Trakai, Lithuania offers 3 beaches perfect for sunbathing, surfing, swimming, and more. Trakai is known for its picturesque lakes and the historic Trakai Island Castle. The best time to travel to Trakai, Lithuania, is from June to August, when the average air temperature is around 20°C (68°F) and the water temperature is approximately 18°C (64°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!