It’s a bleak outlook for domestic wine production, with a two-decade low forecast. 

Estimates suggest New Zealand's output will be down 21% this year. 

Director-General of International Organisation of Vine and Wine, John Barker says it's largely due to frost damage in Marlborough. 

He told Heather du Plessis-Allan other climate issues contributed to a low wine output from the Southern Hemisphere. 

Barker says the Northern Hemisphere will be likely worse because of a small harvest from France. 

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