A sun cover for use with a boat tower having an elevated tow point. The cover includes a frame having a forward portion and a rear portion located adjacent to the forward portion, with at least a portion of the rear portion being spaced above or below the forward portion, defining a gap defined above or below a trailing portion of the forward portion and a leading portion of the rear portion. The frame is mounted to the tower and oriented relative to the tower so that the tow point is accessible via the gap such that a tow rope connected to the tow point extends rearwardly from the tow point via the gap and the cover does not interfere with a tow rope attached to the tow point during use of the boat to pull a person being towed by the boat using the tow rope.