Pomaderris forrestiana is a shrub that typically grows to a height of about. The leaves are elliptic, long and wide, on a petiole long. The upper surface is velvety-hairy and the lower surface is covered with grey, woolly, star-shaped hairs. The flowers are arranged in small groups in leaf axils and on the ends of branchlets, each flower on a hairy pedicel about long. The sepals are about long with grey, woolly, star-shaped hairs on the back and the petals are spatula-shaped and slightly shorter than the sepals. Flowering has been observed in July and September.