The Caribbean Islands are some of the most beautiful in the world. Part of the planning involves checking the weather. Hurricane season for the Caribbean is considered June 1st though end of November, with the peak months being August, September and October. Here you will find a few resources that will help take the worry out of this part of your planning.
Links to detailed earthquake and climatology data:

StormCarib.com – Historical Analysis and tracking of more than 1400 storms
Caribbean Hurricane Network – First hand reports from various islands
FindLocalWeather.com - Detailed Climatology information