Moni Katharon, Greece offers 1 beach perfect for sunbathing, surfing, swimming, and more. Moni Katharon, Ionian Islands, Greece, is known for the Monastery of Panagia Kathariotissa, a significant religious site offering panoramic views of the island of Ithaca. The best time to travel to Moni Katharon, Greece, is from May to September, with average air temperatures ranging from 75°F to 85°F and water temperatures around 73°F to 79°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!