Clifden, Ireland offers 1 beach perfect for sunbathing, surfing, swimming, and more. Clifden is known for the Sky Road, Connemara National Park, and the Clifden Castle. The best time to travel to Clifden, Ireland, is from May to September, when the average air temperature is around 15-18°C (59-64°F) and the average water temperature is about 12-15°C (54-59°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!