Martin City, United States offers 1 beach perfect for sunbathing, surfing, swimming, and more. Martin City, Montana, United States, is known for its proximity to Glacier National Park. The best time to travel to Martin City, United States, is in late spring (May to June) when the average air temperature is around 65-75°F and water temperature in nearby lakes is approximately 55-65°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!