Irmakkoy, Turkey offers 1 beach perfect for sunbathing, surfing, swimming, and more. Irmakkoy, Kastamonu, Turkey, is known for its proximity to the Valla Canyon and the Ilgarini Cave. The best time to travel to Irmakkoy, Turkey, is from May 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!