Glengragara, Ireland offers 1 beach perfect for sunbathing, surfing, swimming, and more. Glengragara is known for the Glengragara Castle and the annual Glengragara Music Festival. The best time to travel to Glengarriff, Ireland, is from May to September, with average air temperatures around 15-20°C (59-68°F) and water temperatures around 12-16°C (54-61°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!