A while-in use weatherproof cover for an electrical box that includes a faceplate, a base plate and a perimetrical side wall. The base plate has an opening adapted to receive an electrical device and one or more apertures for securing the cover to the device and/or electrical box. The perimeter side wall is flexible and extends from the face plate to the base plate so that the faceplate, the base plate and the side wall define an interior. The faceplate has an opening fitted with a door that is operated by compressing the side wall. The door is movable between an open position, which allows access to the interior, and a closed position, which restricts access to the interior.