The season is prettty much the same as Perth I believe, however the wind is not normally as strong or consistent and is generally SE not SW.
It is definitely a bit fickle and it is often on down there when it's troughed out up here and vice versa.
I went down for a week a couple of weeks back and by Wednesday night I was nearly ready to pack up and head for the West Coast but got a bit of wind and a couple of sessions in on the Thursday so hung around and had one of the best days ever on the Friday. Surf in the morning, stapless session with the 12 in some big clean waves midday, downwinder strapped on the 9 in the arvo (again with some good swell), then a late arvy session lit on the 6.
Cheers for the downwinder Andrew it was awesome

, did you end up with any decent footage?
Bottom line is it's a long way to go for just a couple of days and yes there is quite a possibility of missing out but when it's on it's gold.