Península de Setúbal
Much of the area is flat and sandy, with the exception of the Serra da Arrábida, a short chain of mountains running along the south coast of the peninsula, where the soils are limestone or clay-limestone. The climate is Mediterranean, with hot, dry summers and mild but rainy winters. Vineyards in the Serra da Arrábida are cooler, owing to the higher altitude and the proximity of the sea. The Vinho Regional has recently changed its name from Terras do Sado to Península de Setúbal. The major grape grown here is Muscat of Alexandria which creates the famous Moscatel de Setúbal. The late ripening Castelão is another grape variety which enjoys the hot, sandy soils of this region.