Ireo, Greece offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Ireo is known for the Heraion of Samos, an ancient sanctuary dedicated to the goddess Hera. The best time to travel to Ireo, 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!