The weather in the Caribbean, especially southern, does not change much throughout the year. Should be sunny and very warm, with possible tropical showers. Usually refreshing. It seems you are looking at three different Princess cruises. Have you cruised at all in the past? And are you aware that cruises to Martinique and Guadeloupe require passports? I recommend the one that visits curaçao, as the ABC islands are more desert than lush tropical and will add variety to the cruise. EM