I use a combination of these three websites:
http://www.skippysky.com.au/Australia/
http://7timer.y234.cn/V3/product.php...=-33.90&ac=sfc
http://ozforecast.com.au/cgi-bin/wea...ford.NSW&radar
Then I wet my finger, stick it in the wind in the backyard and make up my mind if I'm going to setup or not.