Ganniv More, Ireland offers 1 beach perfect for sunbathing, surfing, swimming, and more. Ganniv More, Munster, Ireland, is known for the scenic beauty of the Galtee Mountains and the historic Rock of Cashel. The best time to travel to Ganniv More, Ireland, is from June to August, when the average air temperature is around 15-20°C (59-68°F) and the 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!