Seacliff Reef, located near the Glenelg Dredge in South Australia, is a reef site reaching depths of 13 to 15 metres. Access to this site requires a boat, as it is situated 4000 metres from the shore. Divers should be prepared for variable conditions, with visibility ranging from 4 to 15 metres and water temperatures fluctuating between 13C and 22C. Due to the potential for surge and strong currents, this site is recommended for intermediate divers. It is advisable to check swell and current forecasts carefully before planning a dive. Facilities including toilets and showers are available in the area.

Horseshoe Reef is a shallow shore-accessible reef located 300 metres from the coast at Port Noarlunga. The site features depths ranging from 1 to 4 metres, with an average of 2 metres. Divers and snorkellers should be prepared for moderate currents, particularly strong northerly flows during large tides. Visibility is variable, typically between 1 and 4 metres. Due to the swim distance from shore and potential for currents, the site is suited to intermediate skill levels. Facilities including parking, toilets, and showers are available nearby. Visitors should remain aware of rip currents and the presence of jellyfish in the water column.

Port Noarlunga Reef is a protected marine sanctuary located 30 metres from the beach. This shore dive features a rocky reef system and kelp forests with depths ranging from 5 to 18 metres, averaging 6 metres. Divers can navigate through natural swim-throughs and sheltered areas. The site is suitable for beginners, though surge can occur over the reef and currents can be strong through The Gap. It is recommended to dive at the change of tide or during low tide. Water temperatures range from 13C to 22C, and a wetsuit is advised year-round. Facilities include parking, toilets, and an on-site dive shop for equipment hire and condition updates.

Milkies Reef is a compact reef structure located 4500 metres offshore from Glenelg. The reef rises approximately one metre from the seabed at a consistent depth of 17 metres. Divers encounter a variety of marine life including blue devilfish, spider crabs, cuttlefish, nudibranchs, leatherjacket fish, silver drummer, and crayfish among sponge gardens. This site is suited for intermediate divers due to moderate tidal currents that can strengthen unexpectedly. Visibility is typically 10 metres. Access is by boat only, and divers should plan their dive to work with the current. Water temperatures range from 13C to 22C throughout the year.

The Blocks at Glenelg Dredge is an accessible artificial reef structure located 500 metres from shore. This site features concrete formations set in a shallow, sandy environment, making it suitable for beginners. Divers and snorkellers can access the site via shore or boat, with depths ranging from 2 to 7 metres. Visibility typically fluctuates between 5 and 10 metres, and currents are generally moderate. Due to the proximity of the jetty, boat traffic is a constant hazard; divers should maintain a visible dive flag and remain alert for engines. The site offers a compact, shallow area ideal for extended exploration and muck diving across the sandy substrate.

Glenelg Tyre Reef is an artificial structure located at a depth of 18 metres off the coast of the Adelaide Metro area. Constructed from a matrix of tyres, the site requires precise buoyancy control to avoid entanglement with tyre straps. Divers should be aware of variable currents and potential boat traffic in this active coastal corridor. Visibility is typically around 10 metres. Due to the depth and structural hazards, this site is suited for advanced divers. Snorkelling is not recommended here, with a rating of 1/5. Divers must use a surface marker buoy during ascent to remain visible to passing vessels.

The Glenelg Dredge is an artificial reef and wreck located 5000 metres offshore from Adelaide. Resting at depths between 15 and 20 metres, the site is accessible by boat and suitable for beginner divers. Visibility typically ranges from 5 to 10 metres. The wreck features various openings, though penetration is only recommended for divers with specific overhead environment training and equipment. Tidal currents at the site can be strong and may increase rapidly, requiring careful planning. Water temperatures fluctuate between 13C and 22C throughout the year. Divers should remain aware of entanglement hazards within the structure and monitor buoyancy closely near enclosed sections.

Leather Jacket Alley is a shallow reef site located at the Glenelg Dredge, offering an average depth of 9 to 10 metres. Visibility is typically around 10 metres. The site is accessible by boat and is suitable for beginners, though divers should be aware that tidal currents can be strong at times. It is recommended to time dives around slack water to manage current conditions. Due to water temperatures ranging from 13C to 22C, a thick wetsuit or drysuit is essential year-round to protect against the cold. Facilities available nearby include parking, toilets, and a rinse station.