5-20m
    Great Barrier Reef, Australia

    Joan 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 - Joan 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 · max 5-20m
    StandoutExceptional marine biodiversity

    Joan Reef is one of those spots where you really get that classic Great Barrier Reef feeling. We love dropping in here, especially on a calm morning. The reef itself is just brimming with activity, and it’s a great place to slow down and really observe. You’ll be surrounded by schools of Blue Green Chromis darting in and out of the corals, a constant shimmering cloud. Keep an eye out for the Flasher Scorpionfish, they're absolute masters of camouflage, blending right into the rubble – you’ll need good eyes to spot them, but it’s worth the effort. We've found the best time to dive Joan Reef is when the tide is coming in gently; it brings in a bit more visibility and stirs up less sediment. We often see Golden Butterflyfish paired up, gracefully picking their way across the reef, and the Orange-lined Triggerfish always seem to be patrolling their territories. It’s a comfortable dive, nothing too strenuous, which makes it perfect for photographers or anyone who just wants to soak it all in. If you're looking for a relaxed dive with consistent reef life, Joan Reef delivers.

    Typical Joan 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.

    Safety Notes

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

    Today06:0018:2012h 21m daylightGolden hour 17:52

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    Conditions

    Ocean conditions, forecast and tides for Joan Reef

    Joan Reef Ocean Conditions

    Monthly averages for Joan Reef, sourced from Open-Meteo marine data + Copernicus Marine (EU) - nearest station: Open-Meteo marine grid (-15.65, 145.72) (5km away)

    ExcellentGreatGoodFairPoor★Best monthsThis month

    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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