Authorities in Madeira are warning residents of worsening weather conditions starting Tuesday, March 17, 2026, as Depression Therese approaches the archipelago. The regional Civil Protection Service is urging people to take preventative measures as the storm is expected to bring strong winds, heavy rain, and high seas.
Wind gusts up to 81 mph (130 km/h), snow above 4,600 feet (1,400 meters), and waves potentially reaching 39 feet (12 meters) in height are forecast.
According to a statement from the Civil Protection Service, the weather will be impacted by a weakening high-pressure system combined with the approaching depression, centered between the Azores and Madeira. These conditions are expected to affect Madeira and Porto Santo through early next week.
The forecast indicates deteriorating conditions between March 17 and March 20, with periods of extremely cloudy skies and showers, some potentially heavy and accompanied by thunderstorms, across both Madeira and Porto Santo.
Snowfall is too predicted above altitudes of 4,600 to 4,900 feet (1,400 to 1,500 meters) on March 18 and 19.
Winds are expected to blow from the west and southwest, becoming moderate to strong starting Wednesday, with gusts potentially reaching 56 mph (90 km/h). In higher elevations, gusts could reach 81 mph (130 km/h) by Friday morning.
Sea conditions will also worsen starting Wednesday afternoon, with waves of 13 to 16 feet (four to five meters) on the north coast and the western part of the south coast of Madeira and Porto Santo. By Friday, conditions are expected to deteriorate further, with waves potentially reaching 16 to 19 feet (five to six meters) and a maximum height of 33 to 39 feet (10 to 12 meters).
The regional Civil Protection Service warns of the possibility of falling branches or trees, urban flooding, landslides, coastal surges, and slippery road surfaces. The approaching storm underscores the importance of preparedness in vulnerable coastal regions.
Authorities recommend that residents avoid unnecessary travel, ensure drainage systems are clear, secure loose structures, and practice defensive driving. These preventative measures are crucial as the islands prepare for the impact of the storm.
The Civil Protection Service also advises against traveling in flooded areas or mountainous regions with snow, and to respect any access restrictions that may be put in place.
