Known as the Gospers Mountain fire, the blaze has been burning through bushland since it was ignited during a dry lightning storm on October 26.

Overnight on Wednesday, the 10,728 hectare fire blaze was whipped up by strong winds, breaching planned containment lines and began burning to the east in steep terrain near Gospers Creek.

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"This area of the fire will be attacked using aircraft, where winds allow this to be effective," NSW Rural Fire Service Chifley/Lithgow Team operational officer Gary Hansen said.

"This section of the fire is currently 15 kilometre to the west of the village of Mellong.

"Residents and visitors to the areas along Putty Road, including Mellong and Colo Heights, will experience smoke in the area today due to predicted winds from the west."

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Mr Hansen said in recent days remote area firefighting crews from the National Parks and Wildlife Service have extinguished most of the hundreds of hot spots along the perimeter of the fire.

The bushfire is still listed as 'being controlled' with people in the area urged to monitor conditions and stay up-to-date with the bush fire situation.

Check and follow your Bushfire Survival Plan. If you do not have a plan, decide what you will do if the situation changes. Leaving early is your safest option.

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