Portmarnock, Ireland offers 4 beaches perfect for sunbathing, surfing, swimming, and more. Portmarnock is known for the Portmarnock Golf Club and its beautiful sandy beach. The best time to travel to Portmarnock, Ireland, is from June to August, when the average air temperature is around 15-20°C (59-68°F) and the sea temperature is approximately 14-16°C (57-61°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!
