A constantly reoccurring topic that one becomes obsessed with at the approach of a holiday!
Because I like diving in clear water I usually like to know I have a couple of days of clear weather in which to plan. If it looks like a few days of rain then it is meals with friends and indoor activities!
The following web links are really useful.
Storm carb for a general satellite picture and comments from people living on the islands
Martinique radar. You can see a snapshot of current rainfall and what is coming up
Great for an hourly forecast and level of rainfall predicted
Hope this helps and happy holidays everyone!