Sources · Destination Guide

Mercury Islands (Coromandel Peninsula)

Wild kelp forests and predator free islands off the Coromandel coast

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.
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