Great Barrier Reef, Australia

    Ribbon Number One 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 - Ribbon Number One 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

    Ribbon Number One. Now, this is a spot we’ve spent some serious time at, and for good reason. It’s not just another patch of coral; this place has a personality. We love dropping in on the northern end, where the reef edge slopes gently before plunging into deeper water. You get a real feel for the scale of the Great Barrier Reef here. Keep an eye out for the Pacific Half-and-half Chromis, those little flashes of blue and yellow are everywhere, a constant, shimmering cloud that almost tickles your mask. The corals are something else, too – big heads of Wrinkle Coral and Cauliflower Coral, and those sprawling Staghorn thickets. It feels ancient. We've often seen Black Marlin cruising the deeper edge, a dark silhouette against the blue, which is always a thrill. It's a dive that rewards slow exploration, letting the currents carry you past walls dotted with Orange-lined Triggerfish. This one really suits divers who appreciate a healthy, expansive reef system over specific megafauna encounters, though the marlin are a nice bonus. Go in the morning; the light really brings out the colours of the corals.

    Safety Notes

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

    Today05:5318:1512h 22m daylightGolden hour 17:47

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    Conditions

    Ocean conditions, forecast and tides for Ribbon Number One Reef

    Ribbon Number One Reef Ocean Conditions

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

    ExcellentGreatGoodFairPoor★Best monthsThis month

    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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