A Summer at Grandpa's (Chinese: 冬冬的假期; pinyin: Dōngdōng de jiàqī) is a 1984 Taiwanese coming-of-age family drama directed by Hou Hsiao-hsien and co-written with Hou by Chu Tʽien-wen. The film tells the semi-autobiographical exploits of a young brother and sister who spend a pivotal summer in the country with their grandparents while their mother is in critical care in the hospital.

The film was Hou's sixth overall, and first after his international breakthrough The Boys from Fengkuei (1983).

A Summer at Grandpa's was well received by critics in Taiwan and on the American and European festival circuits, winning the Jury Prize at the Locarno Film Festival in 1985 and the Golden Montgolfier at the 1985 Nantes Three Continents Film Festival.