A great recent paper, Future viability of European vineyards using bioclimatic climate analogues, examines how Europe’s wine map could change as the climate warms. It compares the future climate of established vineyards with places experiencing similar conditions today, while considering not only temperature but also frost, extreme heat, humidity, rainfall and three major vine diseases.
The researchers analysed 21,076 vineyard sites and considered conditions around 2040, 2060 and 2080. They adjusted their calculations for elevation, slope and exposure, which can make an individual vineyard considerably warmer or cooler than the surrounding area.
The main conclusion is that European wine production will not simply move north. Temperature does push suitable conditions northwards and to higher elevations, but rainfall and humidity create a different pattern because they affect fungal disease. Once downy and powdery mildew are included, many apparently promising northern sites become much less attractive. In the model, downy mildew alone removes 25% of potential new vineyard locations by 2040, 48% by 2060 and 71% by 2080.
Southern European vineyards face the greatest danger from excessive heat. Problems could begin by around 2040 in southern Spain, Portugal, Italy, Greece and Turkey. By 2080, potentially unsuitable conditions extend into central Spain and Italy, northern Portugal, Bulgaria and southern Romania. The study estimates that the risk affects 46% of existing vineyards south of latitude 46° and 74% of those south of 40°.
This does not mean that famous regions such as Rioja, Chianti or the Douro will simply stop producing wine. It means that some existing sites may become too hot for their present grape varieties and methods. Growers may need later-ripening or more heat-tolerant grapes, different canopy management, altered harvest dates, irrigation where permitted, or vineyards at cooler elevations. Some traditional regions may initially achieve more reliable ripeness or better quality, but the paper expects longer-term adaptation to become unavoidable.
Disease is nearly as important as heat. The risk associated with flavescence dorée, spread by a leafhopper, rises across virtually all European vineyards in the model as warmer weather allows the insect to develop faster and expand northwards. Germany, Switzerland, Burgundy and Champagne are also projected to experience roughly a 15% increase in days favourable to downy and powdery mildew.
For the UK wine consumer, the likely consequence is a gradual reshaping of choice rather than the disappearance of European wine. Traditional regions may change the grapes they grow, move production towards cooler sites and produce wines with a different balance from those consumers recognise today. Harvests may become less predictable where extreme heat, early bud burst, frost or disease reduce yields. More disease management, difficult hillside cultivation and vineyard relocation could also increase production costs and raise sustainability concerns. The paper notes that steep, high-altitude vineyards are expensive to operate because mechanisation is difficult and plots are often fragmented.
The outlook for English and Welsh wine is therefore more complicated than “warmer weather means better wine”. Northern Europe may acquire enough warmth to ripen a wider range of grapes, potentially supporting further growth and greater stylistic diversity. Yet its relatively wet and humid climate could expose vines to substantial mildew pressure, requiring resistant varieties, careful site selection and possibly more intensive treatments. The authors explicitly conclude that humidity and precipitation may limit the long-term viability of northern European vineyards even where temperatures become suitable.
The conclusion is not that particular appellations are doomed, but that familiar wine regions, grape varieties and vintage patterns are likely to evolve. Expect more interest in cooler elevations, northern and eastern European regions, disease-resistant grapes and producers able to adapt without sacrificing quality or environmental standards.
