Melbourne's CBD was but a whisper compared to the revelry that gripped Geelong after a rainy AFL Grand Final.

Police had expected a surge in crowds following the Cats' victory over St Kilda, but authorities said on Saturday night that those who did head into the city were well behaved and took to heart widely-advertised messages that pleaded for people not to drink and drive.

"I think the message is starting to get through that we want people to come out and have a good time but if you misbehave then we're going to deal with you," Victoria Police Chief Commissioner Simon Overland said while on patrol along Swanston Street.

Only two people were over the limit out of the 3,000 drivers breath tested at several booze buses outside the MCG.

And there were no reports of violence in the CBD by midnight, with only 11 people out of 100,000 being removed from the MCG for alcohol-related offences.

Mr Overland said Saturday's wind and rain could have had an impact on crowd numbers and activity after the game.

"The cold weather can have an impact, it can make a difference," he said. "But again there's lots of people - there were 100,000 people at the MCG... and Geelong obviously is buzzing after their fantastic win in the grand final.

"But so far the reports are things have seemed to go pretty well down there."

At Moorabool Street, in the heart of Geelong, fans had moved well into roaring jubilation by Saturday evening.

It sounded more like downtown Manhattan as a chorus of car horns and screaming broke out after the Cats' win and it continued throughout the night.

Police had moved more officers into Geelong following their 12-point win and were monitoring hot spots of nightlife activity in Chapel Street and St Kilda.

Brought to you by AAP © 2024 AAP