Nafplio, Greece offers 4 beaches perfect for sunbathing, surfing, swimming, and more. Nafplio is known for its historical landmarks such as Palamidi Fortress, Bourtzi Castle, and Syntagma Square. The best time to travel to Nafplio, Greece, is from May to June, with average air temperatures around 25°C (77°F) and water temperatures around 20°C (68°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!