Hydroplaning occurs when there is standing water on a roadway. Up to 30 mph, most tires will channel water away from the tire similar to the way a windshield wiper cleans the windshield. As your speed increases, however, the tires will not be able to channel the water as well. Your tires may start to lose contact with the road and ride over the water like a set of water skis. In a typical passenger car, partial hydroplaning can start at speeds as low as 30 mph.