Massive amounts of marine foam covered the beaches of Necochea and Quequén on Friday after a severe storm hit the region [1].
The phenomenon highlights the intensity of the recent weather system, which transformed the coastline into a landscape resembling snow. This event drew significant attention from local residents and tourists as the foam blanketed the sand following a period of violent weather [2].
The accumulation was caused by an extratropical cyclone, known locally as a "sudestada," which generated powerful winds and heavy rainfall [3]. These conditions agitated the ocean, churning organic matter into a thick, natural foam that was pushed ashore by the storm surge [4].
Weather reports indicated that the storm brought wind gusts of up to 100 km/h [5]. The force of the wind and the resulting sea state contributed to the scale of the foam deposits, which were reported on May 9, 2026 [6].
Local reports described the scene as an otherworldly environment, with some comparing the white expanse to a snowy landscape on the Buenos Aires province coast [7]. While the foam is a natural occurrence resulting from the agitation of seawater and organic proteins, the sheer volume seen during this event was notable [1].
Authorities and residents monitored the impact of the sudestada, which caused various damages across different sectors of Necochea and Quequén [8]. The combination of a low-pressure system and strong southeastern winds created the ideal conditions for this specific coastal phenomenon to occur [3].
“The phenomenon highlights the intensity of the recent weather system, which transformed the coastline into a landscape resembling snow.”
The appearance of thick marine foam is typically a result of high organic concentrations in the water being whipped by strong winds. When an extratropical cyclone like the sudestada occurs, the mechanical energy of the wind and waves acts as a blender, creating stable bubbles that accumulate on the shore. This event serves as a visual indicator of the storm's intensity and the specific atmospheric conditions affecting the Argentine Atlantic coast.
