VICTORIA has become the centre of activity for the eastern seaboard's grain harvest.

Harvesting has either ended or nearing completion in Queensland, northern and central NSW, the western Riverina and Victoria's Mallee.

Bulk handler GrainCorp said harvesting was firmly concentrated in the southern grain belt, with some activity still in the Henty area, the Wimmera getting into full swing and canola being delivered into Western District receival sites.

GrainCorp has now received 8.5 million tonnes of grain into its storages, with deliveries into Geelong and Portland zone sites accounting for 2.2 million tonnes.

Receivals into NSW port zone storages have now topped 4.7 million tonnes, while Queensland deliveries have totalled 1.6 million tonnes.

GrainCorp said high winds during the past week had impacted on some storage sites, as the company moved to ensure they were safe for grain receivals.

Tarpaulins on bunkers are a particular danger.

Two years ago, high winds stripped a GrainCorp bunker at Corio of its tarpaulin, throwing an employee to his death.

Meanwhile, harvesting in South Australia and Western Australia also continues.

SA bulk handler Viterra said it had received 4.6 million tonnes of grain to date, with more than 737,000 tonnes delivered during the past week.

Harvesting is virtually completed or near completion on the Eyre and Yorke peninsulas and the northern region of the state.

Viterra said growers in the Murray Mallee region should be close to winding up if fine weather prevails, while the southeast of the state has finished its barley harvest and wheat was now the major grain being received.

Rain has hampered the WA harvest during the past week, with CBH receiving 1.5 million tonnes into its storages.

It now has nearly seven million tonnes received to date.

CBH said the Kwinana zone had a frustrating week, with only two out of seven days providing solid harvesting conditions.

The bulk handler said falling number machines had now been set up at all Kwinana and Albany zone prime sites in response to wet weather.