Oropioi, Greece offers 1 beach perfect for sunbathing, surfing, swimming, and more. Oropioi is known for the Sanctuary of Amphiaraos, a significant archaeological site. The best time to travel to Oropioi, Greece, is from June to September, when the average air temperature is around 77°F (25°C) and the water temperature is approximately 75°F (24°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!