Agincourt Reef sits on the outer ribbon reef edge, where walls and pinnacles define the diving character. Sites range from shallow reef tops accessible to beginners through to deeper drift walls that suit intermediate divers. Napoleon Wrasse, Whitetip Reef Shark, and Ornate Ghostpipefish are consistently observed across sites, alongside a remarkably broad mix of reef fish and cephalopods. All diving is boat-accessed.
Monthly water temperature across Agincourt Reef's sites, from satellite sea-surface data corrected for depth. The band shows the site-to-site spread.
Water stays warm through the warmer months from November to April, then cools slightly through the middle of the year without becoming cold. The best-months data points clearly to May through October as the prime window, when conditions are at their most settled and visibility tends to be at its peak. Sites on the outer reef edge can carry moderate currents, particularly at passage sites like Barracuda Pass and Anybody's.
6 operators
8 more sites to explore
Water temperature around Agincourt Reef ranges from about 25°C in June to 29°C in February, based on satellite sea-temperature data for its dive sites.
In the warm season (about 29°C) a rash guard or 3mm shorty is comfortable in Agincourt Reef; in the coldest months (about 25°C) step up to a 3mm full suit.
Fin maps 15 sites in Agincourt Reef (15 scuba diving sites and 4 snorkelling spots, with some suited to both).
Across Agincourt Reef's dive sites, May, June, July, August, September and October are most often reported as the best months to visit.
Sightings at Agincourt Reef are consistently diverse. Napoleon Wrasse, Whitetip Reef Shark, and Grey Reef Shark are regularly observed, along with Ornate Ghostpipefish, Broadclub Cuttlefish, Titan Triggerfish, and Regal Angelfish. Reef fish such as Harlequin Sweetlips, Sixbanded Angelfish, and Pacific Bullethead Parrotfish are present across virtually every site.
Several sites are rated beginner level, including Castle Rock, Agincourt Ribbon Reefs, The Point, and Phil's Bommie, all of which offer shallow reef tops before the terrain drops away. Intermediate sites such as Anybody's and Barracuda Pass involve moderate currents and are better suited to divers with some experience. The mix means beginners and intermediate divers can often travel together on the same day trip.
All sites at Agincourt Reef are boat dives. Operators including Silversonic, Quicksilver Cruises, Poseidon Reef Tours, and Cairns Dive Centre run day trips out to the reef. There is no shore access given the outer reef location.
The reef features a varied mix of walls, pinnacles, and open reef terrain, much of it drift-capable where currents are present. Barracuda Bommie and Phil's Bommie are classic pinnacle dives, while sites like Anybody's and Agincourt Ribbon Reefs offer wall diving that drops from very shallow reef tops to significant depth. The outer ribbon reef position means conditions and topography differ noticeably from inshore reef diving.
