Coolie Town, Saint Lucia offers 1 beach perfect for sunbathing, surfing, swimming, and more. Castries is known for the Castries Market and Derek Walcott Square. The best time to travel to Coolie Town, Saint Lucia, is from December to April, with average air temperatures around 80°F (27°C) and water temperatures near 79°F (26°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!