The Southern Basketball League (SBL) provides an avenue for high-level competition for young developing players, players at their pinnacle, and players who have stepped down from elite competition. The competition runs from May to August each year and is open to Basketball Queensland affiliated associations in south-east Queensland.
SBL is a strong and competitive league in its own right, and also serves as a key launchpad for young players looking to move into higher levels of basketball. Northside Wizards enters teams into the League each year for men and women.  Since 2016 Northside Wizards have entered two men’s teams into the League to cater for the large numbers of male players that are interested in participating at the senior representative level.
2016 results:
NWB Men’s 1 team undefeated League Champions
NWB Women’s team continued onto the semi-finals, losing to the eventual Grand Final winners.
2017 results:
NWB Men’s 1 team League runners-up
NWB Women’s team League runners-up
NWB Men’s 2 finished in 15th place
2018 results:
NWB Men’s 1 team League Champions
NWB Women’s team League runners-up
NWB Men’s 2 finished in 16th place