A weekend of wild weather in Australia disrupted everything from the internet to shipping and banking, while pummeling coastal towns and exposing insurance companies to hefty payouts.

A clean-up was under way on Monday after a low pressure system that brought flooding and strong winds combined with high tidal surges along much of the Australian east coast started to ease.

Australian websites including Channel Nine, Foxtel Play and Domino's Pizza went down on Sunday when Amazon Web Service's Sydney zone experienced a two-hour power outage, according to Australian website ITnews.