Dozens of homes and public assets, including a home ground of the St George Illawarra Dragons, are at risk from rising sea levels and inundation along the Illawarra coastline, according to a management plan drawn up by the Wollongong City Council.

The council's coastal zone management plan, part of which was gazetted by the Berejiklian government on Friday, identified Thirroul beach as being particularly exposed, with as many as 71 properties vulnerable.

Thirroul beach, looking south towards Wollongong, faces climate change threats, the council says. Credit:Chris Duczynski / Malibu Media

City mayor Gordon Bradbery said the council had engaged extensive studies based on a projected sea-level rise of 0.4 metres by 2050 and 0.9 metres by 2100.

The region also faced more intense rainfall events producing flooding run-off from the Illawarra escarpment, a range that comes within about half a kilometre of the beach at its closest.