as I write this a massive thunder storm is about to hit.
we had it at Pt Lincoln impressive storm in middle of summer, even more is that this came from NT somewhere.
You need to post in the SA sections for a better response. Anyway, clockwise order:
Ardrossan: Freeride/wave. Small waves next to public jetty (dretched). 30 knot solid seabreezes. Small window to sail due to beach access. Bad behaviour from locals have kept me away. **** Town 
Port Vincent/ Stansbury: Speed sailing. Stansbury has best sand bar. 20kt mirror smooth water. Small/friendly crew that always welcome visitors. Winds normally 20kt in summer. Sometimes you get a 30 knot SE seabreeze. Weed fin required at certain phases of the tide. Booties are essential anywhere along the east side of YP due to razor fish.
Bottom of the boot: Wave sailing. Never been there. I only go to places with high reliable wind. Ask on the SA windsurfing forum.
Port Hughes/Moonta Bay: Free ride. Water quality is fantastic in summer. Seabreezes pretty good. Northeries in winter are rock solid reliable (25-30kt).
A bit beyond Walleroo is waves, and I won't say anymore 
Port Broughton/Fishies Bay: ****. Don't even bother.
