Goat Island & Hauraki Gulf, New Zealand
    Rabbit Island

    RED MERCS

    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 - RED MERCS offers some of Goat Island & Hauraki Gulf's richest wall 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
    CharacterWall dive
    StandoutRich in charismatic marine life

    Red Mercs is one of our absolute favourite sites around Goat Island, a proper New Zealand classic. The real magic here is the sheer density of fish. We've often dropped in to find ourselves completely enveloped by schools of demoiselles and swarms of snapper, so thick they almost block out the sun. It's a proper visual feast, the kind of dive where you just hang still and let the current bring the show to you. The site is essentially a series of rocky pins and ledges that drop down to about 18 metres, covered in kelp and soft corals. It's a bit exposed, so picking your day is key – we always check the swell reports carefully. When the conditions line up, though, the visibility can stretch to 15 metres, and the place just explodes with life. Keep an eye out for those big California yellowtail cruising through, and the vibrant flash of crimson cleaner fish zipping around the rocks. It’s a site that really rewards a slow, observant diver, perfect for those who love feeling part of a bustling underwater world rather than just passing through it.

    Today05:3918:2812h 49m daylightGolden hour 17:54

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    Conditions

    Ocean conditions, forecast and tides for RED MERCS

    RED MERCS Ocean Conditions

    Monthly averages for RED MERCS, 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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