

The Cables is a shore dive combining natural reef and artificial structures with seagrass beds, giving you a decent range of habitats across a single entry. Depths run from the shallows down to 28 metres in the deeper sections, and visibility can reach 30 metres on a good day, though it varies considerably. The real draw here is the chance to find both leafy and weedy seadragons, often tucked among the seagrass. Western blue devils, blue grouper, nudibranchs, and scorpionfish round out the resident life. Mild current keeps conditions manageable, but watch for surf on entry, surge at depth, and boat traffic throughout the dive.
-32.01630, 115.74950
September through May offers the most reliable conditions, so plan around that window if you can. Take your time moving slowly through the seagrass beds rather than heading straight for depth, as the seadragons are easy to miss if you rush past.
Access is from Mosman Beach, also known as Cable Station beach. Parking is available along Curtin Avenue near the Vlamingh Memorial and the Old Cable Station building. The entry is a 700m stretch of sand at the base of 10m high bluffs.
The site is an artificial surfing reef, so swell and surf can be a significant hazard. It is also used by surfers. The old cables themselves can present an entanglement or overhead environment hazard.
Depth
8-28m
Visibility
3-15m
Skill Level
Intermediate
Entry
Boat
Boat required
Water Temp
-1-29°C
Current
Mild
Typical Dive
50 min
Best Time
Jan, Feb, Mar, Apr, May, Sep, Oct, Nov, Dec
The Cables in Perth, Western Australia is renowned for encounters with both leafy seadragons and weedy seadragons, making it one of the few sites where both species can be observed. Divers also regularly spot western blue devils, blue grouper, scorpionfish and a variety of nudibranchs along the reef structures. The site's varied depth range from 2 to 28 metres provides habitat for diverse marine species across different zones.
The Cables requires an Open Water certification as a minimum qualification for diving. The site's intermediate skill level designation reflects navigation challenges, mild currents and potential surf conditions that require basic open water diving competency. Depths extend to 28 metres, which falls comfortably within Open Water certification limits.
The Cables offers optimal diving conditions from September through April, covering the Australian spring, summer and early autumn months. During this eight-month window, water temperatures range from comfortable levels up to 29 degrees Celsius with visibility often reaching 30 metres. Winter months see reduced visibility and colder water temperatures that can challenge thermal protection.
The Cables is accessible via both shore entry and boat, with parking facilities available for shore divers near Perth. Shore access allows divers to enter directly without chartering a boat, making it a cost-effective option for local and visiting divers. Both entry methods provide access to the site's full depth range of 2 to 28 metres.
The Cables presents several hazards including surf and surge conditions that can make entries and exits challenging, particularly during weather changes. Boat traffic poses a risk due to the site's accessibility and popularity, requiring divers to deploy surface marker buoys and maintain awareness. Sharp coral structures throughout the site require careful buoyancy control to avoid contact injuries.
The Cables ranges from 2 metres at the shallowest sections to a maximum depth of 28 metres on the deeper reef structures. This depth range allows divers to plan multi-level profiles and spend extended bottom time in the shallower zones where seadragons are commonly found. The varied topography creates distinct depth zones with different marine life communities.
The Cables is classified as an intermediate dive site and requires divers to have experience beyond basic certification. Conditions including mild currents, surf, surge and boat traffic require solid buoyancy control and navigation skills that newly certified divers may still be developing. The site's maximum depth of 28 metres and environmental hazards make it more appropriate for divers with logged experience.
The Cables has no entry fee for diving, making it a freely accessible site for certified divers in the Perth area. While the dive itself is free, divers should budget for air fills, transport and optional boat charter fees if choosing boat access over shore entry. Parking is available at the shore access point at no additional cost.
A drysuit recommended is recommended for diving at The Cables in Perth. Water temperatures range from -1°C to 29°C.
The Cables in Perth has depths ranging from 8 metres to 28 metres.
A typical dive at The Cables in Perth lasts approximately 50 minutes. Actual dive time depends on depth, air consumption, and conditions.