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Climate change impact on global wine harvests

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2026-08-17 07:04 UTC → 2026-08-17 18:56 UTC · added ~~removed~~

A historical climate study of wine harvests in Beaune, Burgundy, has revealed a significant increase in the frequency of extreme heat years. Data spanning 700 years shows that while extreme heat occurred once every 17 years between 1354 and 1719, and once every 53 years between 1720 and 1987, the frequency has accelerated sharply since 1988. In the 21st century, extreme heat years have been appearing approximately every two and a half years. Temperature fluctuations are responsible for 80% of these variations, leading to a marked acceleration in harvest dates. While the average harvest date remained around September 27 for six centuries until 1988, recent averages have moved as early as September 6. Recent reports from August 2026 indicate that climate change is significantly altering grape harvest timelines across France and the United States. In Burgundy, the harvest for Crémant sparkling wines began as early as August 8, driven by intense heat and drought. In the Champagne region of France, the 2026 harvest is expected to begin as early as August 15, with most picking occurring between August 20 and 25. This is significantly earlier than the September or October windows typical before the 2000s. Linda Johnson-Bell of the Institute of Wine and Climate Change notes that this shortened cycle threatens the characteristic elegance and high acidity of the sparkling wine. Rising temperatures accelerate ripening and increase sugar levels, narrowing the window for producers to balance sugar, acidity, and phenolic maturity. In the Alpes-Maritimes region, producers report that successive heatwaves are forcing earlier harvests. Similarly, in California, the 2026 vintage is projected to be the earliest in a generation, with much of the harvest potentially completed before the end of September. By mid-August 2026, extreme heat and drought triggered the earliest Champagne grape harvest on record.

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