Sizing Up the Sargassum Belt
That trend, underway since 2011, continued in 2026 as the algae, commonly known as a type of seaweed, reached its annual peak in June across a stretch of ocean known as the Great Atlantic Sargassum Belt. The belt’s Sargassum abundance in June 2026 made it the second-highest Sargassum year in the satellite record, slightly behind 2025, according to scientists at the University of South Florida (USF) College of Marine Science. Regionally, the Caribbean Sea and the Gulf of America (Gulf of Mexico) both hit record highs, according to USF’s June 2026 Sargassum outlook.
- ▪That trend, underway since 2011, continued in 2026 as the algae, commonly known as a type of seaweed, reached its annual peak in June across a stretch of ocean known as the Great Atlantic Sargassum Belt.
- ▪The belt’s Sargassum abundance in June 2026 made it the second-highest Sargassum year in the satellite record, slightly behind 2025, according to scientists at the University of South Florida (USF) College of Marine Science.
- ▪Regionally, the Caribbean Sea and the Gulf of America (Gulf of Mexico) both hit record highs, according to USF’s June 2026 Sargassum outlook.
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| Original publisher | NASA |
| Canonical URL | https://science.nasa.gov/earth/earth-observatory/sizing-up-the-sargassum-belt/ |
| Publication time | Wed, 29 Jul 2026 04:00:00 +0000 |
| Retrieval time | 2026-07-29T04:44:06.884Z |
| Last seen | 2026-07-29T04:44:06.884Z |
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Earth ObservatoryScienceEarth ObservatorySizing Up the Sargassum BeltEarthEarth ObservatoryImage of the DayEO ExplorerTopicsAll TopicsAtmosphereLandHeat & RadiationLife on EarthHuman DimensionsNatural EventsOceansRemote Sensing TechnologySnow & IceWaterMore ContentCollectionsGlobal MapsWorld of ChangeArticlesEarth Matters BlogBlue Marble: Next GenerationEO KidsMission: BiomesAboutAbout UsSubscribe🛜 RSSContact UsSearch 6 min readSizing Up the Sargassum BeltImage of the Day for July 29, 2026Seaweed composing the Great Atlantic Sargassum Belt hit near-record levels in June 2026, with the Caribbean Sea and Gulf of America both reaching all-time highs.NASA Earth ObservatoryJul 29, 2026 Article View more Images of the Day:Jul 28, 2026Instruments:Aqua — MODISTerra — MODISPACECollections:Science…
Excerpt limited to ~120 words for fair-use compliance. The full article is at NASA.