Goat Island & Hauraki Gulf, New Zealand
    Rabbit Island

    SAIL ROCK - 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 - SAIL ROCK - 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

    Sail Rock, just a dash out from Goat Island, is one of those spots we always try to hit when we're in the Hauraki Gulf. It’s a proper standout for a reason, despite that sometimes lumpy ride out there. We love it when the swell is down, making the northern side accessible. That's where you’ll often find us hanging out, keeping an eye out for larger pelagics moving through. Drop in, and you're immediately enveloped by the kelp, the sunlight dappling through the fronds. It's an altogether different feel from some of the more southerly reefs. We've had fantastic encounters with massive short-tail stingrays here, gliding over the rocky reef before it gives way to sand around 18-20m. Keep your eyes peeled for those distinctive New Zealand Draughtboard Sharks tucked away. Visibility averages around 8 metres, which, for New Zealand, is pretty good. It’s easy to navigate, just circumnavigate the rock, but do respect those currents; they can pick up quickly. For us, it’s the thrill of seeing something a bit bigger, like a bronze whaler cruising by, that makes Sail Rock so consistently exciting. Divers here can expect a solid New Zealand reef dive, with a good chance of encountering large rays and local shark species. It suits divers who appreciate a site with a bit of a wild edge, offering rewarding sightings for those willing to brave the sometimes exposed conditions.

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    Conditions

    Ocean conditions, forecast and tides for SAIL ROCK - GMI

    SAIL ROCK - GMI Ocean Conditions

    Monthly averages for SAIL ROCK - 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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