Riverina Winegrape Growers chairman Bruno Brombal said the weather had been a bit 'touch and go' with days of 45 degrees Celsius and storms drenching crops and paddocks.

"But the weather's cleared and everything has settled down. It's fantastic weather for grapes," he said.

With the cool nights and warm days ideal for harvesting he expected the harvest to wrap up in 10 days.

"Most reds will go this week and next week, then it will just be bits and pieces, every harvester is booked out, you couldn't get a harvester at the moment," Mr Brombal said.

While Griffith's harvest is progressing well, other Riverina wineries have been beset with trouble linked to the catastrophic bushfires.

A number of Wagga growers have chosen to abandon their 2020 vintage due to smoke taint in their grapes.

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There have been no such worries about quality in the MIA and a lack of disease and high sugar readings was a big positive for growers.

"I'm not sure we'll hit 300,000 tonnes but the quality is great," Mr Brombal said.

"I've heard no complaints about quality. It's one of the better vintages I'd say."

Meanwhile, Mr Brombal said administrators running the 2020 vintage at McWilliam's was a vote of confidence in the region's growers and one of the region's oldest wineries.

He said outside of a handful who had left, McWilliam's had kept most of their growers for this season.

Mr Brombal said there was talk of strong interest in from potential buyers of McWilliam's which was positive for the area and industry as the last thing growers needed was to see the winery close down or leave.