For ninth through twelfth grades, Sea Girt's public school students attend Manasquan High School, as part of a sending/receiving relationship with the Manasquan Public Schools. Manasquan High School also serves students from Avon-by-the-Sea, Belmar, Brielle, Lake Como, Spring Lake, Spring Lake Heights who attend Manasquan High School as part of sending/receiving relationships with their respective districts. As of the 2018–19 school year, the high school had an enrollment of 969 students and 72.9 classroom teachers (on an FTE basis), for a student–teacher ratio of 13.3:1.