Sai Thai, Thailand offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Sai Thai, Krabi, Thailand, is known for its proximity to the famous Railay Beach and the stunning limestone cliffs of Ao Nang. The best time to travel to Sai Thai, Thailand, is from November to February, with average air temperatures around 25-30°C (77-86°F) and water temperatures about 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!