Louisburgh, Ireland offers 4 beaches perfect for sunbathing, surfing, swimming, and more. Louisburgh, Connaught, Ireland, is known for the Great Western Greenway and the annual Granuaile Festival. The best time to travel to Louisburgh, Ireland, is from June to August, when the average air temperature is around 15-18°C (59-64°F) and the average sea temperature is about 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!