Cappuccino Coast, Cape Town, South Africa

It is called Cappuccino coast. Because it doesn’t occur very often, you are a lucky one to see these pictures taken in Cape Town, as Cappuccino was brought to its shores by the strongest storm. This thick foam in the ocean appears when salt water interacts with the decomposition products of underwater living creatures, and everything is churned up together by powerful currents which cause the water to form bubbles.
Sea foam, ocean foam, or beach foam is a type of foam created by the agitation of seawater, particularly when it contains higher concentrations of dissolved organic matter (including proteins, lignins, and lipids) derived from sources such as the offshore breakdown of algal blooms. These compounds can act as surfactants or foaming agents. As the seawater is churned by breaking waves in the surf zone adjacent to the shore, the presence of these surfactants under these turbulent conditions traps air, forming persistent bubbles which stick to each other through surface tension. Due to its low density and persistence, foam can be blown by strong on-shore winds from the beachface inland onto sidewalks and streets.