Comrade Rys
I sail northern end of this beach you speak of
I also sail him just this Sunday gone.
You must be waiting for wind to go more south west... in southerly it is very onshore... this make sailing difficult but still much fun as was the case on Sunday with biggish swell running

Stockton end is better in nor east but there is not much reef for breaking of waves... in nor east you much better going round to Nobbys where you will see many sailors and many good waves on reef.
These sailors very friendly, you just ask where to sail through channel in reef so you not smash fin and friendly local tell you right place

Birubi also work well in Nor east though many people not like the cross off shore... slingshot down the line wave ridding !
Me I lurves it and often sail him on my own

For southerly sailing there is spot half way along Stockton beach but you must need 4wd for getting to this spot.
There is little point on beach that you can just see from Birubi on clear day... this spot work very well in southerly... more cross on than rest of beach which is direct onshore when wind is coming from south

A lot of advice from Kremlin, but seeing that it didn't make much sense to this local, I'll have a go:
The southern km or so of Stockton is good in a southerly, you choose a spot depending on the wind angle (SW to SE) and your personal preferences (fully sideshore etc) and the swell size which increases as you get away from the shelter of the wall. A good number of people sailed here in the good old days, but now only the occasional one or two. It's a similar angle to Blacksmiths 30 minutes to the south which is more often sailed.
As for the northern end of Stockton I guess you mean Birubi which is good in a westerly and occasionally sailed in a NE for bearaways as Kremlin said. There's 30kms of uninterrupted sandy beach between Stockton and Birubi. I can't figure what this spot halfway along the beach is. I guess you mean near the Sygna wreck. As far as I know it's a smoothly curving 30kms with no "point" or interruption of any kind. Check Google Earth to see for yourself. Don't check Whereis.com because it shows a bay and point halfway along that is totally fictitious - weird! Perhaps that's what Rys saw on the map he mentioned. But that doesn't explain Kremlins comment, I'd still like to know what that's about.

Me not speak German, but you funny too. Flotsam derives from the French. What's it mean in German?

I might take you up on your offer, this point intrigues me. And yes Google earth may be years old, but it still surprises me that that beach could ever differ so much.