Ski Slope at Flynn Reef offers a varied profile, dropping from 5 metres to a maximum depth of 27 metres. This site features distinct reef zones and a wall structure, making it suitable for intermediate divers. Access is by boat only, with mild currents facilitating drift dives. Visibility typically ranges between 15 and 30 metres. Water temperatures remain warm throughout the year, though stinger suits are required from November to May due to seasonal jellyfish. The site supports a diverse range of reef fish and invertebrates across its multi-level topography. Guided tours and boat charters are available from Cairns and Port Douglas.

Flynn Reef is an outer Great Barrier Reef site featuring a diverse topography of shallow coral gardens, walls, and canyons. Depths range from 5 to 30 metres, with an average of 15 metres, making it suitable for both beginners and experienced divers. Access is by boat only, with mild currents that occasionally allow for drift dives. Visibility typically spans 15 to 30 metres. Water temperatures remain warm throughout the year, ranging from 25C to 29C. The site supports night diving and offers facilities including equipment rental and guided tours. Divers should be aware of potential hazards including sharp coral, triggerfish, lionfish, and sharks, as well as seasonal jellyfish.

Tennis Courts at Flynn Reef is a reef and wall site offering drift diving opportunities. Suitable for intermediate divers, the site features depths ranging from 12 to 25 metres, with an average depth of 20 metres. Visibility typically spans 15 to 20 metres. Divers should expect mild currents, which are best managed by drifting with the flow. Boat access is required for this site, which is located 20 kilometres from shore. Hazards include deep water, lionfish, sharks, and stonefish. Stinger season occurs from November to May, during which full-body stinger suits are recommended. Territorial triggerfish may be present during nesting season.

Little Tracey's is a boat-accessed reef site at Flynn Reef, offering an introduction to wall diving. The topography features a gentle slope transitioning into a drop-off that descends from 5 to 25 metres, with an average depth of 15 metres. The wall face provides natural shelter, resulting in mild currents suitable for beginners. Visibility typically ranges from 15 to 30 metres. Divers should be aware of potential hazards including boat traffic, jellyfish, and sharp coral formations. Water temperatures remain between 25 and 29C year-round. Guided tours and equipment rental are available via local boat charters.

Boulders is a beginner-friendly boat dive located at Flynn Reef, featuring a combination of reef and wall topography. Divers can explore shallower reef sections starting at 8 metres, with the site extending to depths of 30 metres. Conditions are generally manageable, with mild currents and visibility ranging from 10 to 30 metres. Water temperatures remain warm throughout the year, fluctuating between 25C and 29C. When navigating the site, be aware of sharp coral and rocks near the wall. Divers should shuffle their feet when near sandy or rocky patches to avoid contact with stonefish, and maintain a safe distance from lionfish and sharks.

Tracey's Bommie is a coral pinnacle located on Flynn Reef, featuring a wall that descends to 30 metres. The site is well-suited for beginners due to mild currents and an average depth of 16 metres. Divers can explore the structure between 5 and 30 metres, with visibility ranging from 15 to 20 metres. Marine life recorded here includes wrasses, which are very common, alongside uncommon sightings of Napoleon Wrasse, Whitetip Reef Sharks, Regal Angelfish, Titan Triggerfish, and Bluespotted Fantail Rays. Rarer encounters include Giant Moray, Giant Trevally, and Broadclub Cuttlefish. Access is by boat only. Divers should be aware of jellyfish, particularly during the stinger season from November to May.

Three Sisters at Flynn Reef features three distinct coral bommies that form a wall dropping from 2 to 30 metres. This site is accessible only by boat and is well-suited for beginners due to mild currents. Divers can explore the reef structure, which hosts a variety of marine life including Napoleon Wrasse, Titan Triggerfish, Whitetip Reef Sharks, Giant Morays, and Giant Trevally. Very common sightings include various wrasses, while Red Bass, Freckled Hawkfish, Moorish Idols, and Blackspotted Pufferfish are also present. Visibility typically ranges between 15 and 30 metres. Divers should exercise caution regarding sharp coral and seasonal jellyfish, with protective suits recommended during the wet season.

The Whale at Milln Reef is an intermediate dive site featuring a varied reef system that transitions from shallow coral gardens at 2 metres to deeper sections at 26 metres. Divers can explore the reef structure, which includes gorgonian fans in current-swept areas and ledges sheltering small groups of Harlequin Sweetlips. Marine life recorded at the site includes Whitetip Reef Sharks, Titan Triggerfish, and Emperor Angelfish, alongside common sightings of wrasses and Red Bass. Visibility typically ranges from 15 to 20 metres. Access is by boat only, and divers should be aware of sharp coral edges and potential jellyfish during the stinger season from November to May.