Flynn Reef - Three Sisters
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 - Flynn Reef - Three Sisters offers some of Great Barrier Reef's richest reef diving. Water ranges 24-30°C, warmest January, February, March.
Three Sisters at Flynn Reef is a solid drift dive when the current is running, otherwise, it’s a calm coral garden. We often see whitetip reef sharks resting under ledges and plenty of schooling fusiliers out in the blue. It’s a good spot for newer divers looking for a relaxed experience or for photographers who want to take their time.
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 Flynn Reef - Three Sisters
Flynn Reef - Three Sisters Ocean Conditions
Monthly averages for Flynn Reef - Three Sisters, sourced from Open-Meteo marine data + Copernicus Marine (EU) - nearest station: Open-Meteo marine grid (-15.65, 145.72) (5km away)
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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