For the whole wheather business. well, its not all hot all the time. everywhere has a winter!
Tassy is generally coldest, then Vic, NSW, SA?, QLD, and then WA and NT. QLD is really hunmid and stormy in a lot of area's, NT is REALLY hot, Vic and Tassy are too cold, in my opinion (still lovely in summer, though), SA... i don't know much about it. and WA is just huge, i think the more southern part and generally around Perth is sort of hot but average? not sure... but i've been there loads and i love it (especially Rockingham and Rottnest Island ) seriously, WA's winter is Vic's spring. literally! another thing for the whole shark thing, once you get in the water, you're generally having too much fun to think about them and so you forget. The water looks too inviting when you first get there, and when i go to the beach for the first time in ages, i always absoloutely, full on SPRINT into the water (unless its a rocky beach). i hope this helps a bit!
