Climate The climate as a whole on the islands is classed as dry tropical with an average temperature ranging between 21C to 31C with water temperatures between 22C and 27C. There are 2 seasons, a dry season between November and July and a comparatively moderate humid season between August and October. Daily sunshine averages 6 to 7 hours between August and October and 10 to 12 hours for the rest of the year. Wind speed averages 13 knots between November and July, dropping to 9 knots in the summer and rainfall averages to around 10 inches, mostly falling over the higher ground. There is a significant contrast in climate between the mountainous regions which are cooler and wetter, to the warm, dry climate on the coast. Sal and Boa Vista are particularly dry.