For the light, the composition, the tones... Dreamy mood, takes me to the beach. The out of focus kid on foreground throws me directly to the mother with kids and into the sea.
Also, the strong waves seems to advise on the coming of fall and also pull the family out of it. Great image, maybe the best I've seen here today. The only thing I dislike is the mirror lens bokeh, but that's only a detail, it doesn't lessen the image at all.