Sources · Destination Guide

Mercury Islands (Coromandel Peninsula)

Wild kelp forests and predator free islands off the Coromandel coast

Updated Nov 21, 2025 • 9 sources

Research Sources

Destination Guide Sources For Mercury Islands (Coromandel Peninsula)

Reference links used to build and maintain this guide.

9 sources • Updated Nov 21, 2025

Written by DiveJourney. Built from public sources and local operator knowledge. Last updated Nov 21, 2025.

Dive Zone Whitianga - The Mercury Islands - Local dive operator overview of the Mercury Island group and access from Whitianga.
DOC - Coromandel offshore islands and nature reserves - Official information on protection, pest free status and public access restrictions for the Mercury and nearby islands.
Ahuahu - Great Mercury Island official site - Background on Ahuahus conservation work, biosecurity requirements, pest free status and visitor guidance.
MPI - Boating and fishing rules at Great Mercury Island (Caulerpa CAN) - Details of Controlled Area Notice restrictions on taking marine life and gear cleaning to contain exotic Caulerpa.

Research Sources

Reference links used to build and maintain this guide.

9 sources • Updated Nov 21, 2025

Written by DiveJourney. Built from public sources and local operator knowledge. Last updated Nov 21, 2025.

Dive Zone Whitianga - The Mercury Islands - Local dive operator overview of the Mercury Island group and access from Whitianga.
DOC - Coromandel offshore islands and nature reserves - Official information on protection, pest free status and public access restrictions for the Mercury and nearby islands.
Ahuahu - Great Mercury Island official site - Background on Ahuahus conservation work, biosecurity requirements, pest free status and visitor guidance.
MPI - Boating and fishing rules at Great Mercury Island (Caulerpa CAN) - Details of Controlled Area Notice restrictions on taking marine life and gear cleaning to contain exotic Caulerpa.

Climate data - Whitianga sea and air temperatures - Representative air and sea temperature averages for Mercury Bay and surrounding coast.

Te Whanganui a Hei / Cathedral Cove Marine Reserve - Official tourism and DOC linked description of Cathedral Cove, Gemstone Bay snorkel trail and access considerations.

Visa, NZeTA and International Visitor Levy requirements - New Zealands visitor visa and NZeTA overview including IVL; cross checked with Immigration NZ for current processes.

Diver Emergency Service and New Zealand underwater safety - Local dive emergency hotline information and links to hyperbaric services in New Zealand.

Destination hero photo by Ferntech DJI - Photographer profile: https://unsplash.com/@djiferntech