Quite clearly legit answers can't be given in regards to Adelaide surf....it's a joke but does happen occasionally. SUP's are the best thing to happen to us due to the small size of swell.
Keep your eye on
http://www.swellnet.com/reports/australia/south-australia/mid-coast and check out the pics to give you an idea of what we face.
Luckily, Victor Harbour is less than an hours drive South and always swell but the wind is the killer.
Lately it's been basically non-existent swell with stiff SE winds. Down wind runs on the north beaches have been plentiful, surf not so much.
I live on the mid and there is always something to do if you have a few different board lengths.
Check out Onkaparinga River mouth via the below link and click on Google Images. The beauty speaks for itself. The cliffs can offer some protection from the SE winds when there is swell the crowds on a tiny peak it basically rules out the SUPs.
lmgtfy.com/?q=onkaparing+river+mouthSharks....well yeah, they are everywhere. We seem to be having less trouble here than other states of late. Most surf spots on the Mid are very shallow which may assist keep numbers down...I did say MAY....