The workers from the Barnawartha North distribution centre arrived at the store from 7am, filling the carpark with their own vehicles.

It's day five of industrial action by about 350 workers from the warehouse, who are fighting for a pay rise and work conditions on par with those in Melbourne.

Union representatives and Woolworths management are meeting at 11.30am to continue negotiations.

Staff at the centre have been offered a pay rise of 74 cents per hour, compared with the $1.04 per hour offered to Melbourne workers.

National Union of Workers regional organiser Neil Smith said the city staff also received higher penalty rates and more breaks.

He said statements from a Woolworths spokeswoman that workers were asking for a pay rise "three times the rate of inflation" were false.

"That would mean we're asking for a 12 per cent increase, and that's just not true," Mr Smith said.

"We're asking for 3.5 per cent, which is the same as the metro region."

Mr Smith said this morning's protest had been "friendly", with many customers and people driving past supporting them.

"We haven't stopped anyone form going inside, we're just talking to them and letting them know what's going on, and most shoppers are supportive of us," he said.