Guntersville, United States offers 1 beach perfect for sunbathing, surfing, swimming, and more. Guntersville is known for its beautiful lake and outdoor recreational activities. The best time to travel to Guntersville, United States, is in late spring (May), when the average air temperature is around 70°F (21°C) and the water temperature is approximately 68°F (20°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!