Sutherland Shire Council has urged beachgoers to take extra care when visiting beaches at Cronulla after they suffered further sand erosion in the past week.
A council spokesman said staff had been "closely monitoring the potential impact on local beaches and taking steps to guard against potential threats to public safety" throughout last week.
He said beachgoers should "take caution", with parents advised that children "should not be permitted to play near areas of significant sand erosion".
The spokesman said Wanda beach had suffered the most significant erosion as a result of last week's high winds, which whipped up huge seas.
"Wanda beach was the worst affected but it was nowhere near as bad as anticipated or as bad as it was at the start of the year," he said.
Thousands of cubic metres of sand were stripped from Cronulla's beaches back in February by big seas over two successive weekends.
Boulders that had been placed at the northern end of Cronulla beach after previous storms were exposed and sand was stripped away from the bottom of steps on The Esplanade, leaving a big drop to the sand below.
Erosion at the southern end of North Cronulla beach was also severe, leading Sutherland Shire Council to erect barriers at both locations along with signs warning of a "cliff edge".
Sand erosion at Cronulla's beaches has been an ongoing and costly issue for the council over many years.
While many say it is part of natural wave action, others blame man-made environmental factors for the damage.