Cam Mcleod said..
Wolf,Green Island off the coast from Cairns has great wind at that time of year,small to medium sized waves & great flat water for blasting .The latest starboard & severne gear is available for hire.
The surrounds are amazing-rainforest backdrop/amazing reef -definitely worth checking out
info@greenislandwindsurfhire.com
I second this. It's an amazing place to sail. Can rent all the gear you want straight off the beach so no need to bring any equipment anywhere.