Boat-access rocky reef with a swim-through cave and a reputation for being a go-
Boat-access rocky reef with a swim-through cave and a reputation for being a go-
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Shag Rock - Horseshoe is a rocky reef dive with a short boat access and a swim-through cave linking both sides of the site. It is presented as a sheltered option relative to some nearby dives, so it may be chosen when local conditions are less favourable elsewhere. The layout suggests a reef-focused scuba dive rather than a relaxed shallow swim, with extra attention needed around the overhead section. Plan for a boat-based trip and conservative cave procedures.
Depth range, seasonality, and planning context.
Typical Conditions
Often selected when nearby sites are less favourable, but it remains an exposed rocky reef rather than a fully protected lagoon.
Hazards, restrictions, and access requirements.
Key Hazards
Safety Notes
The swim-through cave is an overhead section, so buoyancy control, buddy awareness, and a clear exit plan matter.
Community notes to help plan your visit.
Scuba Diving
Both sides of the reef can be explored, with a swim-through cave connecting the areas and adding interest for confident divers.
Community dive logs and visit reports for this site.
Average conditions based on logged dives & visits.
Planning answers for access, conditions, timing, and site logistics.
Last Updated
Research Sources
Brisbane and Moreton Island (Mulgumpin) Diving Guide | DiveJourney | Brisbane is the easiest big-city gateway to the sand islands and reefs of Moreton Bay. A short ferry ride puts you on Moreton Island (Mulgumpin), where the famo | Brisbane and Moreton Island (Mulgumpin)
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Sheltered reef dive at Shag Rock - Sanctuary Cove with strong macro appeal and a
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