Beauval-en-Caux is a commune in the Seine-Maritime department in the Normandy region in northern France. A farming village in the Pays d…Beauval-en-Caux is a commune in the Seine-Maritime department in the Normandy region in northern France. A farming village in the Pays de Caux, situated by the banks of the river Vienne, some 13 miles southeast of Dieppe, at the junction of the D50, D23 and D927 roads.