Dublin, Ireland offers 22 beaches perfect for sunbathing, surfing, swimming, and more. Dublin is known for the Guinness Storehouse, Trinity College, and Temple Bar. The best time to travel to Dublin, 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!