Carpobrotus quadrifidus (commonly known as west-coast sourfig, Weskus suurvy) is a succulent perennial of the family Aizoaceae, native to the west coast of South Africa.

The flowers are typically a bright pink colour, although some white-flowered forms can be found in the far northern limits of its distribution range.

They leaves are glaucous-grey in colour, and have a distinctive smooth, hard, firm-textured surface, with cartilaginous margins.

The leaves are erect and relatively straight (or only slightly acinaciform), and have an isosceles triangle shape to their cross-section.

In Cape Town, to the south of its natural distribution range, it transitions into the related species Carpobrotus acinaciformis.