Melres, Portugal offers 1 beach perfect for sunbathing, surfing, swimming, and more. Melres, Porto, Portugal, is known for its proximity to the Douro River and the scenic landscapes surrounding it. The best time to travel to Melres, Portugal, is from June to September, when the average air temperature is around 75°F (24°C) and the water temperature is approximately 68°F (20°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!