The council says the water quality in the pool has been affected by a coastal algae bloom in the area.

The pool closure comes after WaterNSW warned beachgoers not to make contact with water discoloured by a marine algal bloom along the coast.

Tests have identified it as Trichodesmium erythraeum, a species not considered toxic but with potential to cause skin and eye irritation.​

Reports of the algal bloom, which currently appears as a brownish discolouration throughout the water and can be mistaken as an oil slick, have been received along the Sydney coast from Palm Beach to the Illawarra.

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In later life stages, the species may be visible as a pinkish discolouration in the water.

The general health impacts of marine or estuarine species was largely unknown, WaterNSW said in a statement, and caution should be exercised where blooms occur.

NSW Health said: “People should avoid swimming or wading in discoloured water affected by the algae. People should also avoid contact with any algal material if it is washed up onto beaches.”

Marine and estuarine blooms will often move with the wind and tides,which means the bloom may present at different locations along the NSW coast.

Trichodesmium erythraeum occur in tropical and temperate environments and can move down the coast via the East Australian Current.

Authorities will continue to monitor the bloom.

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