In People on the Beach at Trouville, Eugène Boudin captures a lively beach scene filled with sunbathers and children playing. The colors are bright and cheerful, with blues of the sky and sea contrasting with the warm tones of the sand and figures. The figures are dressed in fashionable 19th-century attire, adding a sense of elegance to the scene.

The overall atmosphere is one of leisure and enjoyment, typical of summer days at the beach. This painting is executed in oil on canvas, a medium that allows for rich color and texture. Boudin's brushwork is loose and expressive, characteristic of the Impressionist style. The composition is dynamic, with figures arranged in a way that leads the viewer's eye across the canvas.

The use of light and shadow enhances the three-dimensionality of the scene. Eugène Boudin is often considered a precursor to the Impressionist movement, and this work exemplifies his ability to capture the effects of light and atmosphere. Interestingly, Boudin was one of the first artists to paint en plein air, or outdoors, which greatly influenced his style. This particular painting was created during a time when Trouville was becoming a popular seaside resort for the Parisian elite.

Boudin's focus on everyday life at the beach reflects the changing social dynamics of the time.