Poros, Greece offers 9 beaches perfect for sunbathing, surfing, swimming, and more. Poros, Attica, Greece, is known for its picturesque harbor, the Clock Tower, and the Archaeological Museum of Poros. The best time to travel to Poros, 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!