Acacia stenophylla is a fast-growing tree, that grows to 4–10 metres (13–33 ft) tall. The form is upright with decumbent or weeping branches and foliage. The leaves are gray to gray-green, narrow and long.
Acacia stenophylla has medium salt and frost tolerance. The average minimum annual rainfall that the tree needs is around 400mm/yr. It is not listed as a threatened species.