Kurnell is good in a westerly until it swings to the south west then you start to get a wind shadow for the first 50 meters or so however if you launch from the boat ramp and sail up near the point this problem pretty much goes away.
When it turns a bit more southerly La peruse probably has a better angle as the wind is more on shore.
Once it swings past south west then dolls point and sandringham both open up pretty well.
see below: (green shows sailable direction)