Longer than usual queues have formed at Orange's two main testing locations at Wade Park and the Orange Showground as people prepare to leave and join families in other centres or take a holiday.

Regional manager for Barratt and Smith Michael Flynn said testing was hectic last week when Orange was identified as a COVID-19 hot spot, doing between 300 and 400 tests a day in its 8am to 4pm time bracket, and he was expecting the run into Friday, Christmas Eve, to be busy as well.

"I think until Queensland changes its rules for getting across the border [we will continue to be busy]," he said.

Mr Flynn said so far testing had been a "50-50" mix of surveillance and symptomatic residents and that the firm's staff were keeping up the demands of a 72-hour window.

Western NSW Local Health District's initial advice was that testing clinics would be closed on Christmas Day, Boxing Day and New Year's Day, however Mr Flynn said Barratt and Smith would in fact be testing on Boxing Day at its usual Wade Park base from 9am to 12pm.

It will also be open with those hours on December 27 and 28, reverting to 9am to 4pm from December 29 to 31. In fact, the only days Wade Park will be closed are Christmas Day and New Year's day. On January 2 and 3 hours will be 9am to 12pm.

WNSWLHD Acting Chief Executive Mark Spittal said some testing will also be available at hospitals but warned residents there could be long waits.

"But that is exactly why we are asking people to plan a head and understand that there will be reduced capacity on those days," Mr Spittal said during a media conference on Tuesday.

Mr Spittal supported giving collecting station staff a break.

"All of the people who have gone above and beyond at those clinics to provide those services to us, they also need time with their families and with their loved ones on Christmas day, New Year's day and Boxing Day and that's not unreasonable."

WNSWLHD is encouraging surveillance testing with Mr Spittal adding mask wearing also helped contain the spread which is expected to escalate over the festival season.