Parts of Australia drenched by an eastern deluge are expected to be hit by more rain as floodwaters threaten to cut off a coastal town.

Eastern Victoria and southern NSW were bracing for more rain overnight Thursday after more than 150 millimetres fell in 24 hours in some areas.

Kameruka Estate near Bega, on the NSW south coast, had 200 millimetres of rain in 24 hours as of Thursday night.

Over the Victorian border, the east Gippsland town of Mallacoota – which had been cut off by a landslide on Thursday – had 112 millimetres.

The Bureau of Meteorology warned a low-pressure system would start moving further away from the coastline from Friday but rain would continue to fall on waterlogged areas into the weekend.

Rain was expected to hit soaked parts of Victoria for the next day or two, with some areas of the state’s east expected to get falls of 200 millimetres.

There were several flood warnings in Victoria as of Thursday night, with major alerts for the Thomson, Genoa, Buchan, Macalister and Bemm rivers.

The Bemm River was expected to peak by Friday afternoon. If it did flood, access to the community would be cut, an SES spokesman said.

There were also moderate flood warnings for the Cann River and the Snowy River downstream of McKillops Bridge.

A severe weather warning was in effect for heavy rainfall and damaging winds for parts of East Gippsland, as well as Victoria’s north-east, west and South Gippsland forecast districts as of Thursday.

There were also advice-level flood warnings for NSW, with some south-eastern parts of the state expected to have had up to 300 millimetres of rain by the end of Friday.

A severe weather warning for heavy rainfall for people in parts of the south coast and Snowy Mountains remained in place on Thursday night before conditions were expected to ease.

The bureau warned flooding could persist after rain subsided in NSW and Victoria.

-AAP