Big Peninsula, also known as Secret Beach, is a boat-accessible reef and wall dive on Hook Island. The site features a wall that drops from the shallows to a maximum depth of 30 metres, with an average depth of 15 metres. Divers encounter moderate to strong currents, particularly around the island points, making this site suitable for intermediate divers. Slack tide is recommended for optimal conditions. Visibility ranges from 4 to 15 metres. Species recorded around this area include Napoleon Wrasse, Green Sea Turtle, Giant Trevally, and various wrasses. Stinger season occurs from November to May, during which a full-body lycra suit is highly recommended to mitigate jellyfish hazards.

Mackerel Bay on Hook Island is a reef site suitable for beginner divers, offering depths between 1 and 18 metres with an average of 12 metres. Access is by boat only. The site features mild currents, though visibility varies significantly from 2 to 30 metres. Following damage from Cyclone Debbie in 2017, the reef is currently in a state of recovery. Divers should note that the site is exposed to southerly winds and can experience surf. Species recorded around this area include Napoleon Wrasse, Green Sea Turtles, Giant Trevally, Barramundi Cod, and various species of wrasse, angelfish, and butterflyfish. Always check locally for stinger activity before entering the water.

Luncheon Bay, located on Hook Island, provides a reef and wall environment suitable for beginners. The site features depths ranging from 3 to 20 metres, with an average depth of 9 metres. Navigation is straightforward due to mild currents, which typically remain below 1 knot. Access is exclusively by boat charter. Visibility varies significantly from 3 to 30 metres depending on conditions. During stinger season, which runs from October to May, the use of a full-body stinger suit is recommended to mitigate the risk of dangerous jellyfish. Water temperatures fluctuate between 22C in winter and 29C in summer.

Wrasse Bay is a reef site located on the northern side of Hook Island, offering depths between 3 and 18 metres with an average of 10 metres. This site is suitable for beginner divers, though it requires boat access and careful planning around slack tide due to moderate currents. Visibility typically ranges from 3 to 15 metres. Water temperatures remain warm throughout the year, ranging from 22C to 29C. Divers should be aware of stinger season from October to May, during which full-body protective suits are recommended. Guided tours are available to assist with navigating the local conditions and currents.

Mantaray Bay on Hook Island is a reef site accessible only by boat. Suitable for beginners, the site features depths ranging from 7 to 25 metres with an average of 12 metres. Divers and snorkellers encounter mild currents and visibility between 7 and 16 metres. Marine life includes very common Napoleon Wrasse and various wrasses, alongside common Giant Trevally, Elongate Clam, Common Coral Trout, and Copperband Butterflyfish. Less frequently, visitors may spot Bluefaced Angelfish, Blue-barred Parrotfish, Rock Cod, and Bluespine Unicornfish. Hazards include jellyfish and sharks. Due to active boat traffic, divers should stay near the shot line and deploy a surface marker buoy.

Butterfly Bay on Hook Island is a reef site suitable for beginners, offering depths between 5 and 15 metres with an average of 10 metres. Access is by boat only, and divers should be aware of mild currents and potential jellyfish and sharks. Visibility ranges from 2 to 10 metres, with morning dives often providing the best conditions. Marine life recorded here includes wrasses, sixbanded angelfish, Rainford's butterflyfish, maroon clownfish, copperband butterflyfish, coral trout, foxface rabbitfish, Pacific bullethead parrotfish, and rock cod. Napoleon wrasse, barramundi cod, and Chromodoris nudibranch are occasionally sighted, while reef manta rays are rare.

Saba Bay at Hook Island is a reef site suitable for beginners, offering depths between 5 and 17 metres with an average of 11 metres. Access is by boat only, as the site is located 18 kilometres from the shore. Divers and snorkellers can expect mild currents and visibility ranging from 20 to 30 metres. The site is exposed to south-easterly winds, and parts of the reef are currently recovering from the impact of Cyclone Debbie in 2017. Hazards include sharp coral, and stinger season for Irukandji and box jellyfish occurs from October to May. Water temperatures remain warm throughout the year, ranging from 22 to 29 degrees Celsius.

Cockatoo Point is a boat-access reef site located off Hook Island, Australia. Suitable for beginners, the site features a diverse structure of hard and soft corals, including staghorn, plate, boulder, brain, mosaic, and lunar varieties, alongside mushroom and elephant ear corals. Divers and snorkellers can explore depths ranging from 1 to 20 metres, with an average depth of 10 metres. Visibility typically fluctuates between 5 and 15 metres. Due to moderate currents and the presence of jellyfish, a full wetsuit or lycra suit is recommended for protection. Boat entry is required, and divers should monitor current strength throughout the 45-minute typical dive duration.