CHP Officer Chris Rardin said the teen jumped from the eastern sidewalk just south of the South Tower around 11 a.m. and fell less than 250 feet.
He began swimming to the shore and was assisted by a surfer who happened to be in the water, Rardin said.
The student appeared to be uninjured and was taken to San Francisco General Hospital, Rardin said.
The student was in the company of about 45 students and two teachers, according to a statement issued by the Windsor Unified School District.
The district said the boy climbed out of the water and did not suffer severe injuries.
The district notified the parents of the students who were on the trip, and counselors were available for students and family members.
Rardin said the CHP will investigate the incident.
James Lanaras, Bay City News