Heron Island
Why dive here
With 113+ marine species recorded in the area - including dugongs, grey reef sharks, humpback whales, sea turtles and tiger sharks - Heron Island offers some of Coral Sea's richest reef diving. Water ranges 25-30°C, warmest January, February, March.
Heron Island isn't about deep dives or big pelagics. Instead, we love it for its quiet, shallow beauty, a proper coral cay experience right on the Southern Great Barrier Reef. The maximum depth is a gentle 16 metres, making it perfect for longer bottom times and really soaking in the details. On a good day, visibility pushes past 15 metres, letting the light filter down through the water, illuminating the vibrant Transverse and Galaxea corals. Keep an eye out for Blue-spotted Stingrays resting on the sand, or the quirky Double-ended Pipefish trying to blend into the rubble. We’ve found the best time to dive is early morning, before the day boats arrive, when you might just have a school of Longfin Bannerfish all to yourself. It’s a site that rewards patience, a place to slow down and appreciate the smaller wonders.
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Conditions
Ocean conditions, forecast and tides for Heron Island
Heron Island Ocean Conditions
Monthly averages for Heron Island, sourced from Open-Meteo marine data + Copernicus Marine (EU) - nearest station: Open-Meteo marine grid (-16.5, 148) (0km away)
October Averages
Sea Temperature
26°C
79°F · Range: 25.4–29°C
Current Speed
10.3 cm/s
Direction: SE (119.1°)
Salinity
35.38 PSU
Based on 4 years of monitoring data · Data sources: Open-Meteo marine data + Copernicus Marine (EU)
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