I was there up to the 16th of Feb, there was a tropical storm several thousand KM away which was bringing in periodic strong winds and rain. Some days started off sunny and then it rained in the afternoon, on other days it rained periodically. You might find it has all cleared up by the time you get there, but this is summer, so you are bound to have some rain now and again. Luckily for you the North is one of the drier parts of the island. Don't worry too much about the weather, even with rain, you can still have a good time, but don't venture too far out into the sea if there are strong winds and currents.