Heron Island offers a varied underwater landscape featuring a coral reef, a pinnacle, and a canyon. Divers can explore this terrain at depths ranging from 5 to 18 metres, with an average depth of 15 metres. Visibility typically fluctuates between 10 and 25 metres. Entry is possible from both shore and boat, though shore entries require caution regarding sharp coral and boat traffic. Currents are generally moderate, making this a suitable location for beginners. Facilities include equipment rental, air fills, and guided boat tours. Typical dives last approximately 45 minutes, and night diving is available.

The Underwater Observatory at Heron Island offers a shallow marine environment featuring a combination of natural reef and artificial structures. With depths ranging from 1 to 6 metres and an average of 3 metres, the site is suitable for beginners. Access is by boat. Conditions include mild currents and water temperatures between 22C and 28C. Visibility is variable and often best on calm mornings. Divers and snorkellers should be aware of jellyfish, particularly during the stinger season from October to May. Equipment rental and dive shop facilities are available on the island. Guided tours are recommended to assist in locating specific marine residents.

North Bombie is a reef and pinnacle site located 500 metres off Heron Island. Suitable for intermediate divers, the site features depths ranging from 5 to 20 metres with an average of 15 metres. Visibility typically spans 10 to 25 metres, though moderate currents are common and can strengthen. Access is by boat only, and divers should be prepared for potential hazards including sea urchins, stonefish, sharp coral, and sharks. The site is suitable for night diving, with typical dive times around 45 minutes. Divers are advised to time their entry around slack water to manage current strength and maintain neutral buoyancy to avoid contact with the reef structure.

Pams Point at Heron Island features a reef and central pinnacle structure, offering a clear focal point for navigation. Depths range from 5 to 17 metres, with an average of 15 metres, making the site suitable for beginners. Visibility typically remains between 10 and 15 metres. Access is by boat only, and divers should be prepared for mild currents that can occasionally strengthen. Hazards include sea urchins, sharp coral, and sharks. Divers should exercise caution with fin placement near staghorn coral and shuffle feet when entering to avoid urchins. Arriving early in the day often provides calmer conditions before wind chop develops.

Coral Grotto is a reef and cavern site located off Heron Island, Australia. Accessible only by boat, the site features depths between 5 and 20 metres, with an average of 15 metres. Visibility varies significantly from 7 to 30 metres. Divers frequently encounter green sea turtles, spotted eagle rays, and blacktip reef sharks. Other species recorded include hawksbill and loggerhead turtles, giant guitarfish, epaulette sharks, whitetip reef sharks, and lemon sharks. The site is suitable for beginners, though divers must remain aware of strong currents and boat traffic. Guided tours and equipment rentals are available locally. Night diving is permitted at this location.

Gorgonian Wall at Heron Island is a reef wall site defined by its large fan corals. The site is suitable for beginners, with depths ranging from 11 to 20 metres and an average depth of 15 metres. Visibility can reach up to 35 metres. Access is strictly by boat, and the site is often conducted as a drift dive due to mild currents. These currents are beneficial for observing the feeding gorgonian fans. Divers should be aware of potential hazards including jellyfish, sharks, sharp coral, and stonefish. Guided tours and equipment rental are available on the island to support your dive.

Birthday Beach at Heron Island offers a gentle drift dive experience suitable for beginners. Divers can explore depths ranging from 5 to 25 metres, with an average depth of 15 metres. The site features a mild current, allowing for relaxed observation of the underwater terrain. Visibility typically fluctuates between 10 and 30 metres. Access is exclusively by boat. Divers should be aware of potential jellyfish encounters, particularly during the stinger season from November to May. Local conditions are generally calmest between May and October, making this period ideal for visiting.

Blue Pools at Heron Island provides a gentle reef environment suitable for beginner divers. The site features depths ranging from 8 to 20 metres, with an average depth of 11 metres. Visibility is generally high, between 15 and 30 metres, supported by mild currents. Access is available via both boat and shore entries. Divers should be aware of potential hazards including jellyfish, lionfish, and strong currents. Stinger suits are recommended between November and May. Facilities at the site include equipment rental, air fills, and guided tours. Typical dives last approximately 45 minutes, and the site is also suitable for night diving.