Avintes, Portugal offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Avintes is not particularly known for travel and beach tourism. The best time to travel to Avintes, Portugal, is during late spring (May to June) or early autumn (September), when the average air temperature ranges from 18°C to 25°C (64°F to 77°F) and the water temperature is around 17°C to 20°C (63°F to 68°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!