Mexico's Pacific Coast Braces for High Waves and Storms Amid 'Mar de Fondo' Surge

A sea‑swell phenomenon known as “mar de fondo” is expected to continue over Mexico's Pacific shoreline. In Oaxaca, the event will bring hot temperatures, variable rain, locally strong thunderstorms, heavy downpours, electrical activity and strong winds, especially in the afternoon and night. The swell will also generate elevated surf, strong back‑currents and hazardous sea conditions along the coast from San Mateo del Mar to Santiago Pinotepa Nacional.

The same marine surge will affect Guerrero and other Pacific states from Chiapas to Sinaloa for the next 48 hours, producing waves of 1.8‑2.4 m, periods of 18‑20 seconds and strong return currents that may cause coastal erosion. Civil‑protection authorities have issued warnings, urging the public to avoid swimming, water sports and walking on the beach, to secure or remove beach‑side structures, and to follow instructions from lifeguards and maritime officials.