The waters in horseshoe-shape Chalong Bay are usually calm, as the entrance is guarded by Koh Lone and Koh Hae. It's not a scenic stop in itself—it's more of a working port than a beach. The reason to come is to see Wat Chalong. From the jetty you can charter boats or book one-day or half-day trips to Koh Hae, Koh Lone, and other nearby islands for snorkeling, diving, parasailing, and other activities (B750–B1,600).
Ao Chalong is a wide-open bay that is most frequently used as a jumping-off point for surrounding islands. Head for the pier where you can catch ferries to nearby islands. One road takes you from the northern end to the southern end of the bay.