The word caste is actually a corrupted Portuguese word. The more useful term for sociological groupings is Jati.. Jati as used in South Asia is a very close fit to the definition of people group..
Water temperatures in the Virgin Islands do not change greatly from summer to winter, however the 4 or 5 degree change is noticeable to those acclimated to consistently warm tropical weather. In the summer months the water temperature is about 83 degrees and in the winter about 79 degrees.
On average, there are 223 sunny days per year in Yulee, Florida. The July high is around 91 degrees. The January low is 43. Sperling's comfort index for Yulee is a 78 out of 100, where a higher score indicates a more comfortable year-around climate. The US average for the comfort index is 54.