Does Costa Rica Get Sargassum?
Caribbean coast (Limon) and Pacific coast (Guanacaste, Central Pacific) · Costa Rica
Costa Rica's answer depends entirely on which coast you visit. The Caribbean side - Tortuguero, Barra del Colorado, Cahuita, Puerto Viejo, Punta Uva and Manzanillo - does get sargassum, and 2026 broke records there, with arrivals starting in February and continuing through June instead of the usual March-to-May window. The Pacific side - Guanacaste, Tamarindo, Nosara, Manuel Antonio, Uvita, the Osa Peninsula - gets essentially none, because sargassum is an Atlantic phenomenon and cannot reach the Pacific. Since roughly 80 percent of Costa Rica's beach tourism is on the Pacific, most visitors will never see sargassum at all.
Sargassum in Costa Rica by month
What to know before you book
- •The month ratings above describe the CARIBBEAN coast only. Every month on the Pacific coast (Guanacaste, Nicoya, Central Pacific, Osa) is 'none' - sargassum has never been a problem there, including the beaches near Liberia airport.
- •In 2026 MINAE reported sargassum accumulating on the northern Caribbean coast starting in early February, with the heaviest concentrations at Tortuguero, Barra del Colorado and Isla Calero near the Nicaragua border.
- •Southern Caribbean towns (Puerto Viejo, Playa Negra, Punta Uva, Manzanillo) get less than Tortuguero but still receive it. Community cleanup brigades have run organized beach cleanings in Puerto Viejo center, Playa Negra and Punta Uva.
- •Tortuguero is the most affected spot and it matters beyond aesthetics: heaped sargassum changes the beach profile and can obstruct sea turtle nesting and hatchling runs during the July-October green turtle season.
- •Researchers tracking the region note the source has shifted to a persistent recirculating belt in the tropical Atlantic rather than the historic Sargasso Sea, which is why arrivals now start earlier and last longer than the old March-May pattern.
- •If sargassum is a dealbreaker, book the Pacific. If you want Caribbean-side culture and reef, target the September-November mini-dry season, which is both the sunniest stretch on that coast and past the sargassum peak.
Last checked · Sources: Tico Times - Sargassum arrivals break records in Costa Rica's Caribbean, Jun 2026, Delfino.cr - MINAE reports sargassum in the northern Caribbean, Feb 2026, Tico Times - Sargassum buildup grows on northern Caribbean coast, Feb 2026, Infobae Costa Rica - environmental alert over sargassum accumulation, Feb 2026, Alma del Pacifico - sargassum guidance for Costa Rica's Pacific coast, UNA Comunica - sectors respond to sargassum on the Caribbean coast
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