We are planning the Christmas Cruise on the Navigator on December 18 with our entire family. The cruise goes to the Western Carribean, Cozumel, etc. My question is the weather: Here in South Florida, it can get chilly at that time of year. Should we be prepared for some cool weather on this trip? If anyone has done this trip at that time of year, I would appreciate some insight. Actually I realize that weather is difficult to predict, so I guess I'm looking for someone's past experience.

Thanks.