Victorian Premier Daniel Andrews has stamped his personal authority over an 8pm curfew imposed across Melbourne, after Police Commissioner Shane Patton said police were only told "a couple of hours" before it began.

The state's Chief Health Officer Brett Sutton had revealed a day earlier that the curfew, which has now been in place for 58 days, was not his idea either and health experts including the Grattan Institute’s Stephen Duckett say evidence for a curfew is "very, very limited".

Mr Andrews took personal responsibility for the curfew on Thursday, after two days of questions about it at his daily press conference, but couldn’t recall who recommended it.

The Premier is facing growing pressure to drop the curfew or publish data to back up why it is necessary, given ordinary parliamentary and cabinet processes have also been suspended.

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