A wave making method positions a shallow draft vessel off-shore form a shoreline of a sea in a position whereby one side of the vessel is in parallel to the shoreline. A pump is used for pumping seawater into a tank interior to the vessel. When the vessel is filled, the water is lifted to a rim of a side of the tank nearest to the shoreline to thereby dump the water in the tank over a side of the vessel. The dumped water is directed outwardly from the vessel and falls onto a submerged curved platform attached to the vessel and which extends outwardly therefrom. The platform creates a wave that moves away from the one side of the vessel toward the shoreline and is suitable for surfing.