

Best for beginner divers, 5-20m, boat entry.
Coral Grotto is a reef and cavern site located off Heron Island, Australia. Accessible only by boat, the site features depths between 5 and 20 metres, with an average of 15 metres. Visibility varies significantly from 7 to 30 metres. Divers frequently encounter green sea turtles, spotted eagle rays, and blacktip reef sharks. Other species recorded include hawksbill and loggerhead turtles, giant guitarfish, epaulette sharks, whitetip reef sharks, and lemon sharks. The site is suitable for beginners, though divers must remain aware of strong currents and boat traffic. Guided tours and equipment rentals are available locally. Night diving is permitted at this location.
-23.44230, 151.91480
June through September brings the most reliable visibility and calmer conditions, making it the best window for beginner divers. Stay aware of boat traffic on the surface when ascending, and always do a safety stop before surfacing.
Access to Coral Grotto is via a boat from the jetty on Heron Island. The boat ride to most dive sites is short, typically 10-15 minutes. Heron Island is accessible from Gladstone by ferry, seaplane, or helicopter.
Recorded at this site
Depth
5-20m
Visibility
7-30m
Skill Level
Beginner
Entry
Boat
Boat required
Water Temp
22-28°C
Best Time
Jun, Jul, Aug, Sep
Divers regularly encounter green sea turtles, spotted eagle rays, and blacktip reef sharks. Other species present include hawksbill and loggerhead turtles, giant guitarfish, epaulette sharks, whitetip reef sharks, and lemon sharks.
Yes, Coral Grotto is suitable for beginner divers, particularly during the calmer conditions found between June and September.
The site ranges from 5 to 20 metres in depth, with an average depth of 15 metres.
Coral Grotto requires boat access, as it is located 80 kilometres from the shore.
June, July, August, and September offer the most reliable visibility and calmer conditions.
While the site is primarily a dive location with depths up to 20 metres, the shallower reef areas may be accessible depending on conditions.
Diving at Coral Grotto in Gladstone requires the following certifications: Open Water. Always dive within your training limits.
Yes, equipment rental is available at or near Coral Grotto in Gladstone. Contact local dive operators for specific gear availability and prices.
A 3mm wetsuit is recommended for diving at Coral Grotto in Gladstone. Water temperatures range from 22°C to 28°C.
Visibility at Coral Grotto in Gladstone typically ranges from 7 metres to 30 metres. Conditions vary with weather, tides, and seasons.