Poor Knights Islands, New Zealand
    Poor Knights Islands

    Blue MaoMao Arch

    Best months: Jan–Apr

    Protected Area

    Poor Knights Islands

    Why dive here

    With 79+ marine species recorded in the area - including blue sharks, dolphins, hammerhead sharks, humpback whales and orcas - Blue MaoMao Arch offers some of Poor Knights Islands's richest drift diving. Water ranges 15-22°C, warmest January, February, March.

    Best timeJan–Apr
    WetsuitA 5mm wetsuit
    Marine lifeBlue Sharks, Dolphins, Hammerhead Sharks, Humpback Whales and Orcas · 79+ species recorded
    Water15-22°C · warmest January, February, March
    CharacterDrift dive
    StandoutRich in charismatic marine life

    Blue Maomao Arch might just be our favourite Poor Knights spot, and that’s saying something. Drop in, and you’re immediately enveloped by thousands of blue maomao, a shimmering curtain that pulses with the light. We love hitting this site in the late afternoon; the sun angles just right, spearing through the water and turning the blue maomao into living stained glass as they swirl through the archway. It’s an easy dive, maxing out around 15 metres, so you can really take your time drifting through the arch. Look for the massive schools of demoiselles too, they add another layer of movement to the already busy scene. Keep an eye out for inquisitive snapper poking their heads from crevices and the occasional kingfish cruising by. It’s not about finding rare critters here, it’s about that sheer, overwhelming volume of life and the play of light. This site is pure magic for photographers and anyone who just wants to lose themselves in a massive fish aggregation.

    Safety Notes

    Drift dive - carry a surface marker buoy (SMB) and stay with your group. Brief the current direction before entry.

    Today05:4518:3212h 47m daylightGolden hour 17:58

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    Conditions

    Ocean conditions, forecast and tides for Blue MaoMao Arch

    Blue MaoMao Arch Ocean Conditions

    Monthly averages for Blue MaoMao Arch, sourced from Open-Meteo marine data + Copernicus Marine (EU) - nearest station: Open-Meteo marine grid (-35.84, 174.61) (14km away)

    ExcellentGreatGoodFairPoor★Best monthsThis month

    October Averages

    Sea Temperature

    16°C

    60°F · Range: 14.8–17.1°C

    Current Speed

    11.4 cm/s

    Direction: SE (142.1°)

    Chlorophyll-a

    0.388 mg/m³

    Moderate productivity

    Salinity

    35.44 PSU

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

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