Tha Thewawong, Thailand offers 1 beach perfect for sunbathing, surfing, swimming, and more. Tha Thewawong is known for Koh Sichang, a picturesque island with beautiful beaches and historical sites. The best time to travel to Tha Thewawong, 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!