Nea Agchialos, Greece offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Nea Agchialos is known for its proximity to the archaeological site of Ancient Thebes and the beautiful beaches along the Pagasetic Gulf. The best time to travel to Nea Agchialos, Greece, is from May to September, with average air temperatures ranging from 75°F to 85°F and water temperatures from 70°F to 78°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!