The Sargassummonitoring website offers an overview of the current situation on the basis of maps and current photos of the beaches of the Caribbean mainland and the islands.
There is a map of the beaches affected (red markings) by Sargassum (brown algae) as well as one of the beaches not affected (green markings).
The situation on the beaches of Tulúm seems to have eased considerably in the second half of January, while elsewhere the stinking algae are still piling up into real dumps.
Even if not every single one of the contributed images can be clearly verified, the website still offers a good overview to all travel willing people.
If you are interested in planning a Yucatán trip, we also offer to spend some bathing days in Mexico’s lagoon of the seven colours (Laguna de Bacalar), which is guaranteed to be free of the annoying algae. The Isla Holbox is also an alternative to Tulúm.