The total yield is expected to be 3.69 tons/hectare, which is above last month's forecast of 3.47 tons/hectare and 2015's 3.67 tons/hectare.
The expected harvest in the Western Cape, which produces more than half the total crop, will be 10% higher than previously forecast.
The Free State crop is unchanged at 308,000 tons. In the Northern Cape the estimate has been increased by 5.6% to 266,000 tons.
Winter wheat is planted in May and harvested in November.
The committee also forecast the malting barley crop would be 9.5% higher than expected in November, at 339,135 tons, although the canola crop would be 3.0% less at 108,860 tons.
