The City of Perth is supporting a police crackdown on alcohol consumption at the Perth foreshore on Australia Day.

Police will be seizing alcohol with offenders facing the possibility of a $200 fine.

In the past, police have targeted drunks and troublemakers but are warning this year there will be no exceptions.

The City's CEO, Frank Edwards, says he does not expect the crackdown to reduce the numbers of people who will turn up.

"I believe it will encourage families to come out and if it keeps away a few people whose only interest is alcohol, then so be it," he said.

The Police Commander for the Skyworks show this year, Michelle Fyffe, says police will be enforcing the law.

"It is illegal to drink alcohol in public 365 days a year, it doesn't say except for Australia Day, so it's illegal to do it and we will be policing it and enforcing the law," she said.

Acting Assistant Commissioner Fyffe says even people having a 'quiet drink' won't be exempt.

"This is a very large event and we certainly have our priorities and we are going to target troublemakers first but my officers will be patrolling the whole area and they have been instructed to specifically look at this issue," she said.

"Street drinking is illegal and they will take action."