Johnstown, Ireland offers 1 beach perfect for sunbathing, surfing, swimming, and more. Johnstown, Leinster, Ireland, is known for the Johnstown Castle Estate, Museum & Gardens. The best time to travel to Johnstown, Ireland, is from May to September, with average air temperatures ranging from 50°F to 68°F and water temperatures around 55°F to 60°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!
