutely love it for that. Forget your natural reefs for a minute; this site is all about an abandoned underwater habitat, a concrete dome that looks like it dropped out of a sci-fi movie. We've heard it called an igloo, or even the Death Star, and it really does have that stark, almost alien feel. What makes it special, though, is how nature has completely reclaimed it. The structure itself is a magnet for life, with nooks and crannies absolutely crammed with fusiliers and schooling snapper. At a maximum depth of 18 meters, it’s a chilled-out dive, perfect for a relaxed afternoon. The average visibility hovers around 12 meters, which is plenty to appreciate the details. We often find ourselves circling the main dome, peering into crevices for moray eels – the undulated morays are quite common here. Lionfish are usually perched on top, posing for photos, and if you’re lucky, you might even spot a marbled spinefoot grazing on the algae that now coats the concrete. It’s a site that suits anyone looking for something a bit different, a dive with a story, and a chance to see how quickly the ocean embraces man-made structures.

Location: Grand Cayman, Cayman Islands, Caribbean
Coordinates: 19.292800, -81.387500
Type: reef

Marine Protected Area: Old Pageant Beach - Sand Cay Apartments (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 Devil’s Grotto North

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 Devil’s Grotto North

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