Big Buoy at Agincourt Reef is a boat-only site featuring a reef wall and pinnacles that descend from 5 to 40 metres. The site is known for its moderate currents, which facilitate drift dives along the structure. Divers should maintain solid buoyancy control to manage the flow, as conditions can become challenging on certain tidal cycles. Visibility typically ranges from 10 to 35 metres. Due to the presence of boat traffic, surface awareness is essential. The site is suitable for intermediate divers, with the wall and pinnacles offering varied profiles. Titan Triggerfish may be aggressive during their breeding season, and divers should remain cautious of sharp coral and deep sections.

East Hope Island at St Crispin Reef offers a combination of wall and drift diving suitable for beginners. The site features a shallow reef starting at 5 metres that extends to a drop-off reaching 25 metres. Visibility varies between 10 and 35 metres, with moderate currents present. Access is strictly by boat, and guided tours are recommended due to potential current changes near the point. Species recorded around this area include Napoleon Wrasse, Ornate Ghostpipefish, Regal Angelfish, Titan Triggerfish, Broadclub Cuttlefish, Giant Moray, Giant Clam, Whitetip Reef Shark, Day Octopus, Harlequin Sweetlips, Indian Lionfish, various wrasses, Sixbanded Angelfish, and Sling-jaw Wrasse. Stinger season occurs from November to May, and protective suits are recommended.

Harrys Bommie is a reef site located at Agincourt Reef, featuring a consistent depth of 16 metres. The topography consists of a reef structure that is suitable for beginners comfortable with this depth. Access is exclusively by boat, with a typical dive duration of 45 minutes. Visibility varies between 10 and 30 metres. While currents are generally mild, a narrow gap in the reef is known to be current-prone. Divers should be aware of potential thermoclines and the presence of marine stingers between November and May, during which time wearing a full-body stinger suit is recommended. The site is serviced by boat charters and guided tours.

Nursery Bommie is a reef pinnacle located within Agincourt Reef, reaching depths of 25 to 30 metres. This site is accessible only by boat and is best suited for intermediate divers due to the depth. Conditions typically feature mild currents and visibility ranging from 10 to 40 metres. Divers should be aware of potential jellyfish presence between November and April. The site requires careful navigation to avoid contact with the reef structure. Given the depth and environmental factors, this location is not recommended for snorkelling.

Turtle Bay is a reef and wall site located on the outer edge of the continental shelf at Agincourt Reef. Divers can explore depths ranging from 5 to 22 metres, with an average depth of 16 metres. The site is accessed by boat and is suitable for intermediate divers due to moderate currents that allow for drift diving. Visibility typically ranges between 10 and 30 metres. The reef structure features giant clams and sea fans. Divers should be aware of jellyfish, particularly between November and May, and protective suits are recommended during this period. Sharks are also present at this location.

Crack a Jack is a reef and pinnacle site located at Agincourt Reef, offering depths between 5 and 36 metres with an average of 18 metres. The site features a reef wall that allows for varied profiles, from shallow snorkelling depths to deeper sections suitable for intermediate divers. Visibility typically ranges from 15 to 30 metres. Access is by boat only, and divers should be prepared for mild currents. The site is suitable for night diving. Divers should be aware of sharp coral and the presence of marine stingers between November and May, when full-body protective suits are recommended. Always deploy a surface marker buoy before ascending due to boat traffic.

Agincourt Reef is located at the outer edge of the Great Barrier Reef, featuring a series of ribbon reefs characterised by walls, pinnacles, and shallow reef tops starting at 2 metres. Divers and snorkellers can explore depths ranging from 2 to 30 metres, with an average depth of 18 metres. Access is exclusively by boat, and the site is suitable for beginners. Conditions include moderate currents and visibility typically between 15 and 30 metres. Thermoclines may occur, and water temperatures range from 25 to 29 degrees Celsius. Facilities available include showers, changing rooms, and a rinse station. Night diving is permitted at this location.

Castle Rock is a ribbon reef site located on the outer edge of Agincourt Reef. The topography features a reef structure that descends from the shallows to a depth of 25 metres, incorporating pinnacles, walls, and drop-offs. Access is exclusively by boat, with visibility typically ranging between 15 and 30 metres. While the site is suitable for beginners in shallower sections, divers must remain aware of potential strong currents and vertical currents near wall sections. Water temperatures fluctuate between 25C and 29C throughout the year. Protective suits are recommended during stinger season, which runs from November to May.