Londonderry, Saint Lucia offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Laborie is known for its beautiful beaches and authentic Caribbean charm. The best time to travel to Londonderry, 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!