One of the most sought after weather routers for this area is Chris Parker of Caribbean Weather @ 4.045 mHz USB
SSB starting at ~0730 hrs. Many boats will be traveling this route during the fall and spring and if you dont have a
SSB you can listen-in on a portable HF receiver with external antenna.
Also
PassageWeather - Sailing Weather - Marine Weather Forecasts for Sailors and Adventurers & NOAA ocean prediction center:
Ocean Prediction Center