You can't be serious? All I can say is Australian summer beats the hell out of midwest/northeast dead winter any day!

How about learning to sail? I tried this about a couple of weeks ago- and it's a lot of fun. You have to be somewhat fit though because you gettin' a workout too :)

Tried the outdoor clubs/bars, like the ones on Parramatta Road? I was in Sydney during the New Year celebrations- and look, there is nothing like sipping martini and dancing away barefoot on a hot steamy night......now where else on earth can you dance barefoot on  new year's eve, or in Jan or Feb for that matter?

This place is a heaven for the outdoorsey type- I've done some boating, water skiing, fishing, body surfing, etc. in Lakes Entrance, which is about a couple of hours drive from Melbourne. I am sure you'd enjoy these...there's got to be lakes nearby Sydney somewhere...

How about golf :) ? Nothing like a tee-off on a 18-hole golf course near one of the beaches...Rosebud, Mornington Peninsula will do! Ok- so you don't like golf...

How about Go-Karting? Like the movie 'Days of Thunder'? Well, now you'd be able to experience it...the karts only go up to 35km/hr though...but when you are just 2 inches off the ground it feels more like 200km/hr...trust me you are going to love it...just try it out...

Whatever you do...please do NOT sit home and watch a movie....and let the Australian summer pass you by :))

Cheers!