What happened
The pilot had recently completed a configuration change on the aircraft (type not specified), replacing the main landing gear wheels with floats. During the takeoff run, which was directed toward the west from a creek entering a large lake, the pilot estimated the wind to be from the northwest at 10 to 12 knots.
Shortly after the aircraft became airborne, a sudden wind gust estimated at 30 knots or more struck the plane. This gust caused the right wing to lift, forcing the airplane to turn toward a line of trees situated along the creek bank. Although the pilot managed to level the wings, the aircraft could not be steered away from the obstacle. The flight ended when the airplane collided with the trees and a small boat located in front of a lakeside residence. There were no injuries reported.