Coastal paradises under pressure: record algae plague Caribbean tourism!

Coastal paradises under pressure: record algae plague Caribbean tourism!

The Caribbean is facing a record plague of sargassum seaweed, severely threatening tourism, one of the region's most important sources of income. In 2025, the amount of this algae reached an alarming 38 million tons, as Mercury reported. This is the largest amount since investigations began in 2011, with the previous peak being around 22 million tonnes in June 2022, it said daily news. The impacts are significant for holidaymakers and the local population alike.

The main problem is the unbearable stench caused by the decomposition of the algae and the release of hydrogen sulphide. Many tourists complain that they cannot enjoy the beaches and have even had to change accommodation in some areas. The tourism industry is responding to this challenge with various measures, including refunds for guests and shuttle services to less affected beaches.

Measures against the algae plague

Popular travel destinations like Punta Cana have put up barriers to keep the algae out. These preventative measures are necessary because the algae plague not only affects holiday enjoyment, but also damages the environment. In St. Maarten, excavators are being used to clear the beaches of algae. In addition, tractors are mobilized for cleaning operations to minimize the smell.

The Dominican Republic, as the most visited country in the Caribbean, attracts 8.5 million tourists annually. Of these, around 5.3 million came from Europe, which is 89 percent of the 2019 level. Nevertheless, increasing algae accumulations, encouraged by factors such as water heat and agricultural runoff, may threaten tourism growth.

Ecological impacts and expert explanations

The explosion in algae growth observed by experts like Brian Barnes of the University of South Florida is cause for concern. Causes such as warming water, changes in wind and currents, and agricultural runoff could exacerbate the situation. Although some seaweed accumulations represent a healthy ecosystem in the open ocean, they pose significant disadvantages near the coast by blocking sunlight and suffocating coral reefs.

The Caribbean is therefore facing an acute challenge. Experts expect a further increase in sargassum quantities in the coming months, reinforcing the need for effective solutions in the tourism industry and environmental protection. Destinations urgently need to find ways to preserve the beauty and accessibility of their beaches for tourists.