Extreme Heat Pushes Germany’s 2026 Grape Harvest Into August

Germany’s 2026 grape harvest began in August in several wine regions, one of the earliest starts many producers say they have ever seen, as extreme summer heat pushed different grape varieties to ripen almost at the same time and forced crews to work at dawn, and in some places at night, to protect both fruit quality and workers.

According to a report from Slow Food Deutschland, many wineries again recorded the earliest harvest in their history. At some estates, all of the grapes had been brought in and pressed by the middle of September. Growers said the pace was unusually fast because varieties that would normally be harvested weeks apart were ready within a narrow window from late August to early September.

The early harvest followed a summer marked by record temperatures and little rain. But growers and wine industry officials said the crop was helped by high winter moisture and a mostly wet May, which prevented more severe drought stress in many vineyards. Even after another heat wave in September, many vines still had enough water, the report said.

The combination produced a complicated vintage. Growers described the fruit as very healthy and fully ripe, with small berries and concentrated flavors. At the same time, they reported low juice yields from the press, meaning the volume of must, the freshly pressed grape juice used to make wine, was lower than the appearance of the crop had suggested.

Hansjörg Aldinger of the Aldinger winery in Fellbach, in Württemberg, told Slow Food Deutschland that an early harvest had become necessary to preserve acidity. He said his estate started picking on Aug. 18, three days earlier than in the already early 2018 vintage. By mid-September, the winery had finished processing all of its grapes.

That concern over acidity has become central for German producers as temperatures rise. In a typical year, growers monitor both ripeness and Oechsle, the German measure of grape sugar. In 2026, several growers said they were not worried about reaching sugar levels. The bigger question was how to keep enough freshness in the grapes while avoiding overripe fruit and excessively heavy wines.

Despite the heat and dryness, growers said acidity held up better than expected in many places because the small berries concentrated not only sugars and flavors but also acids. That balance may prove important for Germany’s wine sector, where accelerated ripening and lower must yields can affect both the style and supply of finished wines. Smaller volumes of juice could limit output for some bottlings, while the need to harvest earlier or overnight may increase labor and cellar pressures for producers and, potentially, reshape supply for the broader beverage trade.

In the Kaiserstuhl region of Baden, Alexander Schneider of Weingut Schneider in Endingen said the 2026 crop combined small quantities, small berries and very healthy, ripe fruit. Slow Food Deutschland quoted him saying the harvest team often had to stop by 2 p.m. because of the heat. The report said the southwest of Germany recorded more than 60 days above 30 degrees Celsius, or 86 degrees Fahrenheit, this year.

For crews in the vineyards, the conditions were physically demanding. Ernst Büscher of the German Wine Institute said some regions harvested at night again this year. Growers said early starts were necessary so workers could be in the vineyards shortly after sunrise. The shift in working hours is one of the clearest operational changes linked to hotter summers.

Philipp Kuhn, a winemaker in the northern Palatinate, used unusually strong language to describe the fruit. Slow Food Deutschland quoted him as saying it was “as if a UFO had landed,” adding that in 35 years of experience he had never seen grapes so perfect and so uniform. Such assessments reflect the quality of the fruit, but they do not change the fact that juice extraction was weaker than many producers expected.

Hermann Deppisch, a Slow Wine producer in Franconia, said the crop initially looked larger on the vine than it turned out to be in the press. He said that in the end, “very little came out.” The reason, he said, was the year’s high skin-to-juice ratio: thick or abundant skins, but relatively little liquid inside. For winemakers, that can reduce volume while increasing aroma and structure.

That profile is likely to favor red wines in particular. Slow Food Deutschland said growers expect concentrated reds from the 2026 vintage, with deep color, strong aroma and solid tannin structure because much of a grape’s flavor compounds are found in the skin. Deppisch also said Sylvaner handled the heat relatively well.

In the vineyards, hotter conditions also changed standard growing practices. Defoliation, the removal of leaves around the grape zone to increase sun exposure, was largely skipped this year, according to the report. Instead, growers tried to shield bunches from too much direct sunlight and removed leaves, if at all, mainly on the shaded side to improve airflow without increasing the risk of sunburn.

Another unusual feature of the vintage was how little fruit had to be discarded at sorting tables. Growers said the grapes were largely free of rot. The main fruit removed before pressing consisted of very small, raisin-like berries, which were screened out to keep sugar levels from climbing too high and to avoid dried-fruit flavors in the finished wines.

In eastern Germany, the two wine regions of Saale-Unstrut and Saxony also reported strong fruit quality. Klaus Zimmerling, an organic grower in Dresden-Pillnitz, began harvest on Sept. 3 and completed the entire picking season in about two and a half weeks without weather interruptions, the report said. But he described the volume as very low, at only 30 hectoliters per hectare.

Zimmerling also reported an unusually early harvest for Gewürztraminer, a grape that is usually picked much later. This year, he brought it in at the start of September, about seven weeks ahead of its normal schedule. The report described that kind of shift as another sign of how quickly German viticulture is changing.

Growers interviewed by Slow Food Deutschland contrasted the current harvest with much cooler decades in the past, when late October snow and unripe grapes were still possible. Today, many face the opposite problem: heat, drought, rising sugar levels and, increasingly, the need to add acidity in the cellar to keep wines balanced.