Since the 1980s, the harvest has changed profoundly in French vineyards. Picking dates have moved earlier, grape ripening has accelerated, and growers now have to deal with higher temperatures, more drought and more frequent heatwaves.
In 2026, this change is particularly visible. In several regions, the harvest now begins in August, sometimes well ahead of the calendars that were still usual forty years ago.
Ever earlier harvests
One of the most striking changes concerns the harvest date.
In the 1980s, September and October were still the main harvest periods in many vineyards.
Today, some plots are picked several weeks earlier.
This earliness is largely explained by climate change.
When temperatures rise in spring and summer, the vine's cycle speeds up.
Flowering, véraison and ripening can then happen faster.
The harvest calendar is directly brought forward.
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Grape ripening is accelerating
Rising temperatures also affect the composition of the grapes.
During ripening, the berries gradually accumulate sugar.
The faster the grapes ripen, the faster sugar levels can rise.
During fermentation, this sugar is converted into alcohol.
Growers must therefore monitor ripeness closely to avoid harvesting grapes that are too rich.
In some regions, the problem has completely reversed.
A few decades ago, achieving enough ripeness could be difficult.
Today, some producers are instead trying to slow ripening down.
Acidity becomes essential
Changes in the harvest are not only about sugar.
The grapes' acidity also plays a major role.
When temperatures are high, it can drop quickly.
Yet acidity brings freshness to wine and contributes to its balance.
Choosing the harvest date therefore becomes strategic.
Picking too early can give underripe grapes.
Picking too late can produce a wine higher in alcohol and less fresh.
The grower's job is to find the best balance between ripeness, sugar and acidity.
2026, a vintage marked by earliness
The 2026 harvest perfectly illustrates this trend.
In several French regions, picking began very early.
Champagne, Burgundy, Bordeaux and the Mediterranean vineyards all saw particularly early starts.
These situations show how much the historical benchmarks have changed.
A date that would have been considered exceptional in the 1980s can now become much more common.
Differences between regions
Not all wine regions are affected in the same way.
In Champagne, the challenge is notably to preserve enough acidity despite faster ripening.
In Bordeaux, producers must closely monitor both white and red grapes to avoid excessive sugar levels.
In Burgundy, Pinot Noir and Chardonnay demand great precision, as a few extra days can greatly change the final profile of the wine.
In the south of France, heat and water stress can be even more significant.
Drought and water stress
Climate change does not only mean more heat.
Drought also strongly influences the harvest.
When a vine lacks water, it suffers water stress.
Growth can slow and the grapes can stay smaller.
Yields can then fall.
In some cases, severe drought can even disrupt ripening.
Grapes do not always ripen faster simply because it is hotter.
Weather conditions must be looked at as a whole.
Heatwaves are changing practices
Heatwaves are also a risk.
Excessive sun exposure can scorch the grapes.
To protect the bunches, some growers keep more foliage.
This shows how vineyard practices are gradually adapting.
Managing the soil, shade, moisture and vegetation is becoming increasingly important.
Yields are becoming less predictable
Heat, drought, frost and hail can also affect yields.
Vintages are sometimes becoming more irregular.
One year may produce few grapes but with strong concentration.
Another may give a larger yield.
This variability forces estates to constantly adapt their decisions.
Grape varieties at the heart of adaptation
Some grape varieties withstand heat and lack of water better than others.
Producers are therefore increasingly interested in this question.
Old varieties can sometimes regain interest thanks to their ability to retain acidity or better tolerate drought.
The choice of plots and orientations can also change.
Cooler or higher-altitude areas are sometimes becoming more sought after.
Wines different from those of the 1980s
Changes in climate and harvest naturally influence the style of the wines.
Riper grapes can produce more fruit, power and concentration.
But they can also lead to more alcoholic wines.
The producers' aim therefore remains to preserve balance.
This means controlling ripeness, acidity and the harvest date.
Forty years of transformation
Between the 1980s and 2026, the harvest has changed pace.
Picking is often earlier, ripening faster, and growers face new challenges linked to temperature, drought and water stress.
This is gradually transforming practices, grape varieties and sometimes even the style of the wines.
The harvest remains a key moment in the winegrowing year.
But its calendar has become one of the most visible signs of climate change in French vineyards.
