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Pseudopanax CC BY-SA 4.0 Wikimedia Commons

Secretary Island

Island

An uninhabited island in Fiordland National Park, New Zealand, accessed by boat from Doubtful Sound; cruise passengers look for coastal wildlife, steep forested slopes and secluded fiord scenery.

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In this guide

Secretary Island essentials

Country: New Zealand
Driest months: Jun-Aug
Pay in: Dollar ($)
Language: English

Secretary Island at a Glance

About Secretary Island

Secretary Island is an uninhabited island in Fiordland, New Zealand, located in the Doubtful Sound / Patea area of Fiordland National Park. The island is rugged and largely covered in native forest and scrub.

There are no permanent settlements or visitor facilities on the island; human access is by boat only and visits are typically limited to conservation work or guided excursions that land briefly. The island forms part of the remote coastal and fiord landscape characteristic of Fiordland.

As part of Fiordland National Park the island is within a protected natural area and forms part of regional conservation and marine-park networks. It lies within the fiord system west of the South Island and is reached from regional departure points such as Deep Cove and other Doubtful Sound access locations.

Geographically Secretary Island sits inside the Doubtful Sound / Patea complex in Fiordland, southwest New Zealand, amid steep-sided fiords and adjacent to the mainland fiord coast.

  • Boat access only: Uninhabited and accessible only by boat, so visits require private or chartered water transport from nearby Fiordland departure points.

Tips for Visiting Secretary Island

  • Secretary Island lies inside Fiordland's marine/fiord landscape and is reachable only by boat; the island is most commonly seen on Doubtful Sound and Dusky Sound cruises rather than reached by road.
  • Book a small-boat wildlife or eco-cruise if you want a closer, quieter view-large sightseeing tours often stay farther offshore and crowd the most popular viewing spots.
  • Bring binoculars and plan for variable weather windows: many operators run shorter trips that time crossings to calmer conditions for better wildlife and shoreline viewing.
When to Go

Best Time to Visit Secretary Island

Secretary Island is best visited in New Zealand's summer (December-March) when sea conditions and daylight are most favorable for boat access and exploring conservation sites.

Summer (best for access and calm weather)
December-March · ~10-20°C (50-68°F)
Austral summer brings the warmest, most settled weather and longer daylight-best time for boat access, wildlife viewing and walking around the island's conservation areas.
Shoulder seasons (variable conditions)
November and April · ~5-15°C (41-59°F)
Transitional weather with increasing chances of rain and rougher seas; fewer visitors but boat operators may run fewer trips.
Winter (rough seas and limited access)
May-October · ~0-10°C (32-50°F)
Colder, wetter conditions in Fiordland with rougher seas-access is more difficult and many tours do not operate or run reduced schedules.

Weather & Climate near Secretary Island

Climate

Secretary Island's climate is classified as Oceanic - Oceanic climate with cool summers (peaking in February) and cold winters (coldest in July). Temperatures range from 3°C to 16°C. Heavy rainfall (2339 mm/year), wettest in October.

Air Quality: AQI 23 Good
Temperature & Rainfall
Temperature Range
16°
Warmest Month
3°
Coldest Month
Monthly Conditions
Month Comfort Temp Feels Rain Sky Humidity Wind UV Daylight
January - 9° - 16° 13° 289 mm - - 8.1 m/s - -
February - 9° - 16° 13° 199 mm - - 7.2 m/s - -
March - 9° - 15° 12° 210 mm - - 7.1 m/s - -
April - 7° - 12° 7° 136 mm - - 6.3 m/s - -
May - 5° - 10° 4° 146 mm - - 6.7 m/s - -
June - 3° - 8° 2° 154 mm - - 5.9 m/s - -
July - 3° - 8° 2° 136 mm - - 5.2 m/s - -
August - 3° - 8° 2° 119 mm - - 6.3 m/s - -
September - 4° - 10° 3° 163 mm - - 7.5 m/s - -
October - 5° - 11° 4° 291 mm - - 7.7 m/s - -
November - 6° - 13° 6° 253 mm - - 8.7 m/s - -
December - 8° - 15° 12° 243 mm - - 7.5 m/s - -