Abstract: A water ski including a buoyant fore section and an elongated hollow, fluid aft chamber in fluid communication with rear ports in the rear end of the ski and air ports in the top surface of the fore section of the ski whereby the aft section of the ski is flooded when the ski is relatively stationary in the water to cause said ski to assume an upright position in the water and which chamber is rapidly purged of water when said ski is in forward motion to assume a balanced, substantially horizontal skiing position on the water.