Premier Peter Gutwein, Health Minister Jeremy Rockliff, Public Health director Mark Veitch and other officials held several briefings over the weekend and on Monday morning to discuss the emerging issue.

Three cases of the Omicron variant have been detected in Australia - two in Sydney and one in the Northern Territory, all in quarantine.

Tasmania has already reinstated 14 days of quarantine and mandatory testing for any arrivals from nine southern African countries.

READ MORE: Councillor allegedly flashed woman three times on beach

One person who had travelled from the countries has been identified in Tasmania so far, who has tested negative.

State health commander Kathrine Morgan-Wicks said there was no indication that Tasmania's plans to fully reopen its borders on December 15 would change.

"We will be closely monitoring this new variant, and I'm satisfied in terms of the steps that have currently been taken to protect our quarantine environment and our borders relying on the 14-day quarantine for all international arrivals from all countries of concern," she said.

"At the moment I am assured that 15 of December, as the Premier has noted, [is] the date that our very highly vaccinated population will be opening.

READ MORE: Man in custody after setting fire to house during siege

"It's very early days in monitoring the Omicron variant."

As of Monday morning, 86.6 per cent of Tasmanians aged 16 and above were fully vaccinated and 93.7 per cent have had a first dose.

The state was unlikely to meet the target of 90 per cent fully vaccinated by December 1, but health authorities were confident it could be reached by December 15.

READ MORE: August dates sour Agfest for dairy farmers

New quarantine rules will be introduced to coincide with the border opening and the likely community transmission of COVID, including vaccinated close contacts only needing to quarantine for seven days if negative tests are provided.

Ms Morgan-Wicks said there were a range of methods at the disposal of authorities to ensure compliance.

"Using various methods including technology such as being able to ping the person's device to check that they're actually geographically located where we expect them to be," she said.

Our journalists work hard to provide local, up-to-date news to the community. This is how you can continue to access our trusted content: