Agree with NordRoi. We only just got back from our Maui trip where we spent 2 and a bit weeks windsurfing at Kanaha. June was perfect for wind, very little swelll. Everyday we sailed, 15 non stop in total for me mostly on 4.7's and 4.2's, twice on 5.2's but a little lighter am in general. I'd recommend upwind of the main Kanaha beach for learners, there's a few little sheltered (but gusty at times) beaches. They have a school there also. I have a thread going in the Vic forums with more pics of Kanaha sailing but here's one of the area looking upwind.