It's getting warm. Running at Castaway is still easily doable, but you can feel the humidity. Also the trade winds in the east Caribbean are starting up, so on your steam back you may find that there isn't much wind because you are cruising at the same speed as the winds, so it can be rather warm on deck without the breeze. We had an enjoyable time though and would travel that time of year again, but not July-Sep if at all possible.