Terkos, Turkey offers 1 beach perfect for sunbathing, surfing, swimming, and more. Terkos, Istanbul, Turkey, is known for Terkos Lake, a popular destination for nature enthusiasts and bird watchers. The best time to travel to Terkos, Turkey, is from June to September, when the average air temperature is around 25°C (77°F) and the water temperature is approximately 22°C (72°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!