Sydney & New South Wales, Australia
    Cabbage Tree Bay

    Wreck of HMAS Australia

    Best months: Jan–Mar

    Protected Area

    Cabbage Tree Bay

    Why dive here

    With 199+ marine species recorded in the area - including blue sharks, bull sharks, dolphins, dugongs and great white sharks - Wreck of HMAS Australia offers some of Sydney & New South Wales's richest wreck diving. Water ranges 18-23°C, warmest January, February, March.

    Best timeJan–Mar
    WetsuitA 3mm full wetsuit
    Marine lifeBlue Sharks, Bull Sharks, Dolphins, Dugongs and Great White Sharks · 199+ species recorded
    Water18-23°C · warmest January, February, March
    CharacterWreck dive
    StandoutExceptional marine biodiversity

    The HMAS Australia wreck isn’t your typical accessible dive, but for those who manage the trip, it’s a real deep-water reward. We’re talking about a massive, proud battlecruiser sitting upright on the seabed, a proper ghost ship. Dropping down, you start to make out the sheer scale of it, and we love how the structure is still so intact, almost as if it’s waiting for its crew. Visibility can be a real crapshoot out here, but on a good day, the sight of those huge guns and the bridge structure emerging from the blue is incredible. You'll often find schooling kingfish circling the superstructure, and we’ve seen some massive Queensland groper lurking in the shadows of the engine room access points. Exploring the deck, you're looking for remnants of its past, and the sheer amount of history sinking into the sand is palpable. This one’s definitely for experienced wreck divers comfortable with deep profiles and a bit of planning. Our top tip? Go with a charter that knows the currents and can time the slack water just right. It makes all the difference.

    Safety Notes

    Wreck site - avoid penetration without wreck diving certification. Watch for sharp metal and entanglement hazards.

    Today05:1818:0312h 45m daylightGolden hour 17:30

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    Conditions

    Ocean conditions, forecast and tides for Wreck of HMAS Australia

    Wreck of HMAS Australia Ocean Conditions

    Monthly averages for Wreck of HMAS Australia, sourced from Open-Meteo marine data - nearest station: Open-Meteo marine grid (-33.18, 151.63) (7km away)

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    October Averages

    Sea Temperature

    20°C

    67°F · Range: 18.5–20.7°C

    Air Temperature

    17°C

    63°F

    Wind Speed

    5.95 m/s

    11.6 knots

    Atmospheric Pressure

    1016.2 hPa

    Based on 4 years of monitoring data · Data sources: Open-Meteo marine data

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