Wildcat Lake, United States offers 1 beach perfect for sunbathing, surfing, swimming, and more. Wildcat Lake, Washington, United States, is known for Wildcat Lake Park, which offers opportunities for swimming, fishing, and picnicking in a scenic natural setting. The best time to travel to Wildcat Lake, United States, is during the summer months of June to August, when the average air temperature is around 75°F (24°C) and the water temperature is approximately 70°F (21°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!