Water was 8 C, air 13 C with sunshine. Total of four sailors, the day started with 6.0 conditions, then quickly built to 5.0, then 4.2 Hucker for me. Others used 4.7 wave sails, the Hucker has lots of power. Pro-Tech ATC 260 is too big for the 4.2, especially in the 35 knot gusts.