Great Barrier Reef, Australia
    Michaelmas and Upolu Cays

    Hastings Reef Blue Lagoon

    Best months: Feb–Mar

    Protected Area

    Michaelmas and Upolu Cays

    Why dive here

    With 154+ marine species recorded in the area - including hammerhead sharks, sea turtles, tiger sharks and napoleon wrasse - Hastings Reef Blue Lagoon 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

    Blue Lagoon at Hastings Reef is a proper shallow dive, maxing out around 13 metres. What we really love here is the sheer density of small stuff. It’s not about huge pelagics or dramatic walls, though there is a nice wall feature that drops away from the shallows. Our favourite part has to be the sandy patches, absolutely riddled with sea cucumbers, including leopard and pineapple varieties, just doing their thing. Keep your eyes peeled low, near the sand, and along the coral. We've seen some fantastic decorator crabs camouflaging themselves perfectly, and the nudibranchs are often out and about if you take your time. You’ll spot schools of Yellow Spotted Trevally cruising by, and the cauliflower corals are particularly vibrant. It’s also a solid spot for sunburst and racoon butterflyfish. This site really suits divers who enjoy a slower pace, hunting for the smaller, more elusive creatures. If you’re into macro photography, or just like finding weird and wonderful things tucked into crevices, this is your kind of place.

    Safety Notes

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

    Today05:5218:1512h 23m daylightGolden hour 17:46

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    Conditions

    Ocean conditions, forecast and tides for Hastings Reef Blue Lagoon

    Hastings Reef Blue Lagoon Ocean Conditions

    Monthly averages for Hastings Reef Blue Lagoon, 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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