Labor promised to return it to a seven-day service to help it ease pressure on Wollongong's overburdened emergency department, and added Saturday opening hours mid-last year.
Heathcote MP Maryanne Stuart said having the centre open all week would be welcomed.
"This is an important enhancement to health services for our community - it gives people a genuine alternative outside of a busy ED, when they have difficulty getting a GP appointment, or when their GP is closed, such as on a weekend," she said.
The centre will now be open from 8am to 8pm Monday to Friday and 8am to 4:30pm on Saturday and Sunday.
It provides treatment for minor injuries and illnesses, such as sprains and strains, or minor burns and lacerations, and patients who attend on the weekend will be able to access the usual weekday services, including radiology.
