We don't have much in the way of waves, but we do have a full moon and some low tides that should give you a good opportunity for some low tide hunting. I think that will be the best shot until the waves pick up again, which probably won't be until after the weekend.
At the end of this post I have a lead from an old book. The photo above I've shown before, but I brought it back because I decided to talk about the Rio Mar site where this coin was found. A few days ago I gave you the address of a report that said that the Rio Mar beach has been in an accretion phase since the 1800s. (You can see a relatively recent photo of that beach by going back to my February 20, 2008 post.)
The coin shown in the photo came from the foot of the eroded back dune after the waves had recently eroded the back dune. I think you can tell from the sharp lines on the coin that it hasn't been tumbled in the surf. The black patina shows that it has been in salt water, even if only since being washed out of the dune. I am pretty sure that this coin had recently washed out of the dune when it was found.
Rio Mar is a crenate bay, which means that it has something of the shape of a cup or half moon. In the water just off shore are some rocky ridges that can be seen sometimes at low tide. Regardless of the continual erosion over years, there have been times when the beach was cut further back than shown in the February photo. Just under the sand there were some large concrete blocks under what I would call the middle and back beach. To the north of the bay, were large constructions meant to slow or stop the erosion. Both the blocks and erosion control devices have been exposed in years past when the beach was more eroded. If they haven't been moved, they are covered now and the beach is considerably higher and extends out over some of the rocky ridges in the water that used to show at times.
I divide the beach into three sections. The front beach, comprised of the sand that is frequently wet under even moderate tides and waves and that slopes up to a relatively flat area, the relatively flat and normally dry sand, and the back beach, comprised of the cliff, dunes, and a few feet of sand in front of that.
The back beach, when eroded, and that does not often happen, generally gives up coins and materials that have spent a long time (maybe as long as they've been there) in basicly dry sand. The middle beach primarily generally gives up relatively recent and some older but yet modern era coins and artifacts that were dropped pretty cloe to where they are found. And the front beach gives up coins that have been in the ocean or tumbled in the surf or are in the process of being moved towards the water.
Exceptions do occur but it takes a significant amount of wave energy and sand movement to make that happen. If the waves have been hitting the back dunes on a beach of any width, the rest of the beach has been subject to a lot of force and not only can a lot of the middle beach sand be moved, but objects from the front beach, as well as the back beach, can be moved onto the eroded middle beach and in some cases back to the foot of the dunes.
One thing that helps that movement to happen, is the level of the middle beach, which when eroded is lowered to closer that of sea level. The level of the eroded beach I think is something that has not been talked about much, and I am coming to believe is a significant factor, especially when talking about movement of denser materials such as precious metals.
Referring to the photo of the Rio Mar site once again, you can see a small cut towards the front of the middle beach. The level has not been reduced to previous levels that in the past exposed the concrete slabs. The back dunes have obviously not been eroded for some time. The beach, is in an accretion phase, even though there is a little erosion in the recently deposited sand. When the front and middle beach was cut down further and back further towards the dunes, it produced older coins and jewelry.
Like the areas north of the jetties of the inlets, the built up sand in this little bay, in my opinion, probably covers artifacts from the past. If the Rio Mar site has been building up over a period of more than one hundred years as the study says, there is a good chance that part of the wreck lies under what I have called the middle beach. If it was further out in the ocean, blowers would be used to remove the sand, but since it is on the beach, it those items won't be exposed until and unless nature removes a lot of sand.
Before I close today, I'll give you a little lead from an old book. Here it is.

Let me hear what your finding or what you'd like to see in this blog.
TreasureGuide@comcast.net