Agincourt Reefs

Best months: Jan–Apr, Aug, Dec

Why dive here

With 154+ marine species recorded in the area - including hammerhead sharks, sea turtles, tiger sharks and napoleon wrasse - Agincourt Reefs offers some of Great Barrier Reef's richest reef diving. Water ranges 25-30°C, warmest January, February, March.

Marine lifeHammerhead Sharks, Sea Turtles, Tiger Sharks and Napoleon Wrasse · 154+ species recorded

Water25-30°C · warmest January, February, March

CharacterReef dive · max 5-20m

StandoutExceptional marine biodiversity

Cathedral is one of those St. Vincent sites we always look forward to, a bit of a sensory treat. You drop onto a reef that just keeps sloping, down to around 22 metres, where it flattens out to sand. The light here is what really gets us. It streams through the overhangs and cuts in the reef, creating these moving shafts you can swim through, almost like a real cathedral’s stained glass, just underwater. We usually find nimble spray crabs tucked in around the sea urchins, and if you’re patient, you’ll spot juvenile trunkfish hiding out there too. Our favourite time to dive Cathedral is mid-morning, when the sun is high enough to really play with those light effects. The currents can shift, so be ready to go with the flow, but it’s never anything too wild. You’ll drift past schools of southern sennet and chromis, often with jacks circling. Keep an eye on the sandy patches at the bottom for saddled blennies or a stargazer peeking out. This site is great for photographers chasing those dramatic light rays, and anyone who appreciates a dive with a real sense of atmosphere.