Sili, Samoa offers 1 beach perfect for sunbathing, surfing, swimming, and more. Sili, Manu'a, Samoa, is known for its proximity to the National Park of American Samoa, which offers stunning natural landscapes and unique wildlife. The best time to travel to Sili, Samoa, is between May and October, when the average air temperature is around 77-86°F (25-30°C) and the water temperature is approximately 80-82°F (27-28°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!