Four Mile Reef is a boat-access dive site located 7408 metres off the coast of Busselton, Australia. The reef sits at depths between 15 and 18 metres and is suitable for beginner divers due to the mild currents. As visibility can vary considerably, it is recommended to check conditions and book through a local dive shop before heading out. Guided tours are available to assist with navigation and to help identify the best areas of the reef on the day. The site offers a straightforward diving experience in water temperatures ranging from 17 to 21 degrees Celsius.

Castle Rock in Busselton is a gentle shore-entry reef site suitable for beginners. The area is sheltered from southwesterly winds and swells, resulting in calm, tranquil conditions with visibility ranging from 10 to 25 metres. The seafloor features a mix of seagrass beds, sponges, and corals. Divers should be aware of mild currents and sharp coral edges. Species recorded around this area include weedy seadragons, spotted wobbegongs, various nudibranchs, rays, and wrasses. Facilities at the site include parking and toilets. Water temperatures typically range between 18C and 21C during the peak season. Wear water shoes or booties to protect your feet during entry.

The HMAS Swan is a decommissioned Royal Australian Navy destroyer resting upright on the sandy seabed near Busselton. The wreck sits at a maximum depth of 31 metres, with the superstructure rising to 5 metres. Access is by boat only. Conditions are generally manageable with mild currents and visibility ranging from 10 to 30 metres. The site is suitable for intermediate divers, though it presents hazards including overhead environments, entanglement risks, and sharp protrusions. Large holes cut into the hull facilitate penetration for qualified divers. Species recorded around this area include various wrasses, nudibranchs, rays, and wobbegongs, while the structure itself supports soft coral growth.

Meelup Beach in Busselton is a sheltered shore dive suitable for beginners. The site features a mix of seagrass beds and reef patches at depths ranging from 6 to 9 metres, with an average depth of 6 metres. Divers can expect mild currents and visibility between 10 and 25 metres. The protected bay provides calm, flat water conditions, though divers should remain aware of boat traffic in the area. Facilities at the beach include parking, toilets, showers, and changing rooms, making it a convenient location for shore-based activities. Night diving is also possible at this site.

Gannet Rock is a shallow reef site in Busselton, Australia, offering a straightforward shore entry. The site is suitable for beginners, though snorkelers and divers should remain aware of surge near the reef structure, particularly during periods of swell. Visibility typically ranges from 10 to 25 metres. Water temperatures between September and May fluctuate between 18C and 21C. Facilities including parking and toilets are available on site. Visitors are advised to arrive early in the morning when surge conditions are generally calmer and visibility is optimal. Hazards include boat traffic and the presence of an overhead environment within the reef structure.

Castle Rock is a shallow reef site in Busselton, Australia, offering depths between 2 and 10 metres with an average of 6 metres. This shore dive is suitable for beginners, though entry and exit require caution due to potential surf and sharp barnacles or oysters on the rocks. Conditions are best in calm weather, as surge can be present around the reef structure and swim-throughs. Visibility typically ranges from 3 to 15 metres. Species recorded around this area include various wrasses, nudibranchs, rays, and octopuses. Facilities at the site include parking, toilets, showers, and a cafe. Night diving is possible, with typical dives lasting around 50 minutes.

Eagle Bay in Busselton offers a shallow, protected environment suitable for beginners. The site features a mix of reef and seagrass habitats at depths ranging from 1 to 5 metres. As a north-facing bay, it remains sheltered from prevailing south-westerly winds, providing generally calm conditions with visibility between 10 and 25 metres. Entry is directly from the shore, with the main reef area located approximately 50 metres out. Divers and snorkellers should be aware of potential boat traffic and the presence of bluebottle jellyfish. The site is located within a sanctuary zone of the Ngari Capes Marine Park where all fishing is prohibited.

Bunker Bay near Busselton is a shore-entry reef dive suitable for beginners. The site features depths ranging from 1 to 18 metres, allowing divers to remain in the shallows or explore deeper sections. Visibility typically varies between 10 and 30 metres, with the best conditions found on calm mornings. Divers should exercise caution regarding hazards including surf, rip currents, jellyfish, sea urchins, sharp coral, and stonefish. Shuffle your feet when entering and exiting the water to avoid injury from urchins or rocks. Facilities at the site include parking and toilets. Typical dives last approximately 45 minutes, and the site is accessible year-round.