French vineyards battle extreme heat as climate pressures mount

French wine producers are facing another difficult growing season as record-breaking temperatures compound the effects of frost, hail and prolonged drought across key regions.

French vineyards are facing mounting pressure after temperatures climbed as high as 44°C during June’s record-breaking heatwave.

Viticulture experts warn that extreme heat is disrupting vine growth, drying soils and increasing the incidence of sunburnt grapes, with some producers already reporting significant crop losses.

Dr Alistair Nesbitt, CEO of Vinescapes, said: “When it gets too hot, the vines shut down. The soil becomes very dry. If there is no moisture in the soil, then no moisture is being pulled into the vines. It creates a really unsuitable growing environment. Producers in France and elsewhere are really struggling.”

One grower in the Loire Valley reportedly lost around 40% of their crop as grapes became damaged by prolonged exposure to intense sunshine.

Wine styles under threat

Beyond reducing yields, sustained heat is also affecting grape composition.

Smaller berries with altered sugar, acid and flavour balance are becoming increasingly common, raising concerns that traditional French wine styles could gradually change if extreme weather persists.

The latest heatwave arrives as many producers continue to grapple with falling domestic wine consumption, rising production costs and increasing international competition.

UK vineyards benefit, for now

While France battles extreme heat, Britain’s wine industry has enjoyed a period of rapid expansion as average temperatures have risen.

According to industry figures, vineyard area across England and Wales increased by almost 400% between 2004 and 2021, with warmer growing seasons supporting larger harvests and improved grape ripening.

English sparkling wines have collected major international awards in recent years, while still wines including Chardonnay and rosé have also attracted growing recognition.

However, experts caution that these gains may prove temporary.

Climate change brings new risks

Researchers warn that climate change is creating both opportunities and threats for wine producers.

Although warmer temperatures have benefited cooler regions such as southern England, increasingly unpredictable weather also raises the likelihood of spring frosts, heavy rainfall, drought, hailstorms and the spread of pests and diseases.

Many growers are therefore investing in regenerative viticulture to improve vineyard resilience.

Cover crops, compost applications, reduced cultivation and lower chemical inputs are increasingly being adopted to improve soil health and water retention.

Dr Nesbitt added: “The result is we can store more water in soils and we can build resilience to climate change. It is not all doom and gloom. There is a positive story coming out of this.”

French growers under strain

The latest heatwave adds to a succession of climate-related setbacks for French producers.

As previously reported by the drinks business, growers have endured repeated droughts, heatwaves, frost and hail in recent years, prompting protests over declining profitability and calls for greater government support.

Many producers argue that extreme weather is no longer an occasional hazard but an annual feature of vineyard management.

Without continued adaptation, climate experts warn that traditional wine regions could face further declines in both yields and quality, while newer regions may increasingly benefit from conditions once considered too cool for premium wine production.

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