Los Cabos civil protection authorities issued a warning about dangerous ground swells hitting both the Pacific and Gulf of California coasts from April 2 through April 4. Waves are expected to reach 2 to 2.5 meters (6.5 to 8 feet), with strong rip currents making swimming and water activities hazardous across the municipality.
The warning coincides with the peak of Semana Santa 2026, when tens of thousands of domestic and international visitors pack the beaches of Cabo San Lucas and San José del Cabo. Officials are urging beachgoers to stay out of the water, respect posted flag signage, and follow all lifeguard instructions during the alert period.
What Is a Mar de Fondo?
The phenomenon, known locally as a “mar de fondo,” is a deep-ocean swell system that pushes heavy wave energy toward the coastline. Unlike a localized storm, this type of swell generates powerful, invisible rip currents beneath the surface. Even strong swimmers can be pulled offshore in seconds.
Los Cabos has already dealt with similar conditions this spring. In mid-March, authorities closed major tourist beaches including Santa María, El Chileno, Palmilla, Costa Azul, and all Riu resort properties due to a mar de fondo event that produced waves of similar height. ZOFEMAT (the Federal Maritime Terrestrial Zone authority) lifeguards raised red and black flags across most of the coastline during that episode.
Beach Flags and Safety Rules
Beachgoers should check the colored flag system before entering the water. A red or black flag means the ocean is completely closed to swimmers. A yellow flag allows swimming with extreme caution in geographically protected areas only. Green means conditions are safe.
The warning also extends to watercraft. Boat tours, jet ski rentals, and snorkeling excursions face elevated risk from unpredictable swells that can capsize small vessels. The Pacific side of Los Cabos typically takes the worst of these swell events, but Sea of Cortez beaches like Chileno and Santa María can also develop dangerous undertow despite appearing calmer on the surface.
Semana Santa Safety Operation
The interinstitutional Semana Santa safety operation runs March 30 through April 5 in Los Cabos. The surf warning adds a serious layer of risk during the busiest beach days of the holiday. Conditions are expected to improve after April 4.
Los Cabos beaches have notoriously steep underwater drop-offs, particularly on the Pacific side, where the ocean floor plunges to depths of over 100 meters within a short distance from shore. These conditions make rip currents especially deadly during swell events.
This story was first reported by BCS Noticias.