Peder Severin Krøyer (1851-1909) – Boys Bathing at Skagen. Summer evening Kobenhavn (SMK) National Gallery of Denmark

The picture has something of this: water, beach, sea, ocean, sunset, dawn, seashore, people, sun, recreation, sand, landscape, surf, reflection, leisure, swimming, fair weather, outdoors.
Perhaps it’s a painting of a man and a woman sitting on the beach in front of the ocean with a sailboat in the distance and a full moon in the sky.