Rio Caldo, Portugal offers 1 beach perfect for sunbathing, surfing, swimming, and more. Rio Caldo is known for its stunning natural landscapes and proximity to the beautiful beaches of the Cávado River in Portugal. The best time to travel to Rio Caldo, Portugal, is during the summer months of June to August, when the average air temperature is around 25°C (77°F) and the water temperature in nearby reservoirs is approximately 22°C (72°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!