Be aware- most of the buildings in Australia do not have AC, central heat- or for that matter screens on the windows. This means you will need to purchase a heater, fan and a mosquito net depending on the season you are here.
The weather is glorious most of the time and 95% of days you will not miss AC or central heat- but it only takes one mozzie (Aussie Mosquito) biting your knuckle at 4:00 in the morning to completely ruin your night. Check out Ikea, Target, camping/outdoors stores and Holy Sheet! Tend to have Mozzie nets. Ikea- by far the least expensive at around $12. For heaters and fans- look out for Council Clean Ups, public notices of stuff for sale from other travellers, Variety Stores, Woolworths (Woolies), Coles,or if all else fails- Bing Lee’s or Harvey Norman’s (electronic stores). I got a combined heater/fan at Coles for $29.
The lack of AC is a perfect excuse to throw on a huge set of sunnies and head to the pub. The lack of central heating is a perfect excuse to throw on a jumper (sweater) and head to firplace at the pub…. I think you are on your own with the mozzies- unless you go to the all night dance clubs and sleep during the day… then again- that might not be such a bad idea…