The weather is warm all year around. Expect temps in the 80s all year, with a rise into the low 90s during parts of August and sometimes September. August-October are the more humid months and also there is more rain. The tropical storms and hurricanes tend to pass the island by, but they still get the side swipe effect of more rain during that period of time. May is also fairly wet. January through April are substantially dryer.

So there is "tourist season" during the winter and spring, although the cruise ships also come year around. Then there is a short rainy season in May, followed by Hurricane Season in the late summer through the fall.