A cover for a hot tub comprises at least one deck that includes a rigid frame surrounded by a foam material covered on a top side and at side edges thereof with a layer of plywood coated with an elastomeric paint. A bottom side of each deck is covered with a first water impervious web. A skirt made from a second water impervious web is fixed proximate to at least one of the side edges of each deck and extends down to cover at least a portion of a peripheral wall of the hot tub when the cover is fixed over the hot tub. In one embodiment, a plurality of foam beams, each mutually separated and including a plurality of notches, convey heat from the hot tub through the deck to melt snow or ice formed on the top side of each deck.
