The Illawarra was drenched with heavy rain on Wednesday and showers are expected to continue on Thursday and into the weekend.
Rain and a thunderstorm are forecast for the morning and afternoon of Thursday with a top temperature of 20 degrees Celsius for Wollongong.
There will be light winds but it won't be as bad as Wednesday.
A small reprieve in the rain is expected on Friday.
The Bureau of Meteorology predicts a slight chance of a shower in the early morning and maximum temperature of 21 degrees Celsius.
However the rain will return for the weekend.
There is a high chance of showers and a thunderstorm in the afternoon and evening on Saturday with a top temperature of 22 degrees Celsius in Wollongong.
Rain will continue on Sunday with a chance of a thunderstorm in the morning.
The temperature will be 19 degrees Celsius.
The highest recorded rainfall on Wednesday was at Bellambi with 33 millimetres.
The total rainfall for Tuesday and before 9am on Wednesday was 56 millimetres at Bellambi and 36 millimetres at Albion Park.
Illawarra State Emergency Service crews had 27 requests for assistance on Tuesday and Wednesday, mostly for leaking roofs and fallen trees and branches.
There were 66 calls for assistance across the Illawarra, Southern Highlands and South Coast with more than 600 across the state.
There was localised flooding in Saville Road, Dapto on Tuesday night but no other flooding incidents had been reported at 8pm on Wednesday.
The Illawarra Police Rescue Squad helped bring a 14-year-old girl to safety at Long Point Lookout.
She was injured and needed extraction from the bottom of the valley at Shoalhaven River.
A helicopter was not able to assist members of NSW SES Wingecarribee Unit, so NSW Ambulance along with the Police Rescue Squad's carried her back to the top.
People are reminded to keep clear of creeks and storm drains, should never drive, ride or walk through floodwater and be aware of fallen trees and debris on the road.