Crowds of people are walking the Esplanade at Cronulla on Saturday, enjoying the weather and the surfing display in the big waves generated by Ex-Tropical Cyclone Uesi
There was also a carnival atmosphere on Friday night, with hundreds of people enjoying the spectacle from Cronulla Park.
Beaches are expected to receive another battering from the big seas.
The Bureau of Meteorology has forecast hazardous surf conditions along the coast and the Police Marine Area Command says people should consider staying out of the water and avoid walking near surf-exposed areas.
Many beaches are expected to be closed.
Cronulla beach suffered severe erosion in last weekend's extreme weather and North Cronulla beach also incurred sand loss.
Three thousand square metres of sea wrack (large proportions of seaweed) is being moved by a bulldozer to the northern end of Cronulla beach, where the erosion occurred.
Sutherland Shire Council expects the weed will act as a buffer against further erosion as it is returned to the ocean by the tide and currents.
The Bureau of Meteorology said Cyclone Uesi had dissipated and become a tropical low as it moves in a southerly direction off the east coast of Australia but was generating large and powerful sea swell that will impact the NSW coast from Friday.
Director of Lifesaving at Surf Life Saving NSW, Joel Wiseman, said surf conditions on the NSW coastline on Friday and across the weekend would be large and dangerous.
"If people don't heed emergency service warnings and put themselves in danger in these extreme conditions, it's possible that lifesavers will not be able to save them," he said.
"With damaging sea swell forecast in many locations, there is a threat of coastal inundation and erosion in low-lying areas.
"Large tidal surges are a possibility in some areas which will exacerbate the damage caused by the extreme weather event last weekend.
"In anticipation of the forecast hazardous surf and high wind conditions, Surf Rescue emergency call-out teams will remain on high alert from today and across the weekend.
Offshore rescue boats based in Sydney, Ballina and Kiama will be on standby to respond to any critical coastal incidents."