The gates to Brimbank Park were closed on Sunday as workers took action in response to "stalling tactics" by state parks management over a new work agreement.

Three other parks, including Point Cook Coastal Park, were closed as Parks Victoria workers rallied to get the state government to lift its 2.5 per cent ceiling for pay increases across the public sector. Workers want a 6per cent increase but say they are willing to consider any offer.

Australian Services Union Victoria assistant secretary Richard Duffy said while it was regrettable that Christmas functions would be disrupted, it was up to the government to meet workers' requests and prevent further strikes.

"There are about 500 members between three unions who will be striking and these closures will continue until the government recognises the contribution these people make to the vast majority of public areas across the state.

"Parks Victoria employees are certainly not happy to be causing disruptions, but they have been left with no other choice until the state government is prepared to sit at the table and negotiate properly," Mr Duffy said.

Parks Victoria spokesman David Petty said it would work to minimise any disruption to the public.

He said alternative arrangements would be made to ensure services continued to be provided.