Learning to glide / soar in winter

I am located in Sydney / Australia and wonder what the pros/cons are to do a
glider course in our winter instead of our summer. Weather here is generally
sub-tropic and I guess comparable with South Africa or maybe Spain or
Southern USA. Looks like a much nicer season to be out and about than the 40
degree heat ( and the flies) we get here in midsummer. Spoke to a guy in a
Sydney glider club and he recons winter is just as good as summer for
gliding here.

Any opinions appreciated -- Oscar