In the Entre Douro e Minho area (North of Portugal), an agroclimatologic study is made in two soils of wine, few kilometres separated from each other, and from which the topographic caracteristics and the variety of vine are different. The objective is to determine the optimal topoclimatic conditions for the culture of the vine. A climatic study on fine scales is carried out in order to determine the local influence of the surface characteristics on the weather parameters. The temperature measurements and the agronomic analysis carried out between February and April 2003 showed a strong space-time variability of the spring frost risk between the two sites and inside even of the soils
