Clumps and mats of sargassum have exploded in volume, now amounting to a near-record 29 million metric tons of seaweed floating in the Atlantic and Gulf of Mexico. Since early June, large quantities have washed ashore along Florida's coasts, from the eastern seaboard down through Miami and the Keys, and as far north as Perdido Key in northwest Florida.
The University of South Florida's Optical Oceanography Lab has been tracking sargassum growth year-round. Researchers there predict that 2026 could be a record year for the seaweed, with volumes potentially exceeding all previous measurements by summer's end.
What the Left Is Saying
Environmental advocates point to climate change and warming ocean temperatures as drivers of the expanding problem. The Environmental Protection Agency notes that sargassum can leach pollutants including pesticides and heavy metals when it decomposes on shore.
"These blooms are getting larger and more frequent," said Dr. Maria Santos, a marine biologist at Florida International University. "Warmer waters provide ideal conditions for rapid growth."
Public health groups have highlighted the risks posed by hydrogen sulfide and ammonia released as the seaweed rots. The Florida Department of Health has issued guidance recommending beachgoers avoid touching or swimming near sargassum mats, use gloves when handling the material, and keep windows closed if living near affected beaches.
What the Right Is Saying
Local officials in coastal communities have focused on practical response efforts rather than climate discussions. Beach managers and tourism officials emphasize that proactive monitoring and removal operations are key to protecting both residents and visitors.
"We're deploying extra crews to clear affected areas as quickly as possible," said a spokesperson for Miami-Dade County's environmental services department. "Our priority is keeping beaches safe and open for residents and tourists."
Some coastal leaders in Texas and Louisiana have begun reviewing their beach management protocols in anticipation of the seaweed reaching Gulf shores later this summer.
What the Numbers Show
The current Atlantic sargassum volume stands at approximately 29 million metric tons, approaching record levels. The University of South Florida's Optical Oceanography Lab has documented significant increases year-over-year since tracking began.
Health effects from exposure to rotting sargassum include respiratory issues for sensitive individuals, headaches, nausea, and vertigo with prolonged contact. Small organisms such as jellyfish often inhabit the floating mats, posing additional skin irritation risks.
The National Oceanic and Atmospheric Administration has monitored Gulf currents that typically carry Atlantic seaweed into Gulf waters during summer months, a pattern researchers expect to repeat in 2026.
The Bottom Line
Beaching events along Florida's coasts will likely continue through the summer as sargassum volumes remain elevated. Texas and Louisiana beaches face increasing risk of similar impacts as currents push the seaweed deeper into the Gulf of Mexico.
Residents living near affected beaches should monitor guidance from local health departments, particularly regarding air quality concerns for sensitive groups. Those planning beach visits should check with local authorities about current conditions before traveling.