Federal Treasurer Josh Frydenberg says he has tested positive for COVID-19 and is isolating with his family.

Mr Frydenberg, who has been on a break, said on Twitter he was experiencing "the common symptoms" associated with the virus.

"My thoughts are with all those who have COVID — this is a difficult time but we will get through this," he said.

Shadow Treasurer Jim Chalmers said he was sorry to hear of the positive test result and wished Mr Frydenberg well.

"Sorry to hear it, Josh. All the best for a speedy recovery," Mr Chalmers said in response to the Treasurer's tweet.

Shadow Finance Minister Katy Gallagher also tweeted in response, saying she hoped Mr Frydenberg and his family were not badly affected "and get through the next little while OK".

Senator Gallagher's daughter tested positive in August last year, prompting her to accuse the government of letting down Australian children in their handling of the virus.

"If we had more people vaccinated, our children wouldn't be as vulnerable as they are today," she said at the time.

The Treasurer visited Torquay on Monday, where he met Liberal candidate for Corangamite Stephanie Asher and a local business owner.

He was due to attend an event in Lorne on Saturday, but it was cancelled due to rising COVID-19 case numbers in Victoria.

Mr Frydenberg is the latest government MP to test positive for COVID-19; Defence Minister Peter Dutton tested positive in March 2020 after a visit to the United States, and Deputy Prime Minister Barnaby Joyce tested positive in December.

He is also one of tens of thousands of Australians who have tested positive over the past few days.

New South Wales on Friday recorded 38,65 new cases and 11 deaths, while Victoria recorded 21,728 new cases and six deaths.

Several restrictions are being reintroduced in Victoria, NSW and the ACT in an effort to curb the rapid spread of the virus.