Ciatti California Report - August 2024

Heatwave arrives; grape market remains slow

July was likely the warmest on record for much of the western US, with California receiving the highest heat levels and areas of the Central Valley suffering two weeks of 100-110°F temperatures. The heat has since dissipated slightly in early August, although consistent, more normal temperatures in excess of 85°F are forecast. The general feeling is that vineyards across the state will have been affected by such a prolonged heatwave: Some – limited – burn damage has been in evidence and there is a suspicion that berry sizing has been hindered.

The dividends from California’s wet winter are now making themselves felt: Despite the hot summer, soil moisture levels in many places remain relatively good – even at this stage – and canopies appear healthy. Given this and the fact many cash-strapped growers are economizing on treatments, there has been some mildew pressure, but still at normal levels. Also normal is timing, with ripening proceeding perhaps 2-4 weeks ahead of last year’s greatly-delayed season: Harvesting of some early-season whites got underway in the Central Valley during the last week of July and is expected to commence in some Coastal areas in mid-August.