An SES spokesman said about 12.15pm two people became stuck inside their vehicle with two dogs in Toolamba, near Shepparton.

It's believed the pair had been camping over the weekend and awoke to find they were surrounded by floodwater, near the Goulburn River.

The spokesman said they were rescued by boat at 1.30pm and were safe and sound.

He said it was a timely reminder for people in flood-prone areas to avoid driving through floodwaters.

Meanwhile, the SES were bracing for the worst in the small north-western town of Charlton, which straddles the Avoca River.

The river peaked at 7.55 metre on Saturday afternoon, just below the 7.9 metre level experienced in the town's worst flood in living memory six years ago.

But by 11am on Sunday the SES was pleased to report the Avoca's levels had dropped, and the Charlton township was no longer a major flood risk.

"The level is expected to drop below the major flood level of 7 metres by Sunday afternoon," an SES spokesman said.

Despite news reports that 80 residents had to be evacuated from Charlton, the spokesman said there were actually no reports of above floor flooding and no one was evacuated.

In Donald the Richardson River was predicted to peak on Sunday evening, but the SES said there would not be any major flooding.

Three properties were thought to have been under threat in Panmure, but the town's Mount Emu Creek peaked on Saturday night and there were no reports of flooding.

The water levels at Panmure were beginning to drop on Sunday afternoon.

Allanford's major flood warning was also downgraded, the Hopkins River peaked on Sunday morning and there were no reports of above flood flooding, by 11am that river was also receding.

On Sunday afternoon Horsham was bracing for the potential of flooding as the Wimmera River had peaked and was continuing to rise.

"The Wimmera River at Horsham is currently at 3.28 metres and rising," the SES warning said. "The Wimmera River is likely to reach the major flood level (3.60m) Sunday evening."

By Monday morning the river peaked near 3.7 metres, with the potential closure of more roads, bridges and flooded farmland.

The SES has received 1300 calls for assistance since last Sunday and three rescues were performed over the weekend.

Holidaymakers can now access part of the Great Ocean Road, which was closed for four days after landslides and falling rocks and trees.

Communities that have already been inundated by floodwaters could be hit again, with more rainfall predicted across the state this week.

Part of the famous Great Ocean Road, between Eastern View and Lorne, was reopened about 5pm on Saturday, but the road remains closed between Lorne and Skenes Creek.

"There is no local access along this stretch. Motorists can also access Lorne via Deans Marsh-Lorne Road. Princes Highway is an alternative route," a VicRoads spokesman said.

The State Emergency Services worked with VicRoads to reopen the section "after extensive clearing and repair of damage caused by landslides during the past week", a SES spokesman said.

Motorists heading to the area should take care, and note the 40km/h speed limits that are in place.

Due to structural damage to the road, the section from Lorne to Skenes Creek may remain closed in the coming days.

"A watch and act is still in place, there's still some unstable sections on there that haven't slid yet," the SES spokesman said. "VicRoads still have a fair bit of work to get the road restored."

About 250 roads remained closed on Sunday morning, following floods across Victoria.

On Saturday the state government announced a range of disaster assistance for 22 flood-affected parts of Victoria.

The SES said the Avoca River is likely to have peaked around 7.55 metres on Saturday afternoon, in the small town of Charlton, which was "on edge" on Saturday.

"The water is moving down stream slowly and is likely to remain at this height for at least the next 24 hours," the spokesman said.

"The work that SES and CFA crews have done with local communities to sandbag and prepare properties has helped avoid impacts to home and assets in Charlton and at 2pm on Saturday there had been no reports of homes being inundated.

"These crews are still in place to support the community if required."

Charlton has been inundated by rainfall. In the first 17 days of September it received 109.2 millimetres. About 80 homes were door-knocked by the SES and the main street in town was sand-bagged on Friday.

A fourth town meeting will be held in Charlton on Monday morning to discuss the flooding, but the SES spokesman said there were fears for predicted rain on Tuesday.

Major flood warnings also remain for the Loddon, Wimmera-Avon, Hopkins, Ovens and Murray-Riverina river catchments.

Community meetings to discuss the floods will also be held on Monday morning in towns including Donald, Kerang, Quambatook, Bridgewater and Carisbrook.

Bureau of Meteorology forecaster Peter Newham said a cold front from the west would hit Victoria on Tuesday and Wednesday, bringing isolated showers to parts of flooded west Victoria.

He said it was not yet known where will be hit with the most rain on Tuesday, but some areas in the west of the state could receive up to 20 millimetres.

Scattered showers are predicted for around the state on Sunday and patchy showers for Monday.

Mr Newham said it was difficult to predict when Victoria would have another dry day as another cold front would hit the state next weekend.

In a video on Twitter, Victoria's emergency management commissioner, Craig Lapsley,​ said it was "important to remember that our rivers are full".

"Those communities who have experienced floodwater are now in clean-up mode, some are planning for it to ... happen to them in the next number of days," he said.

"On top of that we could have further rain in the coming week that will see further flooding in some rivers that aren't even flooding now.

"We are looking at floods across September."

Victorian flood facts:

• One death
• 1300 calls for help to the SES over seven days
• 250 roads closed
• 150 landslides and rockfalls on the Great Ocean Road
• 20 flood rescues
• 25 flood warnings across the state

For emergency assistance contact the SES on 132 500.

- With Shepparton News.