A low pressure trough off the northern NSW coast will gradually move away to the north and weaken during the next 12 to 24 hours. As this system weakens conditions will gradually improve, according to lifeguards.
Very large ocean waves and swell are occurring along the coast between the Queensland border and Port Hacking, producing very dangerous surf conditions and beach erosion.
Waves are particularly large north of Port Macquarie. Tides will be higher than normal today and are expected to exceed the highest tide level of the year.
Some inundation of low-lying areas is likely to occur on the high tide north of Port Macquarie.
Damaging wind gusts in excess of 90km/h remain possible along the coastal fringe to the north of Wooli this morning.
Flooding, tidal inundation and beach erosion is likely. Water quality is reducing due to the large amount of rainwater flowing into the ocean.
All beaches are closed.
Surf Life Saving NSW and the Australian Lifeguard Service advise that people should:
Leave the water immediately;
Follow any directions issued by lifeguards;
Obey any signage that has been displayed;
Keep small children and pets away from the edge of the water;
Avoid entering the water until it is deemed safe to do so;
Stay well clear of creek and river mouths, storm drains and causeways;
Stay away from rock ledges and shelves; and
Avoid near shore boating, fishing or rock-fishing.
Maximum waves may be more than twice the height forecast.