Italy Starts Its Earliest Grape Harvest on Record After 50 Days of Heat

Italy’s 2026 grape harvest started earlier than any previous harvest on record in the country, with some vineyards finishing by the end of August after an unusually long stretch of heat and, in several southern areas, severe water stress.

Demeter Italia, the biodynamic certification group, said the harvest ran 10 to 15 days ahead of historical averages in many areas and as much as three weeks early in some cases. In Franciacorta, where grapes are grown for sparkling wine, the first picking began in July, an unusually early start for a region that normally harvests later in the summer.

Michele Lorenzetti, a biodynamic winemaker and agronomist at Terre di Giotto in Mugello, told Demeter Italia that the 2026 season marked a clear break from past patterns in Italian viticulture. He said the early harvest was driven by a combination not seen before on this scale: available water from rainfall, especially in northern Italy, followed by more than 50 days of steady heat at 36-38C beginning abnormally early in mid-June.

The effect was not the same across the country. Lorenzetti said the strongest heat first hit central and north-central Italy, while conditions in the South were initially less extreme through late August. Sicily, he said, also received significant rain in July and August. Only later did southern regions begin to experience conditions similar to those that had already affected central and northern vineyards.

Even where vines continued to produce healthy fruit, the heat changed how grapes ripened. Lorenzetti said many growers tried to protect clusters by maintaining denser canopies and providing more shade, but sunburn, shriveling and dehydration still appeared in many vineyards. That, he said, forced a slower and more selective harvest because growers seeking quality had to sort bunches one by one in the field.

He also said the problem was not only sugar accumulation. Good grape ripening depends in part on cooler nights, which help what winemakers call phenolic maturity, the development of tannins, color and other compounds that shape wine quality. This year, he said, many harvests were completed in August under tropical nights that did not allow temperatures to fall enough for that stage to develop normally.

That issue matters beyond the vineyard. Earlier harvests can force wineries to reorganize labor, tank space and grape intake over a shorter period, and they can affect the balance of acidity, alcohol potential and phenolic ripeness. For producers of both still and sparkling wines, those shifts can influence style, volume and release planning even when grape health remains strong.

In Abruzzo, the season was defined less by heat alone than by a prolonged lack of water. Camillo Zulli, an oenologist and agronomist who directs Bio Cantina Sociale Orsogna, said vineyards there faced intense hydric stress after the end of June. Orsogna manages about 1,400 hectares of entirely organic vineyards, including roughly 800 hectares certified by Demeter.

Zulli said that as soil moisture fell, vines began drawing water directly from the grapes, reducing berry water content and pushing sugar concentration higher in an uncontrolled way. To preserve the balance between sugars and acidity, he said, growers in Abruzzo and in the cooperative’s associated vineyards in Sicily moved the harvest forward by about 20 days.

According to Zulli, grape quality remained high, helped by the good sanitary condition of the fruit, but production fell sharply. He said average output declined by 25% to 40%, with a further loss in winery yield between the grapes delivered and the juice obtained during vinification. Lower volumes of juice from already reduced harvests could tighten supply for some producers even when bottle quality holds up.

The early end to the season in several areas adds to concern that harvest timing is moving faster than vineyard and winery systems were built to handle. In sparkling wine regions, where freshness and acidity are especially important, earlier picking may become more common as growers try to protect balance before sugars rise too far. In warmer areas making reds, producers may face harder choices on when to harvest if acidity falls before full phenolic maturity is reached.

Demeter Italia presented the season as a test of biodynamic and soil-focused farming methods. Lorenzetti said practices aimed at raising organic matter, building root systems, using compost and cover crops, and avoiding soil disturbance during the hottest periods can help soils retain freshness and support vines under stress. He also said training systems that offer more shade, such as pergola-style structures, can provide more protection than exposed row plantings in periods of constant high heat.

Those claims reflect one school of viticulture rather than a consensus across the whole sector, but the agronomic direction described by Lorenzetti and Zulli overlaps with a broader response now seen in many wine regions: more attention to soil water retention, canopy management and flexible harvest decisions as heat waves become more frequent.

Zulli said Orsogna has been applying dry-farming techniques in Abruzzo and Sicily in projects developed with the University of Perugia and the University of Naples Federico II. He said those methods are designed to maximize water storage in the soil during autumn and winter, then reduce evapotranspiration and preserve moisture during summer. A central element, he said, is the use of mature organic matter that can hold water in the soil and make it available to vines during dry periods.

The 2026 harvest is now being treated by growers and winemakers as more than a difficult year. It is also being watched as a signal of how quickly climate pressure is changing the calendar of Italian wine production, from vineyard work to harvest logistics and the final profile of the wines that reach the market.