Arklow, Ireland offers 4 beaches perfect for sunbathing, surfing, swimming, and more. Arklow is known for the Arklow Maritime Museum and the Avoca River. The best time to travel to Arklow, Ireland, is from June to August, when the average air temperature is around 15-20°C (59-68°F) and the water 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!