Hazardous surf and swell conditions are expected along the Illawarra coast on Wednesday.
The Bureau of Meteorology has issued a warning, saying conditions are dangerous for certain activity such as rock fishing, boating and swimming.
The warning is current until midnight.
People are advised to consider staying out of the water and avoiding walking near surf-exposed areas.
Rock fishers should not go to rock platforms exposed to the ocean, and instead seek a sheltered location.
Boaters looking to cross shallow water or ocean bars should reconsider their plans, while those already on the water should ensure they have appropriate safety equipment and wear a life jacket.
They should also log on with their local Marine Rescue base and consider their safety management plan.
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