Tambon Hat Sai Ri, Thailand offers 3 beaches perfect for sunbathing, surfing, swimming, and more. Tambon Hat Sai Ri, Chumphon, Thailand, is known for the Prince of Chumphon Shrine and Hat Sai Ri Beach. The best time to travel to Tambon Hat Sai Ri, Thailand, is from November to February, with average air temperatures around 25-30°C (77-86°F) and water temperatures around 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!