秘鲁凉流，旧称洪堡凉流，南太平洋东部凉流，是一个低盐度的洋流，沿南美洲西岸从智利南端伸延至秘鲁北部，于南纬10°以北偏向西行，构成南太平洋南赤道海流的补偿流。

在北端可伸延至离岸1,000千米，其影响甚至可达科隆群岛。秘鲁凉流大海洋生态系是一个重要的上升流系统，支持大量海洋生物，全世界每年渔获量的17%-20%来自该生态系。

秘鲁凉流是导致智利北部、秘鲁沿海地区和厄瓜多尔尔南部干旱的重要原因：向岸风被凉流冷却，不能造成降水。

The Humboldt Current is a cold, low-salinity ocean current that flows north along the west coast of South America from the southern tip of Chile to northern Peru. Also called the Peru Current, it is an eastern boundary current flowing in the direction of the equator, and can extend 1,000 kilometers offshore. The Humboldt Current Large Marine Ecosystem (LME), named after the Prussian naturalist Alexander von Humboldt, is one of the major upwelling systems of the world, supporting an extraordinary abundance of marine life. Upwelling occurs off Peru year-round but off Chile only during the spring and summer, because of the displacement of the subtropical center of high pressure during the summer.