Mafra, Portugal offers 10 beaches perfect for sunbathing, surfing, swimming, and more. Mafra is known for the Mafra National Palace, a monumental Baroque and Neoclassical palace-monastery. The best time to travel to Mafra, Portugal, is from May to September, when the average air temperature is around 20-25°C (68-77°F) and the water temperature is approximately 18-20°C (64-68°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!