Dan Sawi, Thailand offers 4 beaches perfect for sunbathing, surfing, swimming, and more. Dan Sawi, 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 Dan Sawi, Thailand, is from November to February, with average air temperatures around 25-30°C (77-86°F) and water temperatures 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!