Foster Hall, Barbados offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Diamond Valley, Saint Philip, Barbados, is known for the historic Sunbury Plantation House and the scenic Crane Beach. The best time to travel to Foster Hall, Barbados, is between December and April, when the average air temperature is around 27°C (81°F) and the water temperature is approximately 26°C (79°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!