Abstract: A removable thermal protection seat cover for a personal watercraft has a pair of front mounting straps extending a distance forwardly from a front edge that fasten around the steering column, a pair of rear mounting straps extending a distance rearwardly from a rear edge that fasten around either of the tow hook or a grab handle at the rear of the watercraft, and corner pockets that contain weighting material to increase the weight of the cover at the corners thereof. The seat cover covers the seat from front to back and extends downward along at least a portion of the lateral sides of the raised pedestal beneath the seat to protect the buttocks and legs of the rider from burns due to heating of the seat and pedestal by exposure to hot sun and from heat generated by the enclosed engine compartment.