Currently we are in a string of westerlies so most people are going to either lake budgewoi (north of sydney) or lake illawarra (south of sydney) for flat water blasting. a few still sail in botany at Kurnel or La peruse in a westerly.
As we go into summer and the NE sea breaze starts to kick in you will see a lot more sailing at Kyemagh (next to airport) in botany bay.
Pic here i drew a few eyars ago - the green shows what wind directions work at each spot . red is off shore and patchy
Cheers