On Tuesday, the MEC for Local Government, Environmental Affairs and Development Planning, Anton Bredell, said in a statement that levels have increased to 21,2%, up from 17,6% at the end of last month.
But he warned that the province remained drought-stricken despite the recent rains.
"There has been a slight increase in the average dam levels but we are still a long way off from breaking this ongoing drought. We hope to be around 75% on average by October with the eye on the coming summer period."
Residents were still being urged to curb water consumption.
"We must ensure that dam levels recover, so when it starts to rain, consumers should not revert back to using water wastefully." Level 4 restrictions remain in place, and all consumers have been urged to use less than 100 litres per person per day in total.