Hi Dave,
If you like wavesailing, then I suggest that when it is anything southerly you should go to either Toowoon Bay or Ocean Beach, Umina. Just be prepared to be outnumbered by the kiters. Both spots work well in S'lys. Ocean Beach is onshore and Toowoon is cross-shore.
If it is NE'ers you want, then you can try North Entrance, Forresters Beach or even Wamberal, but it does get BIG at Wamberal sometimes. These are all cross-onshore. Usually a few dedicated wavesailors around either venue and we are a friendly lot.
Sailing on Brisbane Waters or Tuggerah Lakes usually needs a weed free fin otherwise you will pick up weed too often. More slalom territory there.
See you out one day.