Have a charter for mid-January. Should be able to avoid Christmas winds. Crowds have gone home after New Year's. Lower charter rates than December or February. A little less daylight and water temp is a degree or two less are the biggest negatives.
For folks that live above the 45th parallel, the seasonal change in daylight in the BVI really is negligible. What IS really significant, and bears remembering, is there is no twilight to speak of at 18 degrees latitude, so when that sun goes below the horizon, it is going to get dark VERY quickly. Here in the NorthEast there is generally an hour or more before the sky goes dark, and often significant afterglow from sunset. Un Uh in the BVI, dark as the inside of your pocket in about 10 minutes, and that is true year round.
That is crucial to plans for ashore, be they happy ARR or dinner. Bright flashlight or LED headlamp for the dinghy, and a way to easily recognize your charter boat in a mooring field. Charter companies seriously want their boats on the hook or a mooring by a certain time. That boat's actual OWNER doesn't want a call from his charter broker telling him his boat went on the reef at White Bay or North Sound, or trying to make Anegada at 7 PM.
