Enrollment begins next Monday for the 2017 summer and fall semesters at Southwestern Oklahoma State University in Weatherford. Enrollment begins next Monday for juniors, seniors, athletes, student employees and students not currently enrolled at SWOSU for the spring 2017 semester. Sophomore students can begin to enroll February 27th. Freshmen students can begin to enroll March 6th. However, freshmen under age 21 are required to attend and enroll through a new student orientation session.