Grevillea acuaria is a species of flowering plant in the family Proteaceae and is endemic to the south-west of Western Australia.

It is a rounded, bushy to erect shrub with spreading linear to narrowly elliptic leaves and red flowers arranged in small clusters.

Grevillea acuaria is a rounded, bushy to erect shrub that typically grows to a height of 0.2–1.5 m (7.9 in – 4 ft 11.1 in).

[3][4] Grevillea acuaria was first formally described in 1870 by George Bentham from an unpublished manuscript by Ferdinand von Mueller and the description was published in Flora Australiensis from material collected by James Drummond.

[7] This grevillea grows in a wide variety of habitats, often in winter-wet situations and is widespread in the Avon Wheatbelt, Coolgardie, Esperance Plains, Great Victoria Desert, Mallee, Murchison, Nullarbor and Yalgoo biogeographic regions of Western Australia.