Facilities include three buildings housing classrooms, science and computer labs, a library, art and drama facilities, a cafeteria, and a gymnasium. The campus includes softball, baseball, soccer, and football fields. The school seeks faculty who possess proven expertise in their subject areas and who have a genuine concern for students within the classrooms and beyond. Teachers are available for extra help. Student Body Sea Island Academy enrolls approximately 200 students with a student-teacher ratio of eight to one.
Class sizes range from six to twenty students, with an average of twelve per class.
Students come from families who are long-term residents of the Charleston area and from families who have moved to the area from many parts of the country. Sea Island Academy seeks economic and ethnic diversity in its student body. Twenty-two credits are needed for graduation. The school offers a variety of clubs and activities. Considerable responsibility is vested in the Student Government and class officers.