Porto Ennia, Greece offers 1 beach perfect for sunbathing, surfing, swimming, and more. Porto Ennia, Attica, Greece, is known for its proximity to the ancient site of Sounion and the Temple of Poseidon. The best time to travel to Porto Ennia, Greece, is from late May to early October, with average air temperatures around 75°F (24°C) and water temperatures near 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!