Adelaide Metropolitan Waters
| Location | 5 km west of Glenelg, Gulf St Vincent |
| Access | Boat dive from West Beach Boat Ramp |
| Depth | 18 metres |
| Difficulty | Easy |
| Activity | Scuba Diving |
| Region | Adelaide & Adelaide Hills |
| Accommodation | Camping, mid-range and premium options — See accommodation options |
| Established | 1983 |
| Position | 500 m southeast of the Glenelg Barge |
An Artificial Reef That Became a Fish City
Five kilometres west of Glenelg, in 18 metres of water, a collection of tyre tetrahedrons sits quietly on the sandy seabed — the remnants of a 1983 experiment in artificial reef creation that has exceeded every expectation. The Glenelg Tyre Reef has become one of the most productive fish breeding grounds in Adelaide’s metropolitan waters, attracting large quantities of whiting, bullseyes, strongies, silver drummer, old wives, and spider crabs in numbers that make every dive a lively encounter with marine life.
The reef sits 500 metres southeast of the Glenelg Barge wreck, placing it within easy reach of divers doing double-dive trips in this area. The combination of the tyre reef, the barge, the nearby South Australian wreck, and the Broken Bottom reef creates a cluster of dive sites off Glenelg that can fill multiple dive days with varied and rewarding underwater experiences.
The Dive Experience
The tyre tetrahedrons — pyramid-shaped structures made from old tyres strapped together — were designed to mimic the structure of natural reef, providing shelter, shade, and attachment surfaces for marine organisms. Over four decades, they have been colonised by sponges, algae, and invertebrates that form the base of a food chain supporting impressive fish populations. Schools of bullseyes cluster in the shelter of the structures, while whiting forage on the sandy seabed between the tetrahedrons.
The main hazard for divers is getting loose regulators and gauges caught in the tyre straps that hold the structures together. Streamlining your equipment and maintaining good buoyancy control will minimise this risk. The open nature of the reef means navigation is straightforward, and the 18-metre depth allows comfortable bottom times for recreational divers.
Planning Your Dive
Access is by boat from the West Beach boat ramp. The site pairs well with the nearby Glenelg Barge and Broken Bottom for multi-dive outings. Standard open water diving equipment is sufficient. The site is best dived in calm conditions with good visibility. Several Adelaide dive operators include the tyre reef in their regular boat dive schedules.
The Glenelg Tyre Reef is proof that sometimes the most unassuming structures become the most productive habitats. What began as an experiment in artificial reef creation has become a thriving marine community that rewards every visit with fish life, colour, and the quiet satisfaction of diving a site that continues to grow richer with each passing year.
Where to Stay
Planning an overnight trip? See our Adelaide Hills Accommodation Guide for the best places to stay near this trail.