Adamastor is a mythological character created by the Portuguese poet Luís de Camões in his epic poem Os Lusíadas, as a personification of the Cape of Good Hope, symbolizing the dangers of the sea and the formidable forces of nature challenged and ultimately overcome by the Portuguese during the Age of Discovery. Adamastor manifests itself out of a storm.

Os Lusíadas, usually translated as The Lusiads, is a Portuguese epic poem written by Luís Vaz de Camões and first published in 1572. It is widely regarded as the most important work of Portuguese-language literature and is frequently compared to Virgil's Aeneid. The work celebrates the discovery of a sea route to India by the Portuguese explorer Vasco da Gama (1469–1524). The ten cantos of the poem are in ottava rima and total 1,102 stanzas.