Great Barrier Reef, Australia

    John Brewer 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 - John Brewer 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

    John Brewer Reef is what we call a reliable friend – always good for a dive, especially if you’re keen on seeing some of the Great Barrier Reef’s bigger characters up close. It’s home to a permanent pontoon, which means easy access and a stable base for the day. Drop in anywhere along the reef wall and you’ll quickly find yourself amongst robust coral gardens, punctuated by the kind of healthy plate and brain corals that really thrive in these mid-shelf conditions. We’ve had some fantastic encounters here. There’s usually a resident Maori Wrasse or two, often curious and happy to hang around. Look for the Blacktip Reef Sharks patrolling the drop-off, their silhouettes cutting through the water. Our favourite memory from John Brewer has to be watching a pair of Bleeker's Parrotfish methodically munching on coral, their powerful jaws audibly scraping away. The sheer density of Scaly Pullers and Blue-banded Pualu schooling just above the reef is impressive, a shimmering curtain of silver and blue. It’s an excellent spot for divers who appreciate easy logistics and consistent marine life, without having to venture too far offshore. If you're staying in Townsville, it’s probably your best bet for a proper GBR experience. We’d suggest getting in early, before the day-trippers from the pontoon start to spread out, to really soak up the peaceful morning reef.

    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 John Brewer Reef

    John Brewer Reef Ocean Conditions

    Monthly averages for John Brewer 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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