Heron Island dive sites (e.g. Coral Gardens, The Gutter, The Canyons)

Moderate risk: Tidal currents

The Gutter and The Canyons are subject to moderate to strong tidal flows that can sweep snorkellers away from the reef. Best snorkelled on slack tide or with a guided tour.

Moderate risk: Marine stingers (jellyfish)

Marine stingers including box jellyfish may be present in warmer months from October to May. Stinger suits are recommended.

Moderate risk: Windward side currents

Strong currents can run along the windward (eastern) side of the island, particularly at Coral Cascades and The Bommie. These currents concentrate pelagic life but can carry snorkellers away from shore.

Moderate risk: Stinging jellyfish

Stinging jellyfish (box jellyfish and Irukandji) may be present in warmer months, November to May.

Low risk: Marine stingers (box jellyfish)

Marine stingers (box jellyfish and Irukandji) are present in the Southern Great Barrier Reef waters, particularly during the warmer months (October to May).

Low risk: Boat access only (dive sites)

Access to the reef requires a boat transfer from the island or a guided tour. The boat ride can be rough in choppy conditions.

Low risk: Tidal currents in reef channels

Strong tidal currents can sweep through the reef channels, especially during outgoing tides. Snorkelers should be aware of changing tide times.

Low risk: Sun exposure

The sun is intense in tropical Queensland; UV exposure is a hazard even on cloudy days.

Low risk: Sharp coral and reef rock

Coral cuts and scrapes from contact with live coral or sharp reef rock are common when snorkeling in shallow reef areas.

Low risk: Sharp coral

Coral formations are sharp and can cause cuts or abrasions if swimmers make contact. Maintain buoyancy and avoid touching the reef.

Low risk: Boat traffic

Boat traffic in the channel between Heron Island and the outer reef bommies. Snorkelers should be aware of surrounding vessels.

Low risk: Turtle nesting season

The island is a major green turtle nesting site. From November to March, nesting turtles traverse the beach at night. Snorkellers must avoid touching or disturbing turtles in the water.

Low risk: Sharp coral at low tide

Shallow coral bommies and reef platforms are encountered immediately upon entering the water. Low tide exposes sharp coral; entering at low tide risks cuts and coral damage.

Low risk: Venomous marine life

Marine stingers including stonefish and cone shells are present on the reef. Snorkellers should avoid touching coral or the sandy bottom.

Low risk: Marine stingers

Marine stingers (box jellyfish and Irukandji) may be present in the warmer months from October to May.

Low risk: Deep water

Some areas of the Blue Pools are deeper (5-10m) and require good snorkel fitness and comfort with depth.