End of September is near the end of our season so yes there is a small chance, at the moment it's been very windy for here for a good week or so but will drop off early next week, a bit of luck it should cycle back while you're here. October is normally no wind but then we have had epic days that month, just keep an eye on forecast and if lugging gear not a problem you'd be mad to leave at home but hey no promises

There are a few local windsurfers in Port.
If you can do a visit to Green Island out of Cairns, they have good hire gear, do it if wind around !!!
Kirgo, January is the middle of our off season so little chance of wind, best for trips to the reef.
Don't worry about crocs, they're around but never been a problem for windsurfers or tea baggers.