Abstract: A wind propelled watercraft system is provided including a floating disk for supporting a user on a body of water. Also included is a sail assembly for driving the user on the floating disk by way of wind. The floating disk has an inwardly-facing groove for receiving the user's toes and is provided with a generally part-spherical bottom face. The sails extend between the arms and the body of the user, whereby the user can spill wind by lowering the arms.