In the distant past, yes, but there is little trace of it.

When the aboriginals first crossed into Sahul (modern day Australia and PNG) some 50,000 years ago, they absolutely would have required boats and seafaring skills. At several points in the journey it would not have been possible to see land in any direction, and would have required to overcome strong sea currents in the Lombok Strait. Consider that they needed to transport a minimum viable population of men, women, and children and you gain some appreciation of the skill that would have been involved. Notably Australia was never colonised by any other hominid.

The archaeological record indicates that they rapidly spread across the continent, and did not maintain that seafaring culture. When the Bass Strait was formed 8,000 years ago, the aboriginal population in Tasmania was isolated from the mainland.

Of aboriginal groups in coastal areas, use of maritime technologies is inconsistent. In the Whitsundays groups developed complex fish hook and harpoon technologies to exploit marine resources, while no such technologies were developed by coastal groups in the Kimberly. For reasons still debated, the aforementioned Tasmanian population ceased harvesting marine resources entirely.