Kato Diminio, Greece offers 1 beach perfect for sunbathing, surfing, swimming, and more. Kato Diminio is known for its proximity to the ancient archaeological site of Corinth. The best time to travel to Kato Diminio, Greece, is from May to September, with average air temperatures around 75°F (24°C) and water temperatures around 73°F (23°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!