It was fine for most of the day with a nice on-shore breeze. We had a heavy rain shower at about 4pm that lasted about 20 minutes. We watched the rain arriving from out at sea and sheltered under a beer tent. It was good fun, everyone crowded in together.
Those who didn't mind getting wet just stayed out and enjoyed the warm rain, including the kite surfer shown below. He was going for hours and was pretty good, even doing a couple of jumps for me as he went past.