From the Metropolitan Museum of Art, NYC:
During the summer of 1869, Monet and Renoir set up their easels at La Grenouillère, a boating and bathing resort on the Seine, not far from Paris. Monet noted on September 25, "I do have a dream, a painting, the baths of La Grenouillère, for which I have made some bad sketches, but it is only a dream. Renoir, who has just spent two months here, also wants to do this painting." Of their various depictions of the subject, this composition closely resembles one by Renoir in the Nationalmuseum, Stockholm.