This invention relates a removable seat for watercraft 10 of the type having a hull or underside 13 and a deck 14, and wherein the deck is connected to the hull by side portions or rails 15, and said deck includes retaining means in the form of one or more recesses 20 formed in or attached to the deck. The seat includes a seat base 112 and a backrest 111, and anchoring means 130 connected to structural means supporting said backrest, said anchoring means extending generally away from a lower portion of said backrest and a rear portion of said seat base, and wherein said anchoring means is locatable within a respective one of the retaining means 20. The seat is retained in an operative attitude by first releasable securing means connected to an upper part of said backrest and connectable to a location on the deck or the rails generally forward of the seat, and second releasable securing means connected to an upper portion of said backrest and connectable to a location on the deck or the rails generally rearward of said seat.