Highly-visible police patrols are to hit the streets of central Sydney to deal with "morons who drink to excess", a senior police officer says.

Operation Simmer VI, NSW police's annual summer drive against alcohol-fuelled crime and anti-social behaviour was launched on Thursday.

Assistant Commissioner Mark Murdoch, central metropolitan region commander, urged people coming to the city centre to drink responsibly and "take personal accountability for their actions" - or face the consequences.

"If you come to the attention of police, zero tolerance will be exercised, in terms of alcohol-related violence," he said.

"You'll end up in a jail cell or at the very best in a sobering up cell where you will walk out with a $200 fine for your trouble."

The heat of summer coincides with a spike in alcohol-related crime in the city.

Mr Murdoch said police wanted to stop people who come into the city to enjoy themselves being "interfered with by morons who drink to excess".

More officers will be on foot patrol, particularly around Oxford Street and Kings Cross, with a focus on Friday and Saturday nights and around New Year's Eve and Australia Day.

Mr Murdoch said this year's campaign, the sixth, would be boosted by the trial of sobering-up centres in the CBD and eastern suburbs, which started in July.

Police are allowed to take people to the centres if they refuse to go home when told.

Mr Murdoch spoke outside Sydney Police Centre as the city was set to experience one of its warmest October days on record.

"If this is a precursor of what is to come for the next few months we are going to see a lot more warmer weather," he said.

"People drink more in warmer weather, that is a known fact. When they drink their inhibitions get put to one side and they play up, unfortunately."