THE Tweed River is expected to breach its bank in Murwillumbah at 5pm with more than 130mm of rain falling in the last 24 hours.

The Bureau of Meteorology has issued a minor flood warning for Murwillumbah with the river expected to peak below the minor flood level of three metres tonight.

Forecasters are still unsure exactly how severe the flooding will be as there is still uncertainty over when the rain will ease.

The Gold Coast hinterland area has also received a drenching with hourly falls of up to 57mm recorded at Hotham Creek in the Pimpama and Coomera area.

River systems all across the mid north coast of NSW are also on flood warnings.

Senior meteorologist at the Weather Channel Tom Saunders said the border region was right in the middle of a major rain event plaguing eastern Australia.

"You guys are right in the middle of it," Mr Saunders said.

"The heavy rain will probably continue until at least Sunday maybe Monday.

"Beyond Monday we can't forecast yet when the rain will stop, we may get that information tomorrow or the next day."

Police have cautioned drivers to take their time and avoid flooded roads.

The rainy weather coincides with the return of the school year in Queensland meaning drivers need to be extra vigilant for children using the road as cyclists and pedestrians.

Acting Chief Superintendent Andy Morrow of the Queensland State Traffic Support Branch said motorists need to remember cars don't handle the same way in the wet.

"Braking distances increase and tyres can lose grip," Mr Morrow said.

"Visibility is reduced due to rain and road-spray and driving becomes more demanding on the drivers attention.

"Temporary road closure signs will be erected as and when roads become flooded, but with the speed and which some roads become submerged, the absence of a sign does not mean it is safe to cross.

"If the road is flooded, don't cross it.

"The risk is simply not worth it."

The Bureau of Meteorology is expected to release another update this afternoon.

The SES has warned people not to walk, drive or ride in flood water and be careful of water over low lying causeways. Farmers are advised to watch their creeks and dams closely and move livestock to higher ground as necessary.

For emergency assistance call the SES on 132 500.

For life threatening emergencies call 000 immediately.