As mentioned above Sandgate in anything south of SE is terrible and a true southerly is dangerous, even a good SE you need to go north of the pool for clean wind.
I set up just before 11 at 12th street boatramp and had the entire sangate - brighton beach to myself for a good 3/4 hour. It was coming in SE and I packed up when the wind shifted back to S at about 1:30. Quite a few guys came out from Brighton (I was the one that had to pull safety and rerun lines on the sand after a down loop went horribly wrong

) - the couple guys down at sandgate would have had crap wind.