Worldwide wine production tumbled 8.2 percent this year to hit a 50-year low due to climate fluctuations, the International Organisation of Vine and Wine (OIV) said Tuesday.

The total output of 246.7 million hectolitres was due in large part to steep drops in the top three wine producing countries: Italy, France and Spain.

In Italy production slumped 23 percent to 39.3 mhl, while in France the drop was 19 percent to 36.7 mhl. 

Production in Spain fell 15 percent to 33.5 mhl, according to the Paris-based OIV, an intergovernmental organisation that provides scientific and technical advice on vines and wine.

In the world's fourth-largest producer, the United States, production is forecast for to have held up better, with just a slide of 1 percent to 23.3 mhl.

However, the OIV noted that the forecast was based on US government estimates made before the outbreak of wildfires in California that ravaged two of the state's top wine producing areas: the Napa Valley and Sonoma County

A six percent increase in wine production to 13.9 mhl helped Australia to fifth place. It was the nation's third consecutive annual increase in output.

Argentina rebounded from a bad 2016 harvest, with output shooting up 25 percent to 11.8 mhl. But it still has not recovered to its 2015 level.

In South Africa, production was steady at 10.8 mhl.

There was no 2017 data available for China, which produced 11.4 mhl in 2016