Does rain have any effect on forage items located on the beach? Like does rain help them spawn more frequently? I thought I read somewhere that it did, although I might be thinking of a Bokujou Monogatari game.
There is no indication that weather in general influences the spawning of beach forage. There is a brief period during the summer (you will get a show on 'Livin' Off the Land' about this in mid-summer, year one) when the spawning is increased due to a 'crab mating season' event, but that's the only variable to beach forage that I have heard of.
