Chalong Bay Phuket Island Guide Thailand's best beaches Chalong Bay Phuket Beach Guide, Thailand Chalong Bay It's muddy shoreline makes Chalong unsuitable for swimming, but it's an ideal spot for yacht mooring. Outside of the marinas of Boat Lagoon and Yacht Haven, Chalong is a centre for activity in Phuket. Early mornings and late afternoons are the busiest times, where diving and day trip groups are seen