Mercury Bay reef-life and wall structure.
Mercury Islands reef with cracks, a swim-through arch, and kelpy rock structure.
Mercury Islands reef with cracks, a swim-through arch, and kelpy rock structure.
Pancake Rocks - Middle Island is an offshore Mercury Islands reef on the eastern side of the island, where cracks, gullies, and a swim-through arch sit in a kelpy rocky landscape. The site is typically reached by boat from Whitianga and rewards patient, calm-day diving with strong photo potential and plenty of structure to explore. It is the kind of place where the main job is reading the sea state and moving slowly along the reef rather than fighting for depth or distance.
Conservative baseline from public research. No community dives logged yet.
Depth range, seasonality, and planning context.
Reported Depth
0m - 11m
Depth Note
The site is commonly forecast around 11 m deep, with shallow reef and arch features near the top.
Best Season
Year-round, with the best forecasts usually in June to August when the water and sea state are at their most cooperative.
Typical Conditions
Typically good visibility; exposed to ocean conditions.
Hazards, restrictions, and access requirements.
Key Hazards
Safety Notes
The site is exposed; plan for swell and surge, and use extra caution when swimming through the archway.
Access Restrictions
Plan it as a reserve-area boat dive and avoid the site when swell, surge, or wind are up.
Legal Notes
Follow Mercury Islands reserve rules and skipper guidance, especially around landing and any no-take restrictions.
Community notes to help plan your visit.
Scuba Diving
Scuba is a good fit for the cracks, gullies, and arch when the sea is calm, but the site still suits slow, careful line choice.
Freediving
Freedivers can use the shallow reef on calm days, but the arch and exposed corners demand conservative decisions and a solid surface plan.
Snorkeling
Snorkeling only works when the sea is settled; the archway and exposed outer reef are better treated as diver terrain.
Species commonly reported at this site, with direct links into their wildlife guides.
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
Mercury Bay reef-life and wall structure.
Mercury Islands boat access and local dive-boats context.
Boat access from Whitianga and reserve-area context.
Cracks, gullies, swim-through arch, and exposed site notes.
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