Moses Lake, United States offers 3 beaches perfect for sunbathing, surfing, swimming, and more. Moses Lake is known for the Moses Lake Sand Dunes and the Surf 'n Slide Water Park. The best time to travel to Moses Lake is in late spring or early fall when the average air temperature is around 70-80°F and the water temperature is approximately 65-70°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!