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《凱風快晴》（日語：凱風快晴／がいふうかいせい Gaifū kaisei）是葛飾北齋的名所繪《富嶽三十六景》之中的一幅，描繪的是富士山。

凱風快晴的作畫視點是在甲斐國或者駿河國，和《山下白雨》一樣描繪的是日本的富士山，畫面最下方是富士山的樹海，背景是藍天白雲，富士山頂還有殘留的雪渓。而紅色的富士山頂也一樣引人注目。就紅色的富士山而言，它可能描繪的是夏季早晨的赤富士，但有研究表明沒有任何可靠信息能證明畫中的景象發生於早晨

Fine Wind, Clear Morning (Japanese: 凱風快晴, Hepburn: Gaifū kaisei, literally South Wind, Clear Sky), also known as Red Fuji, is a wood block print by Japanese artist Hokusai (1760–1849), part of his Thirty-six Views of Mount Fuji series, dating from c. 1830 to 1832. The work has been described as "one of the simplest and at the same time one of the most outstanding of all Japanese prints".

In early autumn when, as the title specifies, the wind is southerly and the sky is clear, the rising sun can turn Mount Fuji red. Hokusai captures this moment with compositional abstraction but meteorological specificity, especially when compared to the rest of the series. The three shades of deepening blue of the sky mirror the three hues of the mountain. The lingering remnants of snow at the peak of the mountain and dark shadows encompassing the forest at its base place it very precisely in time. Mount Fuji's solidly symmetrical shape on the right half of the image is balanced by the delicate clouds to the left, for a striking composition.

There is however no specific location name unlike his other works, so the location from where the view was taken is a mystery.