The 2008–09 Supersport Series was the 13th running of the Supersport Series, the premier first-class competition in South Africa, and seventh since the introduction of franchise teams. Matches were played over four days, with each team playing each other twice, home and away, in a round robin format. The series started on 2 October 2008 and was played through until 2 April 2009. Nashua Titans emerged as champions for a third Supersport Series title.