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.
In November, the more inland you go, the colder it will get. You can expect an average 17-9 ÂºC in Porto and more or less 15-6 ÂºC in the near interior. It usually rains a lot, but it is also a very unpredictable month. Sometimes we have what we call VerÃ£o de SÃ£o Martinho - St. Martin's summer, which basically puts temperatures well above the 20's.