Semaphore Breakwater is a shore-accessible artificial reef located 200 metres from the coast at Glenelg Dredge. This site is suitable for beginners, featuring shallow depths ranging from 1 to 5 metres with an average of 3 metres. Visibility typically spans 5 to 10 metres. Divers can encounter Shaw’s Cowfish, wrasses, and crabs, which are very common, alongside common flathead. Less frequently, divers may spot stonefish, Port Jackson sharks, fiddler rays, snake eels, shovelnose rays, mantis shrimp, slipper lobsters, pufferfish, and the rare long-nosed fur seal or cobbler carpet shark. Be aware of surf during entry and exit, and monitor for moderate currents and boat traffic.

Broken Bottom is a reef site located near the Glenelg Dredge in South Australia. This boat-accessible dive sits at an average depth of 10 metres, with a range between 10 and 12 metres, making it suitable for beginner divers. Visibility varies significantly from 2 to 10 metres, and divers should be aware of potential surge and tidal currents. Water temperatures fluctuate between 13C and 22C throughout the year, necessitating a 7mm or semi-dry wetsuit for comfort. Facilities including parking, toilets, and a rinse station are available. Divers are advised to check local conditions before departure, as settled weather is essential for optimal visibility and comfort.

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.

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.

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.

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.

Devil's Elbow Reef is a shallow site situated at a consistent depth of 5 metres, offering a straightforward experience for beginner divers. Access to the reef is by boat only. Divers should be prepared for low visibility, which typically ranges between 2 and 4 metres, requiring close observation of the reef environment. Water temperatures fluctuate significantly throughout the year, ranging from 13C in winter to 22C in summer. Due to these conditions, appropriate thermal protection such as a thick wetsuit or drysuit is essential for all dives. Guided tours are available to assist with navigation and site orientation.