Grand Chenier, United States offers 1 beach perfect for sunbathing, surfing, swimming, and more. Grand Chenier is known for Rockefeller Wildlife Refuge, which attracts nature enthusiasts and birdwatchers. The best time to travel to Grand Chenier, United States, is in April 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!