A portable folding seat has a fabric seat supported in an open position by support rods and a rigid canister. In an open position, the canister functions as a pedestal for the seat and is removably affixed to a mounting surface. The folding seat may be folded into a retracted position such that the fabric seat is completely enclosed within the canister. A removable cap is provided to close the top opening of the canister when the folding boat seat is in the retracted position.