We are embarking on the 6 night Wonder repo from Galveston to San Juan in Jan 4. The weather looks to be chilly in Galveston when we leave (50F) and nice (70/80F) by the time we get to our first port (St Thomas) on Day 5. For the 3 sea days prior to St Thomas, are we likely to have sunny and warm or cold? I can't figure out how to get a weather prediction for the sea days. Thanks!!