Marble Hill, Ireland offers 1 beach perfect for sunbathing, surfing, swimming, and more. Marble Hill, Ulster, Ireland, is known for Marble Hill Beach and the nearby Glenveagh National Park. The best time to travel to Marble Hill, Ireland, is during the summer months of June to August, when the average air temperature is around 15-20°C (59-68°F) and the average water temperature is approximately 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!