Au Leon, Saint Lucia offers 1 beach perfect for sunbathing, surfing, swimming, and more. Dennery, Saint Lucia, is known for the Dennery Fish Festival and the Dennery Segment music genre. The best time to travel to Au Leon, Saint Lucia, 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!