The new devices will be available through Telstra, Optus, Vodafone and Virgin Mobile.
Pre-orders start today through Optus, Sony Kiosks and Sony Online and select telecommunication partners, October 3 from Virgin Mobile and October 7 from Telstra.
The Xperia Z3 has a 5.2-inch full high definition display, a 20.7-megapixel camera, PlayStation 4 remote play, a two-day battery and the highest waterproof rating of any smartphone.
The Xperia Z3 compact has all of these features but with a smaller 4.6-inch screen.
The Sony Xperia Z3 and the Xperia Z3 Compact will be priced at $849 and $699 respectively.
Sony Mobile also announced the new SmartWatch 3 and the SmartBand Talk will also be available before Christmas through Telstra, Sony Direct and all major retailers.
The original Sony smartband – the SWR10 – has also been reduced to $99 from today.