Great Barrier Reef, Australia

    Carter Reef

    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 - Carter Reef offers some of Great Barrier Reef's richest reef 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
    CharacterReef dive
    StandoutExceptional marine biodiversity

    Carter Reef is one of those places where the Great Barrier Reef really shows off. We’ve drifted along its eastern wall more times than we can count, and it always delivers. The corals here, especially the large porcelain coral colonies, form incredible platforms that give way to drop-offs filled with schooling fusiliers – so many of them sometimes the light struggles to get through. Keep an eye out for the floral wrasse darting around these formations; their colours just pop against the blue. We love it for its sheer scale and the way larger pelagics often cruise past, particularly black marlin during certain seasons. If you're lucky, you might even spot a tawny nurse shark tucked away in an overhang. Our favourite time to dive Carter is early morning, just as the sun hits the reef face, bringing out the vibrant hues of the honeycomb corals and attracting the busy goldspeckled shrimpgobies to their burrow entrances. Visibility is usually good, but we’d suggest going with a liveaboard that knows the currents well, as they can pick up, making for an exciting drift. This spot is perfect for divers who appreciate big reef structures and the possibility of seeing something truly spectacular pass by.

    Safety Notes

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

    Today05:5518:1612h 21m daylightGolden hour 17:47

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    Conditions

    Ocean conditions, forecast and tides for Carter Reef

    Carter Reef Ocean Conditions

    Monthly averages for Carter Reef, 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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