The NSW Rural Fire Service (NSW RFS) is urging residents to prepare now for what could be a long and protracted fire season.

Superintendent Lyndon Wieland said with warm and windy conditions becoming more conducive to the spread of fire, people need to be extremely vigilant.

"Conditions during the winter have been unusually dry, resulting in the vegetation and soil moisture levels being extremely low," he said.

"With the onset of warmer weather, this vegetation is now very volatile and ignitions are occurring very easily. People will need to be extremely careful when using fire. If a fire leaves your property, the landholder is liable for any damages."

The Superintendent said the forecast for the 2019/20 bush fire season is for continuing dry conditions, with higher than average temperatures. He said this could see "above normal" fire activity for the western areas of NSW.

From October 1 any person wishing to light a fire in the open will require a fire permit, the only exception being small camp fires and cooking fires.

"A fire permit is required ... to ensure fire is used safely, minimising the danger to you, your property, your neighbours and the community," Supt Wieland said.

Permits are free and can be obtained from your local permit issuing officer or the Orana Fire Control Centre.

People are also being urged to have a bush fire survival plan in place.