Prime Minister Julia Gillard will today visit fire-ravaged north-western New South Wales as crews continue to battle a blaze that has destroyed 40 homes.

Ms Gillard will head to Coonabarabran to meet with locals and volunteers who have been fighting the blaze, which has burnt out 42,000 hectares in and around the Warrumbungle National Park.

is still in place for the bushfire, and it is still unclear when the more than 100 evacuees will be able to permanently return home.

Firefighters continued building up containment lines overnight ahead of expected warmer weather over the next two days.

Winds are also forecast to pick up, although the Rural Fire Service is not expecting the conditions to be as bad as first thought.

A temperature of 23 degrees Celsius and a wind gust speed of 26 kilometres per hour was recorded at Coonabarabran Airport at 7:35am (AEDT).

RFS spokesman Paul Best says the fire has been slowly burning east in the direction of Coonabarabran and large containment lines are in place.

But the biggest risk is for isolated properties to the east of the fire.

Those evacuated during the bushfire were yesterday allowed home briefly to inspect the damage.

John Shobbrook flew over his property in the ABC's helicopter and says it was tough to see the ashes of his house for the first time.

"It's hard to take, hard to lose a lifetime of memories, we didn't get one document out of the house," he said.

"Within a few minutes you can see there's nothing so that's the way it goes.

"But we're all safe.

"I appreciate the efforts that all the firefighters have put in, I've seen them with tears streaming down their cheeks."