About 550 people have been isolated or evacuated and a school has been closed due to flooding in the NSW town of Forbes.

While the state can expect clear skies and settled weather this weekend, emergency warnings have been issued for nine areas in Forbes and Wagga Wagga.

Another 29 watch and act alerts are current statewide.

The Lachlan River at Forbes was a centimetre below the major flood peak of 10.55 metres on Friday morning, with 250 premises estimated to be affected by floodwaters.

Between 500 and 600 people were isolated or had to be evacuated overnight in the Central West town, home to about 8000, the SES said.

While water is not expected to enter classrooms, Forbes Public School has been ordered to close.

Meanwhile, people in three areas of the Riverina city of Wagga Wagga including Moorong have been ordered to leave due to dangerous flooding.

“Fortunately, the Murrumbidgee River peaked on Thursday and we’re starting to see the floodwaters decline in those areas,” SES spokesman Andrew Edmunds told AAP.

Overnight, the SES received 264 calls for assistance with five being for flood rescues, including of livestock.

Wee Waa and Warren are again isolated, with authorities working to resupply the cotton towns.

“If people do need assistance, please call 132 500,” Mr Edmunds said.

“For those towns, it’s a prolonged campaign, sadly.”

Heavy rain has severely affected Victoria this week, leading to evacuations in Melbourne, Benalla and Bendigo.

Significant falls in northern Victoria will affect the Murray River, leading to possible minor flooding in Albury and other NSW towns on the southern border.

Although clear skies are on the horizon, the fortnight ahead will be soggy with above-median rainfall (greater than 80 per cent chance) on the cards for large parts of the eastern two-thirds of Australia.