The wet weather affecting the Illawarra is expected to begin moving away from the region late on Friday afternoon.
But don't start planning for a weekend outdoors, with scattered showers likely to linger on Saturday and Sunday.
Bureau of Meteorology meteorologist Tim Constable said a slow-moving inland trough combining with cooler air in the upper atmosphere had caused the recent heavy rainfall.
"Those two systems are driving the cloudy rainy conditions in the east of the state at the moment."
Parts of the Illawarra recorded an average month's worth of rainfall in a single day, including Foxground, near Berry, which received 232 millimetres on Tuesday and 399 millimetres for the week to Thursday.
Wollongong received 334 millimetres for the week to Thursday.
Maximum temperatures have been close to average, while minimum temperatures have been higher than average, Mr Constable said.
Next week, temperatures between 19 and 27 degrees are forecast for Wollongong.
This week's wet weather caused chaos around the region, including the closure of Bulli High School due to flood damage. The school announced it would continue to operate in a limited capacity on Friday, and would reopen to all year levels on Monday.
On Friday, years 11 and 12 should report for classes and are asked to bring their own lunch, as the canteen is not operating. Supervision will be available for junior students who must come to school.