10000birds.com · Community
Eastern Arch trip report describing wildlife and exposed surface conditions.
Dive Spot Guide•
Eastern Arch
Open-ocean archway dive on Poor Knights' eastern edge.
ScubaBoat EntryAdvanced
DeepWall
Boat-only advanced dive with a kelp-lined entrance, sponge-covered walls, and an exposed seaward exit where weather and current shape the plan.
About Eastern Arch
Eastern Arch is an advanced Poor Knights wall-and-arch dive where a kelp-framed western entrance leads into steep sponge-coated walls and a more exposed blue-water exit on the outer side of the islands. The site is prized for dramatic structure rather than easy shelter. Divers usually work the line the skipper chooses for the day, watching for nudibranchs, moray eels, schooling fish, and passing rays as the arch opens toward the open ocean.
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Research Estimate At Eastern Arch
Conservative baseline from public research. No community dives logged yet.
VisibilityVisibility: 15m
AccessChallenging entry effort
Marine LifeGreat variety
FacilitiesLimited facilities
Current StrengthModerate current
Where Is Eastern Arch?
This spotNearby spots
Community sourced coordinates.
Eastern Arch Planning Details
Depth range, seasonality, and planning context.
Reported Depth
18m - 40m
Depth Note
Western entrance is around 18 m; eastern end drops vertically into 40 m+.
Best Season
Late summer through autumn is commonly favored for warmer water and reliable boat days, while settled winter periods can bring the clearest water.
Typical Conditions
Usually dived in clear blue water with kelp near the entrance, sponge and invertebrate growth on the walls, and more water movement toward the seaward mouth.
Safety & Access At Eastern Arch
Hazards, restrictions, and access requirements.
Key Hazards
Overhead environment
Safety Notes
Includes an overhead arch and a steep drop-off into deeper water; appropriate training and depth management are important.
Access Restrictions
Boat access only within a fully protected marine reserve; operators choose whether the exposed outer-island conditions are suitable on the day.
Legal Notes
Eastern Arch lies inside the Poor Knights Islands Marine Reserve and Nature Reserve, where fishing and collecting are prohibited and public landings are generally restricted without a permit.
Local Intel For Eastern Arch
Community notes to help plan your visit.
Scuba
A wall-and-arch dive starting around 18 m and progressing to a vertical drop into 40 m+ with an open-ocean outlook.
Freedive
Not a typical freedive site. The exposed outer-island setting, boat logistics, and advanced underwater terrain make it better suited to scuba-led runs.
Snorkel
Generally unsuitable for casual snorkeling because the site is boat-only, exposed, and planned around advanced diving conditions rather than easy surface shelter.
Eastern Arch Dive Conditions Planner
Use the planner to scan this week, inspect today in local time, and understand how exposure shapes conditions at Eastern Arch.
Current Snapshot
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🌥️Variable
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Surface / Entry
Wind No data · Tide No data
Sea State
Swell No data · Period unavailable
Visibility Outlook
Rain chance No data
Wind
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Swell
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Exposure Profile at Eastern Arch
Directional shelter context for incoming swell.
Exposure Note
Hourly forecast data is not available yet.
Wildlife at Eastern Arch
Species commonly reported at this site, with direct links into their wildlife guides.
Recent Logged Visits At Eastern Arch
Community dive logs and visit reports for this site.
No Dive Logs Yet
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Dive Spot Log Averages At Eastern Arch
Average conditions based on logged dives & visits.
Conditions
Avg. Visibility15m
Activity
No dive activity logged yet.
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Eastern Arch Guide - Frequently Asked Questions
Planning answers for access, conditions, timing, and site logistics.
Eastern Arch Guide - Sources and Updates
Last Updated
Research Sources
divenow.co.nz · Operator
Eastern Arch structure, boat passage scale, and arch-site planning context.
www.diveplanit.com · Dive Directory
Typical Poor Knights visibility, marine life, and access logistics.
www.doc.govt.nz · Official
Marine reserve rules, access restrictions, and reserve context.
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