SIS Sport is a weekly sporting competition in which St Francis Xavier competes against other independent schools within the region. This competition takes place on Thursday afternoons for junior students (Year 7 and 8) and senior students (Year 11 and 12) and Friday afternoons for intermediate students (Year 9 and 10).
Sports available to students include football, netball, basketball, softball, volleyball, soccer, table tennis, among others with sports lasting a full term. Games are played at both home and away venues, giving students the opportunity to travel to other schools to compete.