Minor flooding is occurring at Wilcannia, and water levels have risen all week.
Flood waters are expected to reach moderate levels in Wilcannia over the weekend.
The main flood peak along the Darling River has now passed Bourke.
As water flows downstream, moderate flooding is expected in Wilcannia and may continue until late July.
River levels at Wilcannia rose by one centimetre each day over the past seven days.
Last week, the river levels were 9.57 metres, and the levels reached 9.69 metres yesterday.
The river may reach near 9.80 metres in mid-July, surpassing the moderate flood level mark of 9.70 metres.
The State Emergency Service NSW (SES) advised that Tilpa Road (roads SR1 and MR68A) and the Wilcannia to Menindee Road are impacted by floodwater.
Minor flooding is also already occurring at Menindee.
WaterNSW plans to release water to maintain the current river levels.
The planned release was decided in consultation with the SES and the relevant communities.
The releases are keeping water levels steady at 8.91 metres.
Water levels are expected to remain around nine metres until late July.
Pooncarrie can expect minor flood water levels this week.
River levels have been rising by one centimetre each day, and if this continues, levels should reach the minor flood mark of 6.80 metres by the weekend.
The river had reached 6.76 metres yesterday.
SES advises farmers and landholders to relocate livestock, pumps and chemicals to higher ground.