Yes, the Florida Keys are seasonally impacted by the Great Atlantic Sargassum Belt, a massive "blob" of brown seaweed that frequently washes ashore in 2026. Because the Keys are situated within the path of the Gulf Stream and Caribbean currents, they are often the first major landing point for sargassum in the United States. While the seaweed is ecologically beneficial as a floating habitat for marine life, it becomes a nuisance when it piles up on beaches and begins to decompose, releasing a "rotten egg" smell (hydrogen sulfide). In early 2026, researchers have predicted another major sargassum year, with significant beaching events expected to peak between April and July. While upscale resorts in the Keys often rake their private beaches daily to keep them clear for tourists, more remote or natural coastlines may see thick layers of the "blob" during the height of the summer season.