5-20m
    Coral Sea, Australia
    Bassett Basin

    Dangerous Reef

    Best months: Mar–Jul

    Protected Area

    Bassett Basin

    Why dive here

    With 113+ marine species recorded in the area - including dugongs, grey reef sharks, humpback whales, sea turtles and tiger sharks - Dangerous Reef offers some of Coral Sea's richest reef diving. Water ranges 25-30°C, warmest January, February, March.

    Best timeMar–Jul
    WetsuitA 3mm shorty or thin full wetsuit
    Marine lifeDugongs, Grey Reef Sharks, Humpback Whales, Sea Turtles and Tiger Sharks · 113+ species recorded
    Water25-30°C · warmest January, February, March
    CharacterReef dive · max 5-20m
    StandoutRich in charismatic marine life

    Dangerous Reef, despite its rather dramatic name, is more thrilling than truly dangerous, though you do need to respect its currents. We’ve found the eastern side is often the sweet spot, particularly when the tide is coming in, bringing with it a clearer push of water. It’s a proper Coral Sea experience, feeling remote and untouched. The sheer wall drops away into the blue, and we’ve spent hours just hanging there, watching schools of giant trevally cruise past, often shadowed by a tawny nurse shark or two. What makes it special for us is that sense of wildness. You’ll be surrounded by fusiliers and damselfish, but the real show is the pelagics. We’ve spotted massive schools of eye-spot butterflyfish here, something you don't always see in such numbers elsewhere. Keep an eye out for Portuguese man o' war on the surface if you’re doing a drift; they’re pretty, but you don’t want to get tangled. This site really suits divers comfortable with some chop and who appreciate feeling like they're exploring somewhere truly off the beaten path.

    Typical Dangerous Reef 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.

    Today05:3618:0512h 28m daylightGolden hour 17:35

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    Conditions

    Ocean conditions, forecast and tides for Dangerous Reef

    Dangerous Reef Ocean Conditions

    Monthly averages for Dangerous Reef, sourced from Open-Meteo marine data + Copernicus Marine (EU) - nearest station: Open-Meteo marine grid (-16.5, 148) (0km away)

    ExcellentGreatGoodFairPoor★Best monthsThis month

    October Averages

    Sea Temperature

    26°C

    79°F · Range: 25.4–29°C

    Current Speed

    10.3 cm/s

    Direction: SE (119.1°)

    Salinity

    35.38 PSU

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

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