Great Barrier Reef, Australia

    Day 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 - Day 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

    Day Reef is one of those spots that just delivers. We’ve always found it to be a consistently good dive, reliable for that classic Great Barrier Reef feel without the crowds you sometimes get closer to Cairns. Drop in, and you’re immediately enveloped by the sheer density of the coral. We're talking massive bommies rising from the seabed, punctuated by delicate branching corals that host entire communities of fish. On our last trip, we spent a good chunk of time just watching the adorned dwarfgobies darting in and out of the honeycomb coral – they’re so tiny, you really have to slow down. Look a bit wider and you’ll spot the humphead unicornfish patrolling the reef edge, and the parrotfish, particularly the rivulated and batavian varieties, are always busy scraping algae. The black-saddled leatherjackets are often curious, coming in for a closer look. Visibility here can be stellar, often pushing 25 metres on a good day, especially around the slack tide. We'd suggest aiming for late morning or early afternoon dives when the sun really brings out the colours of the corals. It’s a comfortable dive, suitable for most experience levels, as long as you're comfortable with boat diving. We love it for its sheer visual abundance and the feeling of truly being in the heart of the Great Barrier Reef.

    Safety Notes

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

    Today05:5518:1612h 21m daylightGolden hour 17:48

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    Conditions

    Ocean conditions, forecast and tides for Day Reef

    Day Reef Ocean Conditions

    Monthly averages for Day Reef, 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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