On the flip side, the ongoing increase in international demand had proven that the quality of the country's wine was resonating with customers around the world, Gregan said.
The outlook for the 2022 harvest was challenging as wineries managed rising production costs, staff shortages, and supply chain disruptions.
"The unavailability of skilled workers due to the ongoing closure of New Zealand's borders means undoubtedly this vintage will be more difficult to manage than normal."
Meanwhile, those wineries that rely on on-premise sales continued to face setbacks as there had not been an influx of international tourists for two summers, Gregan said.
"Positively, we have seen more New Zealanders visiting cellar doors, but there are long, lean periods as we move out of the traditional Kiwi holiday period."
New Zealand exports wines to more than 100 countries, with the largest markets in Britain, the United States and Australia.
- RNZ