Cross Lake, Ireland offers 1 beach perfect for sunbathing, surfing, swimming, and more. Cross Lake, Connaught, Ireland, is known for its scenic beauty and outdoor recreational activities such as fishing and hiking. The best time to travel to Cross Lake, 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!