The match will be played tonight, which is a scheduled reserve day.
The ground preparation for the match has been compromised, with the pitch remaining under covers for three days and over 200ml of rain falling since Wednesday this week.
The SA Weather Service has predicted more showers for the remainder of Saturday, with a clearer outlook predicted for Sunday.
"WE have engaged the match officials, teams, groundsman, stakeholders and the SA Weather Service, and postponing the match is the best decision to allow for the possibility of a full match in drier conditions. We want to give the teams and spectators a memorable final," League Commissioner Graeme Smith said. (UNI)