THE PILOT LANDED THE AIRPLANE PARALLEL TO THE SWELLS AND AS IT SLOWED DOWN, IT WEATHERVANED INTO THE WIND. THE AIRPLANE'S NOSE PITCHED UP AND ACCORDING TO THE PILOT, A GUST OF WIND HIT THE AIRPLANE. THE LEFT WING, THE DOWNWIND WING, STRUCK THE WATER. THE SWELLS WERE ESTIMATED TO BE 1 TO 2 FEET AND THE WIND WAS FROM THE SOUTHEAST AT 10 KNOTS WITH GUSTS TO 20 KNOTS.