We are a tropical rainforest island - we can have rain anytime. Dec is the beginning of dry season, much dryer than summer, but still will have some passing showers or perhaps a half day of rain. It's what keeps the island so beautiful and lush!! Impossible to predict whether ext Dec will be dryer than this past one or not. Just know that it can rain at any time and is usually passing in nature. Rarely do you "lose" a whole day - and it is still in the 80s when it is raining!
Wind at C-Bay can range from light breeze to some strong wind that can occasionally blow over an empty cup or untended napkin. It is never a cold wind - we are so far south, it's always a warm wind. At night, during the dry season, you may need a light sweater or pashmina or jacket as the temp will be in the mid-high 70s at night, but the wind will make it seem a bit cooler. Not cold by any means, but with the almost inevitable sunburns, it will feel a bit chilled!