Thousands of cubic metres of sand have been gouged from Cronulla beaches by big seas on two successive weekends.
Boulders at the northern end of Cronulla beach, which were placed there after previous storms, have been exposed and the Esplanade steps, instead of leading gently to the sand, end in a big drop.
Erosion at the southern end of North Cronulla beach is also severe.
Sutherland Shire Council has placed barriers at both locations, along with signs reading, "Warning - Cliff Edge".
The big waves attracted thousands of visitors to Cronulla on Friday evening through to Sunday, and they were treated to spectacular surfing displays.
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Top surfers were in action at Cape Solander, where a huge surf was running.
Apart from sand erosion, sea wrack - seaweed washed ashore in large quantities - has also been a problem.
A bulldozer was used to push 3000 square metres of sea wrack to the northern end of Cronulla beach from where it was washed back out to the sea by the the receding tide and currents.
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Large quantities have since washed back in again.
The council is still assessing what needs to be done to address the beach erosion and is also counting the cost of the extreme weather on other assets.
A council spokesman said, like many businesses and private properties, a large number of council facilities were damaged.
"More than 50 council operated facilities recorded some level of damage as a result of severe hail and extensive downpours, with impacts ranging from the temporary malfunction of sliding door entry to the Engadine Library, through to power outages and extensive hail and water damage to facilities such as Sutherland Leisure Centre," the spokesman said.
"Council's planning and investment in preventative maintenance programs to regularly clear water quality devices and stormwater pits and a cyclic program of clearing roof gutters on buildings, significantly reduced the damage sustained in this most recent storm event.
"Council staff have been working tirelessly in recent weeks to repair those facilities that have been damaged, with the safety of our community and the continuation of services our priority.
"However, as a significant portion of these remediation works need to be conducted by external contractors, the full cost of these remediation works is yet to be assessed.
"Council thanks all residents for their patience during the short period that some of our community facilities were inaccessible to the public, and for their understanding as we continue to repair those still requiring remediation works."
