Hoorn, Ireland offers 4 beaches perfect for sunbathing, surfing, swimming, and more. Hoorn, the city is known for its historic harbor and the Westfries Museum. Hoorn is not in Ireland; it is in the Netherlands, and the best time to visit is from June to August when the average air temperature is around 20°C (68°F) and water temperature is about 17°C (63°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!