Indian Summer is an 1875 oil painting by Polish Realist painter Józef Chełmoński. It is considered one of the artist's most acclaimed works and is currently displayed at the National Museum in Warsaw, Poland.

The Warsaw National Museum, also known as the National Museum in Warsaw, is a national museum in Warsaw, one of the largest museums in Poland and the largest in the capital. It comprises a rich collection of ancient art, counting about 11,000 pieces, an extensive gallery of Polish painting since the 16th century and a collection of foreign painting including some paintings from Adolf Hitler's private collection, ceded to the museum by the American authorities in post-war Germany. The museum is also home to numismatic collections, a gallery of applied arts and a department of oriental art, with the largest collection of Chinese art in Poland, comprising some 5,000 objects.