THE flooding in northern NSW is expected to ease over the weekend as 12,000 people remain isolated tonight.

State Emergency Services (SES) spokesman Dave Webber said isolated regions include Tweed, Woodburn, Clarence-Nambucca and Thora.

"The focus at the moment is around isolations on the northeast coast of NSW," Mr Webber told AAP.

"There's about 12,000 people isolated across a range of river systems."

A further 8000 people in Iluka and Yamba were not isolated but there have been road closures in the area due to the high tides, he said.

"Council are monitoring that situation closely."

Since Monday, the SES has had just under 1000 calls for help with 200 calls today.

There have been 47 flood rescues since Monday with seven on Friday.

"We're expecting further rainfall for the weekend but there's not going to be enough to cause any further rises in river levels," Mr Webber said.

"We're looking at an easing of conditions over the next 24 to 48 hours."

Two army helicopters have returned to their base in Queensland after helping out with flood relief operations in the state.

The Black Hawks, which flew to Lismore on Thursday, have been helping inspect flood affected waterways and evacuated a person from Ewingar, east of Tenterfield.

Acting deputy chief joint operations Commodore Michael Noonan said on Friday the choppers were no longer required.

However, the army remained prepared to help out again if required.