Alcobaca, Portugal offers 12 beaches perfect for sunbathing, surfing, swimming, and more. Alcobaca is known for the Alcobaca Monastery, a UNESCO World Heritage site. The best time to travel to Alcobaca, Portugal, is from May to September, with average air temperatures ranging from 20°C to 28°C and water temperatures around 18°C to 21°C. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!