Foz do Sousa, Portugal offers 1 beach perfect for sunbathing, surfing, swimming, and more. Foz do Sousa is known for its scenic river views and proximity to Porto's vibrant cultural attractions. The best time to travel to Foz do Sousa, Portugal, is during late spring to early autumn (May to September), when the average air temperature ranges from 18°C to 28°C (64°F to 82°F) and the water temperature is around 16°C to 20°C (61°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!