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Seasonality and visibility guidance for the Poor Knights dive area.
Dive Spot Guide•
Southern Arch
Southern Arch is a steep boat dive in the Poor Knights.
A boat-accessed Poor Knights arch dive with steep walls, strong current, and reserve rules; best for confident divers.
About Southern Arch
Southern Arch is a steep offshore arch in the Poor Knights Marine Reserve, with vertical walls that rise to a shallow northern end and drop much deeper to the south. The site sits in clear subtropical water where strong current can sweep schools of fish along the walls, while sponge gardens, gorgonians, and invertebrates cover the rock. It suits confident divers who want an exposed arch profile and reserve-scale marine life rather than a sheltered lagoon dive.
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Research Estimate At Southern Arch
Conservative baseline from public research. No community dives logged yet.
VisibilityVisibility: 20m
AccessModerate entry effort
CoralHealthy coral
Aquatic LifeExceptional variety
FacilitiesBasic facilities
CurrentStrong current
Where Is Southern Arch?
This spotNearby spotsExplore nearby spots on the map
Community sourced coordinates.
Southern Arch Planning Details
Depth range, seasonality, and planning context.
Reported Depth
10m - 40m
Depth Note
Northern end rises to about 10 m; southern end drops to 40 m or more.
Best Season
Late summer through winter is the safer window for clearer water and steadier conditions.
Typical Conditions
Steep walls, strong current, and clear-water conditions make Southern Arch a high-energy arch dive.
Safety & Access At Southern Arch
Site conditions, restrictions, and access requirements.
Site Conditions
Strong currentOverhead environment
Safety Notes
Strong current and steep walls call for good buoyancy, reserve awareness, and a clean kit.
Access Restrictions
Boat access only; plan the dive as a charter run from Tutukaka.
Legal Notes
The Poor Knights is a marine reserve, so no fishing, collecting, or disturbing marine life is allowed.
Local Intel For Southern Arch
Community notes to help plan your visit.
Scuba Diving
A steep arch dive with vertical walls, a shallow northern end, and a deeper southern drop inside a marine reserve.
Freediving
Only for advanced freedivers in calm conditions; the current and deep southern end make scuba the better fit.
Snorkeling
Not a primary snorkel site; the arch is better experienced from a boat dive or surface cruise than from casual shoreline access.
Wildlife at Southern Arch
Species commonly reported at this site, with direct links into their wildlife guides.
Recent Logged Visits At Southern Arch
Community dive logs and visit reports for this site.
Dive Spot Log Averages At Southern Arch
Average conditions based on logged dives & visits.
Conditions
Avg. Visibility20m
Activity
No dive activity logged yet.
