Tasmania's borders are unlikely to completely reopen while there is still "significant community transmission" of COVID-19 in Victoria, Premier Peter Gutwein has said.
After a formal review of the COVID-19 situation on the mainland is undertaken, Mr Gutwein is on Friday expecting to give an update about when the state's borders will reopen.
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Tasmania's borders were slated to reopen on July 24, but the date was subject to change if COVID-19 cases increased significantly on the mainland and Public Health advice changed.
"I can't see that if we were to open our borders tomorrow that we'd be opening them to Victoria," Mr Gutwein said on Sunday.
"It's quite clear that Victoria have significant community transmission in a number of postcode areas...what's occurring there is very concerning."
Mr Gutwein did not rule out reopening Tasmania's borders to other states.
"Other states and territories are in a much better position than Victoria and it's important that we take that into account," he said.
"Regardless of who's lobbying me or who's calling for our borders to be reopened, at the end of the day I'll take Public Health advice and I'll base my decision on that."
Issues such as whether or not "appropriate transiting arrangements" could be put in place at Melbourne Airport also needed to be considered when border decisions were made, Mr Gutwein said.
"What's important to understand as well is whether or not there is community transmission from Victoria into New South Wales," he said.