2035 said..
I've never sailed Canton... is there somewhere better in a southerly that's within reasonable distance from Maroubra???
Yes and you don't need a weed fin: go to George's river, launch from the sailing club close to the bridge, probably there will be other windsurfers there. It will be pretty choppy, but you are safe, the wind will always carry you back, just make sure not to jibe too close to the bridge, if you lose it and are not quick to start again the tide might carry you on the other side and then it's impossible to come back. My track of shame below