Dark, jagged rocks jut from a churning blue-green sea under a heavy violet sky. The largest rock mass sits just left of centre, its rough surface rendered in deep browns and blacks, surrounded by swirling white foam where the waves crash against it. To the right, a cluster of darker rocks forms a barrier that stretches toward the horizon, their shapes softened by the mist and spray of the stormy weather.

The water is painted with energetic, sweeping strokes of blue, turquoise, and white, capturing the movement and turbulence of the sea in the rain. Near the bottom edge, the brushwork becomes especially lively, with thick, curving strokes suggesting the restless surface of the water and the play of light on the waves. Across the middle ground, smaller rocks emerge from the foam, their forms less distinct as they recede into the distance and blend with the hazy atmosphere.

The sky above is filled with broad, horizontal strokes of lavender and grey, evoking the weight of rain clouds and the diffuse light of a stormy day. There are no figures or signs of human presence, emphasizing the wildness and isolation of the coastal scene. The composition is divided horizontally, with the restless sea occupying the lower two-thirds and the brooding sky pressing down from above.

The artist's signature appears in the lower left corner, integrated into the brushwork along the water's edge. Claude Monet created Belle-Ile, Rain Effect in 1886. The Artizon Museum lists the work among its holdings, attributing it to Monet and dating it to the same year. Monet applies paint in rapid, visible strokes, building up texture to convey the force of wind and water against the rocks.

The colour palette is dominated by cool blues and purples, with the dark rocks providing strong contrast and anchoring the composition. The absence of a clear horizon and the merging of sea and sky heighten the sense of atmosphere and the effect of rain.