The Water-Sprite and Ägir’s Daughters Nils Blommér (1816-1853)

The picture has something of this: water, sky, dawn, storm, landscape, outdoors, sunset, evening, daylight, people, ocean, seashore, dusk, sea, scenic, weather, mountain.
Perhaps it’s a painting of a man playing a harp on a rock in the middle of a body of water with a castle in the distance in the background.