Got an opportunity to go away for one week in June.

Background:
Live in Melbourne - it's going to be a freaking cold winter, need to get some sun.

Question:
Australia or OS?

Rules:
Beach holiday
Indonesia is out (don't ask)
Gold Coast, Byron Bay (been there too many times, not interested)
No more than a six hour transit - fly/drive.

Nice to have:
Be great to get a few waves
Doesn't have to be warm/hot - but sunshine is good.
Uncrowded/not a big tourist destination.