The Acting Prime Minister has insisted it is appropriate for Scott Morrison to be having an overseas holiday as bushfires continue to burn across Australia.

Key points: The Prime Minister is overseas with his family at an undisclosed location

The Prime Minister is overseas with his family at an undisclosed location The Acting Prime Minister has hit back at "naysayers" criticising Scott Morrison

The Acting Prime Minister has hit back at "naysayers" criticising Scott Morrison Labor's leader has refused to criticise Mr Morrison despite online condemnation of the trip

Michael McCormack has confirmed the Prime Minister is overseas with his family at an undisclosed location.

Some Labor MPs have posted online barbs to criticise Mr Morrison for taking a break as bushfires continue to burn in his home state.

But those comments have not been reciprocated by the Opposition Leader, who has backed Mr Morrison having a vacation.

The bulk of the criticism levelled at Mr Morrison has been on Twitter.

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"Everybody deserves a holiday," the Acting Prime Minister told reporters.

"Everybody deserves a break. He worked hard this year, achieved great things for Australia."

Scott and Jenny Morrison have taken a pre-Christmas vacation with their daughters Abbey and Lily. ( AAP: Mick Tsikas )

Mr McCormack said it was a pre-planned trip. It comes earlier than usual, with Mr Morrison slated to travel to India and Japan in January, when prime ministers have traditionally taken a break.

Speculation on Twitter is that Mr Morrison and his family are in Hawaii, but the Prime Minister's office refused to confirm the location, citing security concerns.

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Mr Morrison is expected to return to work before Christmas but the date remains unclear. He is continuing to receive bushfire updates while he is away.

Opposition Leader Anthony Albanese said he didn't have concerns with Mr Morrison having a pre-Christmas break.

Space to play or pause, M to mute, left and right arrows to seek, up and down arrows for volume. Watch Duration: 33 seconds 33 s Acting Prime Minister Michael McCormack defended Prime Minister Scott Morrison's holiday amid the bushfire threat.

He said he had an issue with the way the Government had handled the bushfires, but not with Mr Morrison's decision to take a break.

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"I have many criticisms of Scott Morrison. One isn't when he chooses to go on leave with his family," Mr Albanese said.

"People are entitled to have leave and that's a matter for him when he takes it."

Speaking in New Zealand on Tuesday, Foreign Minister Marise Payne defended Mr Morrison.

"He has a planned break with his family, his family who have no choice in the matter as to when they are able to spend time with their husband and their father," she said.

Mr McCormack said it was a matter for Mr Morrison to explain why he was not holidaying in Australia.

"For those naysayers who are condemning him, they will probably go on holiday, too. They deserve to as well," he said.