Agios Isidoros, Greece offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Agios Isidoros, Central Greece, Greece, is known for its proximity to the historic site of Delphi. The best time to travel to Agios Isidoros, 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!