Goat Island & Hauraki Gulf, New Zealand
    Rabbit Island

    CORALIE BAY - GMI

    Best months: Jan–Apr

    Protected Area

    Rabbit Island

    Why dive here

    With 72+ marine species recorded in the area - including blue sharks, dolphins, hammerhead sharks, humpback whales and seahorses - CORALIE BAY - GMI offers some of Goat Island & Hauraki Gulf's richest reef diving. Water ranges 15-21°C, warmest January, February, March.

    Best timeJan–Apr
    WetsuitA 5mm wetsuit
    Marine lifeBlue Sharks, Dolphins, Hammerhead Sharks, Humpback Whales and Seahorses · 72+ species recorded
    Water15-21°C · warmest January, February, March
    CharacterReef dive
    StandoutRich in charismatic marine life

    Coralie Bay, over on the eastern side of the Great Mercury Islands, is one of those places we often forget about but always remember fondly once we’re there. It's an easy dive, a perfect spot to just chill out and explore without battling any big currents. You drop in and find this classic New Zealand kelp forest, huge fronds swaying back and forth, filtering the sunlight into green shafts. We love drifting through those kelp tunnels; it feels like you're in a secret underwater garden. Look closely among the holdfasts for little blennies and triplefins, often camouflaged so well you'll swim right past them if you're not paying attention. The sandy patches between the rocky reefs are great for spotting rays settled on the bottom, and if you’re lucky, you might even catch a glimpse of an orca cruising through the bay – it’s happened to us a few times. Visibility usually sits around 8 metres, which is decent enough for exploring the reef’s contours and the numerous crayfish hiding in the cracks. It’s a solid pick for divers who want a relaxed experience and a good chance at spotting some larger visitors.

    Today05:4018:2912h 49m daylightGolden hour 17:55

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    Conditions

    Ocean conditions, forecast and tides for CORALIE BAY - GMI

    CORALIE BAY - GMI Ocean Conditions

    Monthly averages for CORALIE BAY - GMI, sourced from Open-Meteo marine data + Copernicus Marine (EU) - nearest station: Open-Meteo marine grid (-36.93, 175.86) (22km away)

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    October Averages

    Sea Temperature

    16°C

    60°F · Range: 14.5–16.9°C

    Current Speed

    1.41 cm/s

    Direction: SE (135°)

    Chlorophyll-a

    0.497 mg/m³

    Moderate productivity

    Salinity

    34.91 PSU

    Based on 4 years of monitoring data · Data sources: Open-Meteo marine data + Copernicus Marine (EU)

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