Recent high rainfall has triggered a big turnaround for crops across the State, with many farmers expecting a bumper harvest.
Grain Industry Association of WA chairman Jon Slee said yield predictions had risen to 13-14 million tonnes, up from 8-9 million tonnes during the shaky start to the season in June.
"Some areas are in really excellent condition after fantastic rainfall during August-September," he said. "There's plenty of soil moisture there now to finish most crops off and still some frontal systems that look like they're going to come through.
"The mild finish to the season is really helping to fill grain out and should end up producing good yields in most areas."
Mr Slee said the strongest areas were in parts of the Great Southern, particularly Wandering, Williams and Darken, and north of Perth around Dandaragan and Moora.
He said WA's canola yield could reach a record high, even though strong winds along the south coast had caused some damage to crops.
Mr Slee said farmers in some regions might experience one of their biggest years, including Cascades farmer Scott Pickering.
"This is the best year this farm has ever had," Mr Pickering said.
"So long as we can get it off and put it in the bin.
"It ain't over until the fat lady sings."