Idra, Greece offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Idra is known for its picturesque harbor, historic mansions, and the Leonard Cohen connection. The best time to travel to Idra, Greece, is from May to September, with average air temperatures ranging from 70 to 85°F (21 to 29°C) and water temperatures from 68 to 77°F (20 to 25°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!