Cheviot Beach is a challenging shore dive located in Sorrento, Australia, suitable only for expert divers. The site features a reef environment at depths ranging from 5 to 15 metres. Conditions are demanding, characterised by strong permanent rip currents, surf, and surge. Surf Life Saving Australia rates the beach as extremely hazardous, and swimming is prohibited. Divers must navigate sharp coral and variable visibility. Access is via the shore, with parking available nearby. It is essential to scout the entry point carefully and time dives around slack periods, avoiding the site after recent swells. The site is best approached during the calmer months of December through May.

Spectacular Reef in Sorrento is a wall and drop-off site located 1000 metres offshore within a major shipping channel. The topography features shallow sections at 6 to 9 metres, with the main reef dropping to depths between 15 and 33 metres. Due to strong tidal currents, this site must be dived at slack water and is suitable for advanced divers only. Visibility ranges from 3 to 20 metres. Divers should be aware of significant boat traffic and use a surface marker buoy during ascent. The reef structure is characterised by ledges and crevices that support soft corals and sponges.

The Eliza Ramsden is an artificial reef wreck located 2000 metres offshore in the South Shipping Channel near Sorrento. Resting at depths between 14 and 22 metres, the site is suited for intermediate divers due to the requirement for precise timing. The wreck is subject to strong tidal currents, necessitating dives during slack water to ensure safety. Visibility ranges from 7 to 20 metres, with the clearest conditions typically occurring during the winter months. Divers must remain vigilant regarding heavy boat traffic in this active shipping channel. Access to the site is by boat only, with local charters and guided tours available for those planning a visit.

Flat Rock is a reef site located near Port Phillip Heads, offering depths between 12 and 25 metres. The topography features a mix of reef sections, caves, and overhangs, which require awareness of the overhead environment. Due to its proximity to the heads, the site is subject to moderate to strong tidal currents and surge; diving must be timed for slack water. Visibility is highly variable, ranging from 1 to 20 metres. Access is by boat only, and guided tours are available for those unfamiliar with the local conditions. The water temperature ranges from 13C to 18C, necessitating appropriate thermal protection.

Lonsdale Wall is a vertical reef and cave system located at the entrance to Port Phillip Bay. The wall drops from 12 to 45 metres, with an average depth of 25 metres. Due to its position in a high-velocity tidal zone, this site is strictly for advanced divers and requires boat access. Dives must be timed precisely for slack water to manage strong currents, and the site is often dived as a drift. Divers should be prepared for deep diving conditions, potential decompression requirements, and active shipping traffic. Visibility typically ranges from 5 to 15 metres, and water temperatures fluctuate between 13C and 18C throughout the year.

Boarfish Reef in Portsea is a drift dive site characterised by strong currents ranging from 1 to 4 knots. Divers explore the reef structure at depths between 10 and 22 metres, with an average depth of 16 metres. Due to the significant currents and proximity to the hazardous Port Phillip Heads area, this site is suited for intermediate divers with drift experience. Visibility typically fluctuates between 10 and 25 metres. Boat access is required, and divers must remain vigilant regarding heavy boat traffic and large ships in the vicinity. The use of a surface marker buoy is essential for safe ascents.

Catch Bag Reef is a boat-accessible site located in Portsea, Australia, featuring depths between 16 and 18 metres. This reef is a drift dive site, which must be conducted on the flood tide due to moderate to strong currents. Visibility ranges from 10 to 30 metres. Divers frequently encounter Western Blue Devil, wrasses, and sea stars. Other species recorded at the site include Port Jackson Shark, Southern Rock Lobster, Fiddler Ray, and various nudibranchs. Given the current, this site is suitable for intermediate divers who should plan their entry and exit to align with the water flow.

Lonsdale Reef is a complex site featuring a combination of reef, wall, pinnacle, and wreck topography. Located in the entrance to Port Phillip Bay, the site is subject to extremely strong tidal currents. Diving is restricted to the short slack water window, which can last as little as 30 minutes. Depths range from 10 to 45 metres, with an average of 16 metres. Visibility varies between 10 and 30 metres. Due to the challenging currents, heavy boat traffic, and potential for surge, this site is suitable for intermediate to advanced divers. Access is available by both shore and boat, with the site situated 1000 metres from the shore.