Bang Son, Thailand offers 1 beach perfect for sunbathing, surfing, swimming, and more. Bang Son, Chumphon, Thailand, is known for its proximity to the Mu Ko Chumphon National Park and the beautiful beaches of Thung Wua Laen. The best time to travel to Bang Son, Thailand, is from November to February, when the average air temperature is around 25-30°C (77-86°F) and the water temperature is approximately 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!