Alpha Plongée - Diamond Rock

Diamond Rock, or Rocher du Diamant as the locals call it, is an iconic landmark in Martinique, and Alpha Plongée gives you a cracking perspective of its underwater foundations. We’ve always found this site to be a proper kaleidoscope of blues, from the deep indigo of the drop-off to the lighter azure shallower parts. What we really love about Alpha Plongée is the way the light plays through the cracks and crevices of the rock itself, illuminating schools of blue-striped grunts and the occasional shy hogfish. Keep an eye out for seahorses here; we’ve had some cracking encounters tucked away amongst the gorgonians. The resident mutton snapper are pretty bold, often checking you out with an inquisitive eye. It’s a site that feels a bit wild, a true Caribbean classic, with that surge reminding you you’re diving an exposed rock face. We’d suggest hitting it on a calmer day to really appreciate the details, especially if you want to spend time hunting for those seahorses. The deeper sections often give you glimpses of larger pelagics moving past. It’s a dive that rewards slow exploration, perfect for photographers or anyone who appreciates the subtle beauty of a robust reef ecosystem.

Location: Diamond Rock, Martinique, Caribbean
Coordinates: 14.502321, -61.084034

Marine Protected Area: Cap Salomon

Best Time to Dive in Diamond Rock

The warmest water temperatures in Diamond Rock occur in January, averaging 27.5°C. The coolest conditions are in December at 27.5°C.

Monthly Water Temperatures

January: 27.5°C (air: 25.8°C)
February: 27.5°C (air: 25.8°C)
March: 27.5°C (air: 26.2°C)
April: 27.5°C (air: 27.0°C)
May: 27.5°C (air: 27.9°C)
June: 27.5°C (air: 27.9°C)
July: 27.5°C (air: 27.6°C)
August: 27.5°C (air: 27.9°C)
September: 27.5°C (air: 28.1°C)
October: 27.5°C (air: 27.8°C)
November: 27.5°C (air: 27.0°C)
December: 27.5°C (air: 26.3°C)

Nearest Dive Centres to Alpha Plongée

CANOPEE BLEUE
Deep Turtle
Espace Plongee Martinique - ["PADI"]
NATIYABEL - SSI, PADI, CMAS, FFESSM, ANMP
O FIL DE L’EAU - FFESSM, CMAS
PLONGEE IMMERSION CARAIBES

Marine Life in Diamond Rock

Home to 369 recorded species including 327 reef fish, 15 whales & dolphins, 8 sharks & rays, 3 seagrass & algae, 3 sea snails & nudibranchs, 3 other.

Notable Species

Barber (Acanthurus bahianus) - Reef Fish
Greater Soapfish (Rypticus saponaceus) - Reef Fish
Sperm Whale (Physeter macrocephalus) - Whales & Dolphins
Lawyer (Halichoeres radiatus) - Reef Fish
Pacific Spotted Scorpionfish (Scorpaena plumieri) - Reef Fish
Flamefish (Apogon maculatus) - Reef Fish
Bastard soldierfish (Myripristis jacobus) - Reef Fish
Clown Wrasse (Halichoeres maculipinna) - Reef Fish
Devilfish (Ophioblennius atlanticus) - Reef Fish
Cook (Holocentrus adscensionis) - Reef Fish
Jack (Epinephelus adscensionis) - Reef Fish
Hamlet (Gymnothorax moringa) - Reef Fish
Coney (Cephalopholis fulva) - Reef Fish
Porcupine (Diodon holocanthus) - Reef Fish
Blackfish (Globicephala macrorhynchus) - Whales & Dolphins
Spotted Soapfish (Rypticus subbifrenatus) - Reef Fish
Yellowtail Parrotfish (Sparisoma rubripinne) - Reef Fish
Cluck (Pareques acuminatus) - Reef Fish
Spotted Goatfish (Pseudupeneus maculatus) - Reef Fish
French grunt (Haemulon flavolineatum) - Reef Fish

Recommended Packing List for Alpha Plongée

Based on average water temperature of 27.5°C.

Shorty or Rashguard - warm 27°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