Marengo Reefs

Moderate risk: Strong currents and undertows

Sudden changes in weather can create strong currents and undertows when snorkelling, especially near the reef edge.

Moderate risk: Large unexpected waves

Swell can produce large unexpected waves on the rock platforms and reef, posing a risk of being swept off.

Moderate risk: Aggressive Australian Fur Seals

Seals on Henty Island can be aggressive if approached. Do not walk over exposed reef to approach them and keep a respectful distance in the water.

Moderate risk: Strong tidal currents

Strong currents and undertows run through the channel between the islands and around the reef, particularly on outgoing tides.

Moderate risk: Sudden weather changes

Conditions on this exposed coastline can shift rapidly, with unexpected large waves and swell sweeping over rock platforms.

Moderate risk: Large unexpected waves on rock platforms

Swell can send large unexpected waves washing over the intertidal rock platforms. Slippery rocks and ledges pose a fall risk.

Moderate risk: Swell and sudden weather changes

This exposed south-east facing site can change quickly; rough seas and large unexpected waves make conditions dangerous.

Moderate risk: Unexpected large waves

Large unexpected waves can sweep across rock platforms, posing a risk to snorkellers and rockpool explorers.

Low risk: Slippery rock platforms

Intertidal reef rocks can be very slippery — wear shoes with good grip when walking at Hayley Point or the inner reef.

Low risk: Sharp marine life & hidden creatures

Watch where you put your hands on the reef to avoid potentially dangerous creatures hiding in crevices.

Low risk: Hazardous marine creatures

Potentially dangerous creatures may be hidden in crevices and under ledges. Watch where you place hands at all times.

Low risk: Sharp reef and marine creatures

Rockpools, gutters and ledges hide sharp shellfish and potentially dangerous creatures. Watch where you place hands and feet.

Low risk: Protective Australian Fur Seals

Seals can be aggressive if approached; access onto the outer island is prohibited.

Low risk: Exposed reef at low tide

Walking across the exposed reef at low tide to access the inner reef requires sturdy footwear and caution to avoid injury.