The La Salle Swimming and Diving program is one of the most successful in the area. It has maintained over the years a tradition of excellence resulting from student-athletes and coaches dedicated to the sport, their team, and their school. La Salle has won the Pennsylvania Interscholastic Athletic Association (PIAA) AAA State Championship five years in a row. The team was also named the 2016 National High School Championship Team.

In addition to the state and national recognition, the team has also won 29 consecutive Philadelphia Catholic League (PCL) Championships and nine straight PIAA District 12 Championships since joining in 2009.