Yenikoy, Turkey offers 6 beaches perfect for sunbathing, surfing, swimming, and more. Yenikoy, Istanbul, Turkey, is known for its historic waterfront mansions and the scenic Bosphorus views. The best time to travel to Yenikoy, Turkey, is from May to September, with average air temperatures around 25-30°C (77-86°F) and water temperatures around 22-26°C (72-79°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!