Lemnos, Greece offers 4 beaches perfect for sunbathing, surfing, swimming, and more. Lemnos is known for its ancient site of Hephaistia, the Castle of Myrina, and the stunning beaches of Thanos and Plati. The best time to travel to Lemnos, Greece, is from June to September, when the average air temperature is around 25-30°C (77-86°F) and the water temperature is approximately 22-25°C (72-77°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!