Victorians face huge on the spot fines if they fail to follow social distancing rules.
Melbourne beaches are also now closed as harsh social distancing rules come in today play.
Police will issue $1,652 fines to people gathering in large groups, or ignoring 14-day self-isolation requirements for new arrivals.
“If you see people doing the wrong thing, call it out,” said Victorian Premier Daniel Andrews on Saturday morning.
The Premier and Police Minister said police would begin patrolling beaches as Melbournians are tempered to the coast in warm weather.
There were 111 new Covid-19 cases in Victoria as of Saturday morning, 658 total so far.
Various beaches at Sandringham, Brighton and Black Rock are now closed to the public.
Bayside City Council said the bans would be in place until further notice.
“This weekend, council officers will be deployed along the foreshore to inform residents of the beach closure and make sure people are not congregating on the beach,” a council spokeswoman said in a statement.
“Bayside is a connected and responsible community and we urge our residents to do the right thing.”
Video: Daniel Andrews press conference