whilst the weather is pretty ok most of the year in Australia, i kind of don't skate in summer - it's too hot. as others said, it does rain a lot too. where i am it has rained almost all year so far.
beyond that, there really aren't that many spots - the architecture of australia as a whole is pretty gross. plenty of skateparks i guess...
we have a bunch of great skaters - many more of late, but also a hell of a lot of mediocre to bad sponsored/"pro" skaters.