Premier Peter Gutwein made the announcement to extend border restrictions in Parliament on Tuesday, based on advice from Public Health Services.

He said the long time frame towards the possibility of relaxed border restrictions would allow the community and businesses to plan appropriately for a reopening.

"At the moment the risk posed to Tasmania by the situation in Victoria is considerable," Mr Gutwein said.

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"There are many Tasmanian businesses, which have had to close their doors, who are only just returning to reasonable levels of trade, and many others who are still doing it very tough.

"But we must avoid a situation like Victoria or New South Wales, as we would have to impose serious restrictions once again.

Labor leader Rebecca White said the government needed to ensure border restrictions were robust enough to protect Tasmanians from any case of coronavirus.

Greens leader Cassy O'Connor said she supported Mr Gutwein's decision in the interests of the health of Tasmanians.

Tourism Industry Council Tasmania chief executive Luke Martin said the industry appreciated certainty over border closures rather than the rolling updates that had occurred until now.

'We still believe the right way to go is an expanding national travel bubble among states reporting none or very few cases of COVID, to complement our local Tasmanian market," he said.

'We now look to December 1 as a critical deadline to reintroduce some level of interstate activity in time for our critical post-Christmas summer visitor season."

Australian Medical Association state president Helen McArdle said extended border restrictions would protect frontline health workers as well as the broader Tasmanian community.

Tasmanian Chamber of Commerce and Industry chief executive Michael Bailey said the announcement on extended border closures would shock many in the business community.

He said support packages offered by the government to businesses were welcome, but policy settings now needed to be examined.

"We're living in a post-COVID world, but the government still has in place pre-COVID tax and regulatory settings," Mr Bailey said.