Tresaith, Ireland offers 4 beaches perfect for sunbathing, surfing, swimming, and more. Munster, Ireland, is known for the Cliffs of Moher and the Ring of Kerry. The best time to travel to Tresaith, Ireland, is during the summer months of June to August, when the average air temperature is around 60-65°F (15-18°C) and the water temperature is approximately 55-60°F (13-16°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!