Morne Rouge, Grenada offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Morne Rouge, Saint George, Grenada, is known for its picturesque Grand Anse Beach. The best time to travel to Morne Rouge, Grenada, is from December to April, with average air temperatures around 82°F (28°C) and water temperatures near 80°F (27°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!