Walled Lake, United States offers 1 beach perfect for sunbathing, surfing, swimming, and more. Walled Lake is known for Walled Lake Beach and Mercer Beach, which are popular spots for outdoor recreation and community events. The best time to travel to Walled Lake, United States, is during the summer months of June to August, when the average air temperature is around 70-80°F and the water temperature is approximately 70°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!