Flat Rock - Shark Alley is an advanced boat dive known for seasonal grey nurse (
Flat Rock - Shark Alley is an advanced boat dive known for seasonal grey nurse (
Flat Rock - Shark Alley is a deeper boat dive on an exposed reef system off southeast Queensland, best known for seasonal grey nurse shark encounters. The site runs along a narrow alley between reef sections, creating a more purposeful reef route than a broad, casual drift. It is primarily aimed at advanced scuba divers because conditions, distance from shore, and wildlife focus all demand a higher comfort level. Planning should be conservative, with attention to boat access, depth awareness, and changing offshore conditions.
Depth range, seasonality, and planning context.
Reported Depth
12m - 28m
Depth Note
The reef rises on either side of the alley, with the deeper section in the middle.
Best Season
Seasonal shark aggregation period.
Typical Conditions
Offshore reef conditions with a wildlife-focused dive profile; plan for variable open-water weather and boat-based access.
Hazards, restrictions, and access requirements.
Key Hazards
Safety Notes
Best suited to experienced divers who are comfortable with offshore boat dives and close wildlife encounters. Keep awareness high around depth, buoyancy, and changing conditions.
Community notes to help plan your visit.
Scuba Diving
A boat-accessed reef dive with a narrow alley profile and a stronger emphasis on advanced buoyancy, gas planning, and situational awareness.
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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