Premier Daniel Andrews said on Saturday there had been 25 new cases of coronavirus in the past 24 hours with 14 linked to known outbreaks, one in hotel quarantine and the source of six infections still being investigated.

From midnight Sunday, the number of visitors allowed at your home will reduce to five.

Outside the home, families and friends can meet in groups up to 10.

Mr Andrews also announced a delay in the increase to gathering limits in business and community facilities.

Restaurants, pubs, auction halls, community halls, libraries, museums and places of worship that were set to be allowed to welcome up to 50 patrons through their doors from Monday will stay at a maximum of 20 people in any one space until July 12.

Business that were set to open on Monday like gyms, cinemas, theatres and TABs can do so, but only with a maximum of 20 customers.

Community sport for children and non-contact competition for adults can proceed as planned. Ski season and accommodation facilities with communal spaces will also open, but with increased screening and safeguards in place.

"The experts tell us that, largely, the numbers are being driven by families - families having big get-togethers and not following the advice around distancing and hygiene. In fact, around half of our cases since the end of April have come from transmission inside someone's home," Mr Andrews said.

"You can see how this could happen. People feeling relaxed at home. Letting their guard down. Letting old habits creep back. But we are still in a pandemic - and people's lives are still at risk."

Mr Andrews acknowledged Victorians would be disappointed and frustrated at the reimposition of tighter restrictions but said they were necessary to ensure coronavirus cases did not get out of control.

"We will go door to door getting the message out there to the community across the state that these restrictions are there for everyone. We will also go door to door not just in getting the good public health advice out to people, we will go door to door if we have to to make sure people are doing the right thing," Mr Andrews said.

"The key point here is not just doing the wrong thing by your own family, you might somehow find a way to be comfortable with that, but you are doing the wrong thing by every Victorian family."

The newly announced measures will be in place until midnight on July 12.

Mr Andrews said the three-week period was chosen because it was the life-cycle of the virus.

"All of these changes relate to that three week period three weeks being full life cycle of this virus where we think we will get the best and clearest picture of exactly what is going on out in the community," Mr Andrews said.

"It's not over and whilst in a public setting where there's a degree of formality and structure no one is greeting each other with a hug, kiss or hand shake, in residences it's pretty clear that behind closed doors when one family comes together in large numbers and potentially goes to visit another family they are not practicing social distancing, they are not in a controlled environment.

"I take no pleasure in having to impose these measures. Unless we can break the cycle of people who are unwell, who have symptoms, even those who have a positive test or are close contacts of someone has positive test. ignoring requirements of isolation and socialising we will see more and more cases.

"This puts everything we have built, everything we have achieved as a state, a unified state working together, at risk and I simply won't allow that to happen."

The Australian Hotel Association's Victorian president David Canny said while the industry understood coronavirus was a health issue that needed to be dealt with, that did not mean it was not 'disappointed' with the news.

Pubs across the region had been looking forward to welcoming more patrons into their doors from Monday - from 20 people to 50 at a time.

"Pubs have been doing a fantastic job at getting through this and managing their numbers and were really hoping to expand next week," Mr Canny, who is also the publican at the Red Lion Hotel, said. "But now it has been pushed back a few weeks."

While the requirement for food to be ordered along with alcohol was set to be lifted in two days and premier Daniel Andrews said this would be a good thing for regional pubs, Mr Canny said it was a 'catch 22'.

He said it would be good to be able to serve alcohol outside of mealtimes, but that because numbers are still limited, pubs still needed people to spend a bit more.

"While numbers are still restricted, having people need to buy food has been good because they are spending more," he said.

"We wanted food restrictions lifted and capacity to increase at the same time."

Mr Canny said pubs would continue to provide confidence to authorities so they can open up further to serve more people.

SEE THE FULL TEXT OF DANIEL ANDREWS' STATEMENT

From the outset, we have always listened to our medical experts. And they're telling us we've come to a critical crossroads.

Today, our case numbers have hit the highest they've been in more than two months. I know that's not what people want to hear - but sadly, that is our reality.

The experts tell us that, largely, the numbers are being driven by families - families having big get-togethers and not following the advice around distancing and hygiene. In fact, around half of our cases since the end of April have come from transmission inside someone's home.

You can see how this could happen. People feeling relaxed at home. Letting their guard down. Letting old habits creep back. But we are still in a pandemic - and people's lives are still at risk.

It's why today, we're announcing a number of changes.

From 11:59pm on Sunday, the number of visitors you can have at your home will reduce to five. Outside the home, families and friends can meet in groups up to ten. As we've seen across the world, this virus has the ability to turn a few cases into hundreds in a matter of days.

That's why we also need to delay an increase to gathering limits in businesses and community facilities.

That means restaurants, pubs, auction halls, community halls, libraries, museums and places of worship - will all stay at a maximum of 20 people in any one space until 12 July. Businesses that were set to open on Monday like gyms, cinemas, theatres and TABs can do so - but again, only with a maximum of 20.

Community sport for kids and non-contact competition for adults can proceed as planned. Ski season and accommodation facilities with communal spaces will also open, but with increased screening and safeguards in place.

I know this is not where we wanted to be. And that Victorians will feel disappointed and frustrated. I'm frustrated too. But we have to channel that frustration into action.

We can't let this thing get away from us. We must act - while we can.

That means staying safe while out in the community - but just as importantly, staying safe at home. And that means only seeing those you need to - if you need to. Not your third cousin. Not your third best friend from primary school.

Each of us need to be aware that the more people you see and the more often you see them - the more danger you are putting people in. There are other things we need to do.

If you do have to see people, keep your distance. No handshakes and no hugs. Maintain good hygiene. Don't share food or drinks. And if you're feeling unwell - stay at home.

Don't visit friends and family. Don't go on holiday. Don't go to work. Stay home.

We want to make this as easy as possible.

Which is why we're also announcing a new $1500 payment for those who have a confirmed case or are a close contact and who can't rely on sick leave. This is about making sure there's no financial reason for these people not to isolate and to go to work instead.

I know businesses are keen to open further - which is why we've all got to play our part.

That means ensuring those who can work from home continue to do so at least until 31 July. And if you do have people on the job - having a zero-tolerance approach to sickness. Having symptoms must mean you go home, and you get tested.

We'll also look at ways we might begin to contain hotspots - if we keep seeing high case numbers each day, we will have to consider putting whole suburbs back into lockdown.

The vast majority of Victorians have been doing the right thing.

But this is a wake-up call. We cannot be complacent.

And the only thing between us and a second wave is what we do next.

- With Hayley Elg

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