Stamford competes in two major leagues. SEASAC (Southeast Asia Student Activities Conference) is a 16-school regional league where students travel to represent Stamford in tournaments across Southeast Asia. ACSIS (Athletic Conference of Singapore International Schools) is the local league, fielding teams from age 8U through 19U.
Seasonal sports across both leagues include Football, Basketball, Tennis, Cross Country, Badminton, Golf, Rugby, Touch Rugby, Volleyball, Swimming, Gymnastics, Softball and Track. In 2024, SAIS hosted SEASAC Volleyball where the Lions Boys were promoted into Division 1.
Additional recognition pathways:
- University sports recruitment support – student-athletes receive guidance on highlight reels, coach outreach, and scholarship applications
- Recognition through Athletic Council leadership and sports awards ceremonies












