James Tissot, Seaside (July: Specimen of a Portrait), 1878
From the Cleveland Museum of Art:
This painting belongs to a series of allegories representing various months of the year. The sitter’s relaxed pose and the distant beach suggest a summer vacation by the sea. Bright sunlight is reflected off the sand and filtered through the awning into the room, where it rebounds from the woman’s ruffled dress onto her face. The model has been identified as Kathleen Newton, Tissot’s British mistress from 1876 until her death in 1882.