Vinetur reports that Castilla-La Mancha, Spain’s largest wine-producing region, has dropped its 2026 harvest forecast amid extreme heat and increasingly unpredictable conditions late in the growing season. The decision removes an important early planning benchmark for wineries, grape growers and buyers, reflecting uncertainty over how heat and changing weather will ultimately affect yields. The development adds to evidence that climatic volatility is making pre-harvest estimates increasingly difficult across major European wine regions.