It depends what cruise you are on. We were on the Wonder at the very beginning of January and Castaway Cay was a bit too cool for me to swim . Nassau was also very rainy and a lot of the excursions were cancelled. BUT if you are going on the Caribbean cruise, it will be much warmer there since it's further south.
GET UP TO A $1000 SHIPBOARD CREDIT AND AN EXCLUSIVE GIFT!
If you make your Disney Cruise Line reservation with Dreams Unlimited Travel you’ll receive these incredible shipboard credits to spend on your cruise!