Activities · Destination Guide
Cold-water kelp forests, a no-take marine reserve, and Great Walk wilderness in New Zealand's Deep South
Updated Feb 13, 2026 • 21 sources
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Stewart Island / Rakiura is about temperate wilderness diving: kelp forests, boulder reefs, and cold, clean water where invertebrates and seaweeds steal the show. The best-known protected area is the Ulva Island / Te Wharawhara Marine Reserve inside Paterson Inlet. Beyond the inlet, the island's remote south and west coasts (and Port Pegasus) reward experienced teams who can self-manage weather windows, boat logistics, and cold-water exposure. For access, local operators such as Rakiura Charters can water-taxi self-sufficient scuba divers to sites, but do not expect a full-service dive center vibe.
Ulva Island / Te Wharawhara Marine Reserve
Established in 2004, this 1,075hectare notake reserve protects kelp beds, reef fish, and exceptionally rich seaweed diversity (DOC highlights the area for its seaweed communities).
Paterson Inlet / Te Whaka a Te Wera Kelp Forests
Sheltered bays and channels make this the most reliable place to get underwater when the strait is rough.
Port Pegasus (Scout Bay and Micrometer Reef)
A remote southern harbor with granite walls, kelp, and the chance of larger wildlife when conditions allow.
North Arm and the sheltered bays of the Rakiura Track coastline
Tidedependent boat access opens up calm water along the inner coast of Paterson Inlet.
Foveaux Strait exposed reefs (weather window dives)
The strait can deliver excellent life and drama, but it is also where surge, chop, and current combine.
Operator Checklist
Conditions Fallback
Avoid