Abstract: Window drain comprises, in general, a base having a horizontally extending lower surface and a sloping downwardly and outwardly upper surface. To the base are connected: a front flange, an upstanding rear rib, an end flange at each end, window supports and spacers attached on the front flange. In one embodiment, the window drain is made for a window of a specific width. In another embodiment, the window drain, is versatile so it can be used for windows of different widths. In a third embodiment, the window drain can be made, in situ, for different window widths.