Sargassum breaks records in 2026, inundating Mexican Caribbean beaches

The Mexican Caribbean is grappling with a sargassum crisis of historic proportions in 2026, as an estimated 90,538 tons of the seaweed traverse the region daily. This figure more than doubles the historical average, with nearly 10% directly impacting the coasts of Quintana Roo.

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The law speaks of moving, saving a monument, never tearing it down.

Authorities and specialists report significant consequences for the region's vital tourism industry, delicate ecosystems like coral reefs and mangroves, and even public health. In peak periods, Quintana Roo's shores receive up to 9,054 tons daily, a stark contrast to the average of 4,000 tons or the low presence of 2,640 tons. The Secretary of Environment and Natural Resources, Alicia Isabel Adriana Bárcena Ibarra, noted that this year's quantity is four times greater than in 2025 and 27 times higher than the historical average.

Rosa Elisa Rodríguez Martínez, from the National Autonomous University of Mexico's Institute of Marine Sciences and Limnology, described the phenomenon as one of the region's most significant environmental crises, with far-reaching ecological, economic, social, and health implications. Sargassum first began proliferating extraordinarily in 2011, and by 2014, its presence spread across the Caribbean, Gulf of Mexico, and the coasts of various countries in the Americas and Africa, forming the Great Atlantic Sargassum Belt.

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this year the quantity was four times greater than in 2025 and 27 times superior to the historical average.

Recent data from the Mexican Navy indicates the problem persists, with 18,229 tons recorded in the Mexican Caribbean as of August 6. Scientists link the formation and growth of the sargassum belt to shifting wind and ocean circulation patterns, alongside increased nutrient levels, particularly nitrates and phosphates, in the tropical Atlantic. Satellite observations from the University of South Florida's Optical Oceanography Laboratory reveal a sustained growth trend, with sargassum biomass in the Atlantic increasing from 63 million tons in 2018 to 214 million in 2025. While total Atlantic biomass remained similar between April and July of 2026 compared to 2025, the western Caribbean saw a considerable rise, with biomass jumping from approximately one million tons in April 2025 to four million in April 2026.

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one of the greatest environmental crises that the region has faced, with ecological, economic, social, and health consequences.