Olhao, Portugal offers 1 beach perfect for sunbathing, surfing, swimming, and more. Olhao is known for the Ria Formosa Natural Park and its traditional fish market. The best time to travel to Olhao, Portugal, is from May to September, when the average air temperature is around 25°C (77°F) and the water temperature is approximately 21°C (70°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!