5-15m
    Goat Island & Hauraki Gulf, New Zealand
    Sugar Loaf Island

    Seal Rock / Waikaranga

    Best months: Jan–Apr

    Protected Area

    Sugar Loaf Island

    Why dive here

    With 72+ marine species recorded in the area - including blue sharks, dolphins, hammerhead sharks, humpback whales and seahorses - Seal Rock / Waikaranga 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 · max 5-15m
    StandoutRich in charismatic marine life

    We’ve always had a soft spot for Seal Rock, also known as Waikaranga. It’s a site that often gets overlooked for the more dramatic outer gulf spots, but it delivers consistent, easy diving. You’ll find yourself weaving through a patchwork of rocky reef, usually within the 10-15 metre range, which is perfect for longer bottom times. Our favourite time to dive here is on a calm, sunny day when the light penetrates through the kelp forest, illuminating schools of snapper and blue cod that seem utterly unfazed by divers. Keep an eye out for inquisitive seals, particularly during late spring and summer. We’ve had a few playful encounters here, a real treat. Visibility averages around 8 metres, which isn't Caribbean-clear, but it’s more than enough to appreciate the details of the reef and the surprisingly diverse smaller critters tucked into crevices. This site is genuinely lovely for newer divers looking for some relaxed exploration, but even experienced eyes will find plenty to enjoy amongst the swaying kelp and resident fish. It’s a great spot to simply slow down and observe.

    Typical Seal Rock / Waikaranga Dive Profile

    5mSafety Stop0m5m max~60 min estimated bottom time

    Illustrative profile based on site depth and type. Actual dive profiles vary - always follow your dive computer and training.

    Today05:4518:3812h 53m daylightGolden hour 18:03

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    Conditions

    Ocean conditions, forecast and tides for Seal Rock / Waikaranga

    Seal Rock / Waikaranga Ocean Conditions

    Monthly averages for Seal Rock / Waikaranga, 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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