Great Barrier Reef, Australia

    Cod Hole

    Best months: Feb–Mar

    Why dive here

    With 154+ marine species recorded in the area - including hammerhead sharks, sea turtles, tiger sharks and napoleon wrasse - Cod Hole offers some of Great Barrier Reef's richest diving. Water ranges 24-30°C, warmest January, February, March.

    Best timeFeb–Mar
    WetsuitNo wetsuit needed, or a rash guard
    Marine lifeHammerhead Sharks, Sea Turtles, Tiger Sharks and Napoleon Wrasse · 154+ species recorded
    Water24-30°C · warmest January, February, March
    StandoutExceptional marine biodiversity

    Cod Hole is one of those places you hear about before you ever dip a fin in the water, and we’re happy to report it lives up to the hype. It’s the giant potato cod, of course. We’re talking individual fish the size of small humans, gliding slowly past, often so close you could reach out and touch them (please don't). They’re curious, these big fellas, accustomed to divers, and they certainly make for some incredible photos. We love dropping in early, just as the sun starts to properly warm the water, to see them cruise out from under ledges. Beyond the cod, which are the main event, the reef itself here is healthy, plenty of hard corals, and we’ve often spotted Maori wrasse poking around. You’ll also get your usual reef suspects: big schools of fusiliers, sleek unicornfish darting about, and the occasional triggerfish eyeing you up. It’s a pretty easy dive, generally mild currents, making it a great spot for almost any diver keen to get up close with some truly massive fish. Just expect a few other boats to be there; it’s popular for a reason.

    Safety Notes

    Strong currents typical this month (avg 30 cm/s). Good buoyancy control essential.

    Today05:5418:1612h 21m daylightGolden hour 17:47

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    Conditions

    Ocean conditions, forecast and tides for Cod Hole

    Cod Hole Ocean Conditions

    Monthly averages for Cod Hole, sourced from Open-Meteo marine data + Copernicus Marine (EU) - nearest station: Open-Meteo marine grid (-15.65, 145.72) (5km away)

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    October Averages

    Sea Temperature

    26°C

    80°F · Range: 24.5–29°C

    Current Speed

    30.07 cm/s

    Direction: S (183.8°)

    Chlorophyll-a

    0.057 mg/m³

    Very clear (oligotrophic)

    Salinity

    35.08 PSU

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

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