A watercraft has a deck connected to a hull, the deck having a wall, and a reboarding platform connected to at least one of the hull and the deck. The watercraft has a convertible seat assembly wherein a first panel is connected to the wall, and a second panel is movably connected to at least one of the wall, the reboarding platform and the first panel. The convertible seat assembly has a first configuration wherein the second panel is disposed on a reboarding platform side of the wall, and a second configuration wherein the first panel forms a generally vertical seat back and the second panel forms a generally horizontal seat bottom. A convertible seat assembly for a watercraft is also disclosed.