yeah NE'ly is not the greatest direction for Adelaide.
North Haven looks off shore, Murray Mouth is a bit tricky with dredging going on downwind from the launch area. I tried Point Sturt last time but that wasn't great either.
Maybe just save your energy till the weekend, looks like it's is going to be a nice S-SW'ly both Sat and Sun.
Whyalla doesn't work in a NE'er, the other side of the gulf or a couple of spots on the YP. Port Augusta has a good beach that works very well in a good breeze.