There isn’t one exact start and end date that works for every destination, but sargassum tends to be more of a concern from spring through summer and into early fall in many parts of the Caribbean and Mexican Caribbean.

Conditions can vary a lot from one year to the next, though. A month that was relatively clear last year isn’t guaranteed to look the same this year, which is why the finder looks at seasonal risk rather than treating sargassum season like a fixed calendar.

There’s no Caribbean island that can promise you’ll never see sargassum, and sometimes which side of the island you’re staying on matters almost as much as the island itself.

Some destinations and sheltered coastlines tend to have lower exposure. For example, Curaçao’s popular beaches along its protected south and west coasts generally experience much less sargassum than many heavily exposed Caribbean beaches.

That’s one reason this tool doesn’t simply hand you a “good island” and “bad island” list. Your destination, coastline, travel month, and seasonal conditions all matter.

Yes. Cancun and the Mexican Caribbean can experience significant sargassum, particularly during higher-risk parts of the year.

But that doesn’t mean every Cancun beach will look the same on the same day. Wind, currents, beach orientation, cleanup efforts, and local conditions can leave one stretch of beach looking very different from another.

So “Cancun gets sargassum” is useful information, but it’s not the whole story. The timing and exact location matter too.

Yes. Many resorts and beach operators regularly remove sargassum from the shoreline, especially in destinations where seasonal arrivals are common.

Cleanup can make a big difference in what you actually experience at the resort, but it can’t stop new sargassum from arriving. A beach that’s cleaned in the morning can receive another influx later.

That’s why a resort with an active cleanup program may look much better than a nearby beach even when both are dealing with the same general conditions.

No. And we’d rather tell you that upfront than pretend otherwise.

The Sargassum Risk Finder is designed to give you a seasonal risk starting point based on the destination, location, and time of year. It cannot tell you exactly how much sargassum will be sitting on a particular beach on the Tuesday morning you arrive.

Sargassum moves with currents, winds, waves, and other changing conditions, so exact beaching is difficult to predict. Use the finder to make a smarter destination decision, then check recent beach reports or current conditions again as your trip gets closer.