Mountlake Terrace, United States offers 1 beach perfect for sunbathing, surfing, swimming, and more. Mountlake Terrace is known for the Ballinger Park and Lake Ballinger, which offer recreational activities and scenic views. The best time to travel to Mountlake Terrace, United States, is during the summer months of July and August, when the average air temperature is around 70°F (21°C) and the water temperature in nearby lakes is approximately 65°F (18°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!