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Caribbean Beaches Drowning in Seaweed Tide
31 Jul
Summary
- Record sargassum blooms choke Caribbean and Gulf coastlines.
- Rotting seaweed fouls beaches, impacting tourism and marine life.
- Mexico invests $115 million to combat the growing algae threat.
As of July 2026, vast quantities of sargassum seaweed are inundating the beaches and coastlines of the Caribbean and Gulf of Mexico. A record 27 million metric tons of this algae were recorded in the Atlantic, Caribbean, and Gulf in July alone, significantly impacting local ecosystems and economies reliant on tourism.
This year marks an anomaly, with sargassum reproducing locally rather than being solely carried by currents from Western Africa. This new growth pattern, linked to factors like agricultural runoff and warming waters, stems from a record 40 million metric tons observed last year, creating a continuous bloom.
The economic impact is severe, with tourism-dependent towns like Playa del Carmen experiencing customer loss and hotel occupancy declines. Mexico has announced a $115 million investment to combat the algae, though its current capacity to collect it is limited.
Scientists predict that 2026 could be the second-largest year for sargassum recorded in the Atlantic, Caribbean, and Gulf of Mexico. The proliferation poses a growing hazard, not only to tourism but also to marine life and coastal environments, with potential severe health effects from the emitted gases.
