Delightful beach, my first time here despite being a Mass native. Was not crowded on the Monday I visited, social distancing possible. The dunes are a meter or two high, making it possible to move behind them when the tide is highest. A few notes:

While the "depth" of the beach (dune-to-ocean) is sizeable at low tide, it collapses to a mere 3 meters at high tide anywhere other than the narrow section directly in front of the parking area. Plan accordingly.

The parking area is technically an overlook that also serves as parking for the Coast Guard's lighthouse museum across the street. As such, it is limited to 30 minutes! Beachgoers should park at one of several paid lots nearby, for which a courtesy shuttle (golf cart style) is provided.

The sand here is nice, a wee bit coarser than that on the north shore (as compared to, for example, Crane's Beach), but photogenic. As such, sandcastles with a moat will drain almost instantly.

The water currents here are strong. While not so much a beach concern, non-local boaters are recommended to avoid exiting/entering the channel anywhere other than the southern inlet. Quite a few local fishing vessels can be seen regularly plying the channel.

There are quite a few seals who bask here, mostly on the isolated southern tip of Nauset Beach peninsula. But a few curious ones come close to the beach. There are also some small crabs in the shallows. Remarkably, we saw one of the few Horseshoe crabs not self-servingly butchered by the Medical Industrial Complex.