mate - fishing is hit and miss. I fish middle harbour and can never be confident that a spot will fire all the time . The best bet is to find some structure and burley up with bread and pillies and fish the tide changes. Also keep an eye out on the gulls and if they are bombing the surface try trolling some lures for the surface fish.
I have come home fishless on several outings , I cant remember when I last caught a good fish from the system , some guys seem to have alot of luck but its like anything you need to know how to read the waterway and just keep trying new spots .
Good luck with it - i have fished that area for over 30 years and still have alot to learn.