There were two rallies in Sydney and one in Byron Bay in the state of New South Wales, which also breached local restrictions against large gatherings.
"Essentially, each of these steps is less than we would like to do", Mr Andrews said.
The four-step return was full of "inconsistency" she said.
Victorians were warned earlier on Sunday that daily coronavirus cases might not be low enough by mid-September, raising the prospect of more months under restrictions. You're going way more hard-nosed on this'.
A hard lockdown in Melbourne - the capital of Australia's coronavirus hot spot state of Victoria - will be extended through September, with some restrictions continuing until at least late October, it was announced on Sunday, as the infection rate has declined more slowly than hoped.
Starting from 11:59 p.m. on September 13, some stage 4 restrictions will begin easing, with the nightly curfew starting at 9 p.m. instead of 8 p.m., people will be allowed outdoors for up to two hours instead of one, and those living alone will be allowed to have a visitor.
Australia will receive the first doses of an AstraZeneca and Oxford University Covid-19 vaccine next January if trials prove successful, after Canberra agreed on a deal to purchase a second potential vaccine, Prime Minister Scott Morrison is expected to say tomorrow.
At the same time, the curfew would be lifted, there would be no limits on leaving home, outdoor gatherings could increase to 10, homes would be able to have five visitors, and some adult non-contact sports could resume.
Discontent in some quarters has grown throughout Melbourne's lockdown, with a small minority expressing opposition to the premier's cautious approach. "We have to take steady and safe steps out of lockdown to find that COVID normal", Mr Andrews said.
"And we will be back in and out of restrictions, coming in and out of lockdown, before the end of the year".
'I want a Christmas that is as close to normal as possible and this is the only way, these steps are the only way that we will get to that point'.
All remaining restrictions will be removed when Victoria goes 28 days with no new cases, although masks will likely remain compulsory for some time.
The premier said the nominated 14-day average of five cases provided a 97 per cent chance of avoiding having to go back into lockdown.
Under the government's plan, childcare centres will reopen and up to five people will be able to gather outdoors from the end of September - but only if cases fall below an average of 50 per day.