Months after wrapping To Have and Have Not, Bogart and Bacall were reunited for an encore: the film noir The Big Sleep (1946), based on the novel by Raymond Chandler with script help from William Faulkner. Chandler admired the actor's performance: "Bogart can be tough without a gun. Also, he has a sense of humor that contains that grating undertone of contempt." Although the film was completed and scheduled for release in 1945, it was withdrawn and re-edited to add scenes exploiting Bogart and Bacall's box-office chemistry in To Have and Have Not and the publicity surrounding their offscreen relationship. At director Howard Hawks' urging, production partner Charles K. Feldman agreed to a rewrite of Bacall's scenes to heighten the "insolent" quality which had intrigued critics such as James Agee and audiences of the earlier film, and a memo was sent to studio head Jack Warner.
Bogart filed for divorce from Methot in February 1945. He and Bacall married in a small ceremony at the country home of Bogart's close friend, Pulitzer Prize-winning author Louis Bromfield, at Malabar Farm (near Lucas, Ohio) on May 21, 1945.
Bogart bought the Santana, a 55-foot (17 m) sailing yacht, from actor Dick Powell in 1945. He found the sea a sanctuary and spent about thirty weekends a year on the water, with a particular fondness for sailing around Catalina Island: "An actor needs something to stabilize his personality, something to nail down what he really is, not what he is currently pretending to be." Bogart joined the Coast Guard Temporary Reserve, offering the Coast Guard use of the Santana. He reportedly attempted to enlist, but was turned down due to his age.