Current Session Info

2017-3rd Grade Clinic

Registration opens tomorrow

6 week basketball clinic for boys and girls in the 3rd grade. The clinic will introduce players to the game of basketball and teach basic skills.

Sessions will take place at Seaford Manor School and are tentatively scheduled to begin on Tuesday March 7, 2017.

Getting Help

If you need help with the registration process, click here to submit a request, or contact:

For assistance with Third Grade Basketball Clinic,

For more information, visit the St William CYO website at


Welcome to St. William the Abbot CYO online registration system.

Registration for the third Grade Basketball clinic will run from Saturday February 25 through Sunday March 5. This is a six week clinic that is open to girls and boys in the third grade. It will cover basic basketball skills. The clinic will be held at Seaford Manor School on Tuesday nights starting on March 7 at 7:30 PM.

Initial registration for 2017 Girls Volleyball was held from October 16th through October 30th.  We still have limited openings for 5th grade intramurals. The waiting list is open for 6th-7th grade intramurals.

See for more information.


Registration for the St. William CYO Sharks swim team was held between Sept 26 and Oct 7 and is now closed, and our roster is full.  Further information for the Sharks swim team is available on our website,