Duddestown, Ireland offers 1 beach perfect for sunbathing, surfing, swimming, and more. Duddestown is known for the historic Duddestown Castle and the annual Duddestown Music Festival. The best time to travel to Duddestown, Ireland, is from May to September, with average air temperatures ranging from 50-65°F (10-18°C) and water temperatures around 55-60°F (13-16°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!