Wollongong City Council is monitoring sections of coast ravaged by last week's wild weather, but says beach erosion is less severe compared with previous storms.
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Erosion, also called scarping, was most prominent at Corrimal and Coalcliff beaches, but also evident at Bulli.
"We're asking the community to avoid the fenced-off area of Coalcliff Beach, which suffered quite severe erosion that has seen scarping around the foreshore edges," a council spokeswoman said.
"Council crews will be monitoring this site closely over the coming weeks."
Work has already been carried out to improve safety at Corrimal Beach, including a regrade of the access track.
Thirroul and Austinmer beaches were the focus of crews ahead of Anzac Day services.
Although the surf season wrapped up on Sunday at all beaches except North Wollongong, council has extended the use of its beach raker by one week to help redistribute sand and capture storm debris.
The spokeswoman said the shape of the city's beaches fluctuated throughout the year and council's environment team regularly monitored them for changes.
"Although there has been a substantial amount of sand movement and scarping on some beaches, the erosion has not been as severe as in previous storms such as March 2013 and May 2014, " she said.
In 2013, Wollongong's City Beach largely disappeared into the ocean and left behind a dramatic sheer sand cliff.
Weatherzone meteorologist Tristan Meyers said beaches were "dynamic places" that frequently underwent erosion events.
Mr Meyers said the energy of large waves scraped sand off the beach profile and moved it further out to sea.
"Generally, the sand collects at a certain point further offshore, a point called the 'depth of closure'," Mr Meyers wrote on the Weatherzone website.
"During calm periods, the sand is reworked onshore from the depth of closure."