Barometer Rising is a romantic-realist novel by Canadian author Hugh MacLennan. The work explores life in Halifax, Nova Scotia during World War I, and its interruption by the Halifax explosion. The narrative predominantly follows and pivots upon the romantic life of Penny Wain. The book had been difficult to publish as MacLennan had previously written regarding international themes, while Barometer Rising contained a decidedly nationalist overtone. Once published, the novel was wildly successful, and permitted MacLennan to leave his full-time job at Lower Canada College.