Grande Montagne, Mauritius offers 4 beaches perfect for sunbathing, surfing, swimming, and more. Grande Montagne, Rodrigues, Mauritius, is known for the Francois Leguat Giant Tortoise and Cave Reserve. The best time to travel to Grande Montagne, Mauritius, is from May to December, with average air temperatures around 24-28°C (75-82°F) and water temperatures around 23-27°C (73-81°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!