The Canary Islands’ Dirty Secret: Deadly Red Flags on Beaches and Health Warnings for Tourists Travelling to Tenerife, Gran Canaria, and Lanzarote, What You Need to Know Before Your Trip?

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Environmental campaigners in the Canary Islands have issued a series of urgent warnings and demands in response to a growing sewage contamination crisis that has been exacerbated by recent winter storms. Tourists are being urged to avoid swimming in many coastal areas of Tenerife, Gran Canaria, and Lanzarote, as the islands face a public health emergency linked to raw sewage discharges into the sea. This public health crisis comes on the heels of a damning ruling from the European Union, which condemned Spain for failing to adequately manage wastewater systems, particularly in high-traffic tourist zones.

What is the Cause of the Crisis?
In mid-January 2026, environmental groups such as Ben Magec – Ecologists in Action and the Tenerife Association of Friends of Nature (ATAN) raised alarms over the severe contamination of the island’s coastal waters. The primary cause behind the contamination has been identified as a significant failure in wastewater management, which has led to untreated sewage being discharged directly into the ocean. Heavy winter storms, which battered the islands in early 2026, have further worsened the situation, causing visible stains, foam, and discharges along popular beach areas.

The situation has reached alarming levels, with numerous beaches facing temporary or long-term closures due to the presence of dangerous pathogens, including E. coli. These concerns have been compounded by a ruling from the Court of Justice of the European Union (CJEU), which found Spain in violation of EU laws on wastewater treatment, particularly on the island of Tenerife.

Why Was This Situation Created?
The sewage crisis stems from several critical failures in Spain’s ability to collect and treat urban wastewater, as highlighted by the European Union’s December 2025 ruling. According to the ruling, Spain has failed to maintain a proper wastewater treatment infrastructure in several parts of the Canary Islands, most notably in Tenerife. The CJEU identified at least 12 key areas on Tenerife alone where the management of wastewater was either insufficient or entirely absent. These included heavily visited tourist zones such as the Orotava Valley and Granadilla, areas that receive significant numbers of international and British visitors each year.

Campaigners argue that these failures have now put public health at risk, especially given that over half of the islands’ 403 sewage discharge points are unauthorized and lack proper oversight. They demand immediate action to address the growing health hazards caused by this inadequate infrastructure.

What Are the Consequences of This Crisis?
The immediate consequences of the crisis have been felt by both tourists and local residents. On January 24, 2026, health warnings were issued for beaches across the Canary Islands, with the majority of beaches in Tenerife and Gran Canaria being deemed unsafe for swimming. This includes popular spots such as Playa Jardín in Puerto de la Cruz, which has been closed for nearly a year due to consistently high levels of E. coli. Similarly, the Tabaiba Coast and Playa del Moro have also been closed after storms damaged the sewage systems, leading to raw waste being discharged directly into the sea.

Tourists visiting the islands in early 2026 have been advised to check local beach status regularly before swimming. Local authorities and environmental organizations have emphasized the importance of looking for physical “Red Flag” warnings at beaches, which signal unsafe swimming conditions due to either pollution or hazardous weather conditions. Travelers are also advised to stay away from the northern coasts of the islands during heavy rains, which increase the risk of contamination.

What Are the Campaigners’ Demands?
The environmental groups leading the charge against the government’s inaction have laid out several demands aimed at mitigating the crisis and ensuring the safety of both locals and tourists:

1. Immediate Beach Closures: Campaigners are demanding the immediate closure of beaches as soon as pollution thresholds are exceeded, rather than waiting for scheduled tests. This would ensure faster responses to health risks and prevent further exposure to contaminated waters.
2. Tourist Moratorium: The groups have reiterated their call for a tourist moratorium, or a freeze on the development of new hotels and tourist beds, arguing that the current infrastructure is already overwhelmed by the existing 16+ million annual visitors. The strain on water systems, waste management, and local resources has made it increasingly difficult to handle the growing number of tourists.
3. Transparency: Environmental organizations are also calling for more transparent communication with tourists. They are demanding that tour operators and local authorities provide honest information about the pollution risks to potential visitors, allowing them to make informed decisions about where to stay and which beaches to visit.

How Are Tourists Impacted?
As the sewage crisis continues to unfold, the Canary Islands have been placed on Fodor’s Travel “No List” for 2026, advising tourists to reconsider visiting the islands until the environmental situation can be adequately addressed. This is a significant blow to the islands’ tourism industry, which has long relied on pristine beaches and clean coastal waters to attract millions of visitors each year.

For those still planning to visit, it is crucial to stay up to date with local beach conditions. Many beaches in Tenerife and Gran Canaria are currently under “Red Flag” warnings, meaning swimming is forbidden due to sewage contamination or hazardous sea conditions. On January 24, 2026, the beaches in and around Puerto de la Cruz, including Playa Jardín, remain closed, and other areas in Tenerife, such as the Tabaiba Coast and Playa del Moro, are also restricted due to ongoing sewage issues.

In Gran Canaria, the northern coasts are under heightened alert due to dangerous weather conditions, with expected swells exceeding 2–3 meters and hazardous undertows. The Directorate-General for Emergencies has issued a pre-alert for “Coastal Phenomena,” advising tourists to avoid swimming in these areas until conditions improve.

What Are the Safe Alternatives for Tourists?
While many beaches in the north are facing closures, some beaches in the south of Gran Canaria remain safe for swimming. Notably, Playa de Amadores has been identified as one of the safest beaches in the region. Protected by breakwaters that block most ocean swells, Amadores typically remains calm even during high winds and rough seas. It is also a Blue Flag-certified beach, which indicates that it meets high standards for water quality and safety.

Other Blue Flag beaches in the south, such as Meloneras Beach and Playa de Mogán, are also considered safer options for swimming, although travelers should still be cautious and check the flag status upon arrival. These beaches are well-sheltered and less likely to be affected by the pollution currently plaguing the northern shores.

What Can Be Done Going Forward?
The ongoing sewage crisis in the Canary Islands highlights the urgent need for sustainable tourism practices and better management of the islands’ infrastructure. Environmental groups continue to pressure the Spanish government and local authorities to take immediate action to address the crisis, including investing in better wastewater treatment systems and improving oversight of sewage discharge points.

For tourists, the advice is clear: stay informed about local conditions, check for flag warnings, and reconsider visiting certain beaches. Until the situation improves, travelers are encouraged to consider southern beaches that are more sheltered and less affected by the sewage contamination.

Conclusion
The Canary Islands’ ongoing sewage contamination crisis has led to beach closures, health warnings, and widespread environmental protests. While the region continues to deal with the fallout from a lack of adequate wastewater infrastructure, both locals and tourists must remain vigilant. With transparent communication and proper safety measures in place, the islands may be able to recover and return to their former glory as one of Europe’s top travel destinations.

For more information on current beach status and health warnings, travelers should visit local government websites or consult with tour operators before booking their trips.