A boat windshield is described including a transparent pane. A rail is disposed adjacent and secured to one of either the bottom or the top edge of the transparent pane. An opening is defined through the rail. An air intake housing is secured to the front surface of the rail. An air intake opening and passageway are defined in the air intake housing. An air discharge housing is secured to the rear surface of the rail. An air discharge opening and passageway are defined in the rear intake housing. The air intake passageway, the opening through the rail, and the air discharge passageway define an air pathway from the front surface to the rear surface of the rail. The air discharge opening is positioned adjacent to the rear surface of the transparent pane to direct air along the rear surface of the transparent pane upon exiting the air discharge housing.