We were there once in early December. It was very windy. Our private beach dinner was disrupted by blowing sand. The sail on our sunfish sailboat broke while we were out and we had to be rescued. Our snorkeling excursion was choppy. At this time of year, the staff will recommend staying to certain sides of the island, sheltered areas for meals, etc.

There are good days and bad days of course. You can still have a nice time but do expect some wind.