Chinamans Beach is one of the small, sheltered beaches strung along the White Sands Walk between Greenfield Beach in Vincentia and Hyams Beach. The Culture Trip describes it as a local snorkelling secret that generally attracts fewer snorkellers than its famous neighbours, and several visitor guides list it among the bay's snorkel spots.

The beach is bounded by low rocky reef at each end, with sand and seagrass between. The reef supports the usual western-shore community – blue groper, luderick, bream, leatherjackets, wrasse and small schooling fish – while rays and flathead forage on the sand and small creatures shelter in the seagrass. It is shallow, calm in the right weather and quiet, which makes it an appealing snorkel for families and a gentle shallow dive for those willing to carry gear along the track.

There is little scuba-specific documentation, so depths and detailed features are not published; treat it as an easy exploratory site. The walk-in keeps crowds down but also means no facilities on the beach itself – the nearest toilets and parking are at Greenfield Beach. Like the rest of the western shore it is best in westerly weather and becomes choppy in strong north-easterlies. It lies within the Jervis Bay Marine Park, so zoning rules apply. Combine it with Greenfield/Blenheim or Little Hyams for a relaxed day of snorkelling along the White Sands Walk. A float with a dive flag is recommended if scuba diving, as kayaks and small boats sometimes come close to shore. Water temperatures range from about 15 °C in late winter to 23 °C in late summer, so a 5–7 mm wetsuit is sensible for anything longer than a quick summer snorkel, and a hood helps from June to October.

Jervis Bay is about 2.5–3 hours south of Sydney via the M1 and Princes Highway, turning onto Jervis Bay Road at Falls Creek. Park at Greenfield Beach (Vincentia; parking, toilets, picnic area) and follow the White Sands Walk south to Chinamans Beach, or walk north from Hyams Beach. The walk is short but involves carrying gear along a bush track, so snorkel gear or a light scuba setup is most practical.

Enter from the sand and explore the rocks at either end.

Inside Jervis Bay the water is sheltered from ocean swell, but the bay is big enough for wind chop: strong north-easterlies (summer afternoons) make the western and southern shores choppy, and southerly or westerly winds affect the northern shore less. Diving is possible on most days of the year at one shore or another. Visibility is usually 8–15 m, better in winter, and drops after heavy rain when Currambene Creek and Moona Moona Creek flush tannin water into the bay.

Tides are small but high tide gives better visibility at the beach entries.

Snorkel or dive along the rocks at one end of the beach, cross the sand and seagrass, and explore the other end before returning to the beach.

No scheduled guided shore dives; Dive Jervis Bay and other Huskisson operators hire gear and give site advice, and occasionally run training or snorkel sessions.