Some of my most memorable sessions were had at Seaford/Carrum, for good

and bad[}:)] reasons
You can't go past the Patterson River Motorboat Club's website for wind & weather charts and a live (and controllable) webcam feed of the beach there. Webcam is useful to look for whitecaps or "a front moving in"

if you don't want to believe the reading. Easy link:
http://www.prmbclub.com.au . Look for 'webcams and weather' in the menu.
Another option if you're not getting wind in Carrum, but St Kilda is blowing is to go halfway to Brighton beach.. I found it more-often-than-not mimics St Kilda.
Can't wait to hit that crystal clear, choppedy chop-chop Carrum water again in January

Rob