“The Summer Knows” is considered one of the few jazz standards introduced after the 1950s. It is the theme music for the 1971 movie The Summer of ’42 and was composed by Michel Legrand.
The IMDb synopsis of the movie:
During his summer vacation on Nantucket Island in 1942, a youth eagerly awaiting his first sexual encounter finds himself developing an innocent love for a young woman awaiting news on her soldier husband’s fate in WWII.
I found a few covers: Art Farmer, Barbra Streisand, Sarah Vaughan, and Johnn Mathis. I am sure there are many more. I also discovered this one by alto sax great Art Pepper on his 1976 album The Trip.
After citing the intensity of Pepper’s playing and the “tentative cast” of the recording, AllMusic reviewer Chris Kelsey notes that Pepper’s playing on this album is first-rate, especially his interpretation of this cut, which, he writes, is on its own worth the price.