Calliste, Grenada offers 5 beaches perfect for sunbathing, surfing, swimming, and more. Calliste, Saint George, Grenada is known for Maurice Bishop International Airport and its proximity to Grand Anse Beach. The best time to travel to Calliste, Grenada, is from December to April, with average air temperatures around 27°C (81°F) and water temperatures near 28°C (82°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!