Quarteira, Portugal offers 9 beaches perfect for sunbathing, surfing, swimming, and more. Quarteira, Faro, Portugal, is known for its stunning beaches like Praia de Quarteira and the nearby Vilamoura Marina. The best time to travel to Quarteira, Portugal, is from May to September, when the average air temperature is around 25°C (77°F) and the water temperature is approximately 20°C (68°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!