Koundouros, Greece offers 1 beach perfect for sunbathing, surfing, swimming, and more. Koundouros is known for its beautiful beaches and traditional Cycladic architecture. The best time to travel to Koundouros, Greece, is from June to September, when the average air temperature is around 80°F (27°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!