Great Barrier Reef, Australia

    Admiralty Anchorage

    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 - Admiralty Anchorage 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

    Admiralty Anchorage is one of those spots where you really get a feel for the scale of the Great Barrier Reef. We've always found it reliable for a good, solid dive. What strikes you first is the sheer density of the staghorn corals, they just go on and on, forming these huge, intricate structures. You can spend an entire dive just weaving through the channels, spotting the little stuff that calls them home. Our favourite time to drop in is early morning, before the day boats crowd the anchorage. The light hitting the coral is spectacular then, really bringing out the colours. Keep an eye out for the Blackspot Surgeonfish and Angel abu polos darting between the branches, and we’ve often found Southern bluefin tuna cruising the deeper edges. If you have good eyes, look for the tiny Red-streaked Blenny poking its head out of the coral. It’s not a drift dive, so you can take your time, really explore. We think it’s a perfect site for photographers or anyone who just wants to immerse themselves in a classic GBR coral landscape.

    Safety Notes

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

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    Conditions

    Ocean conditions, forecast and tides for Admiralty Anchorage

    Admiralty Anchorage Ocean Conditions

    Monthly averages for Admiralty Anchorage, 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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