Here's my CC-at-the-beach trick
OK, I'm not gonna get involved in the whole debate about needing to carry on a beach. I've walked some mean streets and some idyllic beaches, and I know that crime is attracted to areas of low resistance, and that a threat can pop up anywhere, anytime.
But I can certainly tell you how to carry on a beach, and I'm surprised nobody else has mentioned this so far. I've written about this method before, on another, similar firearms forum (from which I've been banned forever, but not for remarks on this topic).
Get yourself a Tilley Hat (made in Canada) or its American-made clone, the Ultimate Hat. Both come in several variations of color, fabric, brim size etc., but all have a pocket inside the crown. And I can personally testify that a .380 Backup or a Colt Mustang will fit very nicely in that pocket. Any other gun with a similar footprint will probably also fit.
You can go into the water up to your eyebrows and your gun will be dry and accessible. The hats are rigged with cords you can put under your chin and behind your head, to not only keep the hat on in a high wind (these hats are favored by sailboaters) but will also keep it from being easily snatched off your head.
I carried in this manner when I frequented a nude beach outside Portland, OR back in the '80s. Nudity notwithstanding, it was a very civilized, wholesome and family-friendly beach, but there were still times I was happy to be armed, as when groups of drunk and belligerent guys would come up in small boats and harass the women.