Klai, Thailand offers 3 beaches perfect for sunbathing, surfing, swimming, and more. Klai, Nakhon Si Thammarat, Thailand, is known for Wat Phra Mahathat Woramahawihan. The best time to travel to Krabi, Thailand, is from November to March, with average air temperatures around 28°C (82°F) and water temperatures near 29°C (84°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!