Lifeguards ran into the waters of the Sandy Hook Unit of the Gateway National Recreation Area's Beach B to rescue the trio around 4:30 p.m., according to the National Parks Service.
The boy was pronounced dead at the scene while the two other teens -- both 17, a boy and a girl -- were taken to Monmouth Medical Center in unknown condition.
Click here to follow Daily Voice Ridgefield Park-Hasbrouck Heights and receive free news updates.