Philip Gregan, chief executive of the 1000-member New Zealand Winegrowers, said the summer was terrible for pastoralists but "fantastic" for winegrowers. He said the long, hot summer delivered the quality for the vintage and the December flowering season delivered the quantity.
But Gregan said consumers hoping for a return to the low prices of the 2008-9 wine glut could be disappointed. He said the supply imbalance since that time had been addressed and that this season would not result in an oversupply.
"All the signs are that the wines are going to be pretty fantastic," Gregan said. "They [consumers] are really going to see some spectacular wines out of this vintage."
Demand from overseas would determine pricing and Gregan said there had been a rise in wine prices over the past 12 months "and that's not going to disappear".
He said there was renewed optimism in the industry, helped along by a more exporter-friendly Kiwi dollar against the US dollar.
However, he said a New Zealand dollar at near five-year highs against the Aussie dollar was causing some concern because Australia was the country's biggest customer. In the year to May, wine exports were worth $1.2 billion with Australia being responsible for $368 million, or 30 per cent, of the total.
Rabobank said wine grape production in the Southern Hemisphere appeared to have been healthy.
"Nearly all major southern supply countries are set to register above-average crops for 2013, with Chile and South Africa also expected to harvest record crops, and Australia to record its largest harvest in five years," Soccio said.
New Zealand wine export volumes declined by 8 per cent in the first four months of the year as exporters waited for larger volumes from the 2013 vintage to come on stream.