Monrovia, Liberia offers 3 beaches perfect for sunbathing, surfing, swimming, and more. Monrovia is known for the National Museum of Liberia and Providence Island. The best time to travel to Monrovia, Liberia, is from December to February, 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!