Marianna, United States offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Marianna, Arkansas, United States, is known for the St. Francis National Forest and the Mississippi River State Park. The best time to travel to Marianna, United States, is in the spring (March to May) when the average air temperature is around 70-80°F, and water temperatures in nearby springs are consistently around 68°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!