Great Barrier Reef, Australia

    Agincourt Reef No. 1 - Trigger Fish City

    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 - Agincourt Reef No. 1 - Trigger Fish City 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

    Trigger Fish City. The name says it all, doesn’t it? We’ve dived Agincourt a fair few times, and this particular site is always a lively one, especially if you’re into the feistier side of reef life. Expect to feel like you’ve wandered into a busy street market, but underwater, with Triggerfish everywhere. These aren’t just any triggers, mind you, we’re talking Picasso triggers, titan triggers, often circling you with that unmistakable watchful eye. The coral here, particularly the pagoda and closed brain corals, creates some fantastic swim-throughs and overhangs. We always find ourselves spotting the intricate frills of lettuce coral tucked into crevices, a great contrast to the bolder parrotfish, like the Bullethead and Dusky, chomping away nearby. Look out for the Pacific Half-and-half Chromis darting amongst the coral – they add a lovely splash of colour. While the official depth is unknown, we’ve found it’s a comfortable multi-level dive, perfect for just exploring the reef structure rather than chasing depth. Our favourite time to hit this spot is mid-morning, just after the initial boat rush, when the triggers seem most active and the light filters through beautifully. It’s a great spot for photographers who enjoy capturing dynamic behaviour.

    Safety Notes

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

    Today05:5318:1512h 23m daylightGolden hour 17:47

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    Conditions

    Ocean conditions, forecast and tides for Agincourt Reef No. 1 - Trigger Fish City

    Agincourt Reef No. 1 - Trigger Fish City Ocean Conditions

    Monthly averages for Agincourt Reef No. 1 - Trigger Fish City, 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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