I would think it would be better to wait until your area is having its spring. Can you get bees locally? Or is waiting not a possibility because you are having to order from a different climate?
The bees are locally, same clima. I'm worry it is to late, even if we are in subtropical clima. Our "winter" is really different, but the problem will be the queen. Shorter days => minus eggs!
Forraging is not a big problem, in march will come the eucaliptus flower.