Grape picking will start today in north-eastern France - two to three weeks earlier than normal.
The mild winter and hot weather in April and May gave the grapes a flying start. But the recent wet weather has resulted in mildew in some vineyards with wine production expected to be hit. Yields are likely to be down 5 to 6%.
However, some wine producers believe this will help firm up prices as it will reduce the amount of low quality wine on the market.