Dikastika, Greece offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Dikastika is known for its proximity to the archaeological site of Marathon and the Marathon Run Museum. The best time to travel to Dikastika, Greece, is from late May to early October, with average air temperatures ranging from 75°F to 85°F and water temperatures from 72°F to 79°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!