Storm Therese is set to bring worsening weather conditions across mainland Portugal over the coming days, with authorities warning of heavy rainfall, strong winds and rough sea conditions affecting large parts of the country. Forecasts indicate that the system will have the greatest impact on central and southern regions, where intense weather patterns are expected to persist through the weekend. The developing situation has raised concerns about potential disruptions to daily life, transport and coastal activity as the storm slowly moves across the Iberian Peninsula.
Meteorological data shows that the system is forming southwest of the peninsula with a central pressure of 983 hPa, indicating a well developed low pressure system capable of producing unstable conditions. Weather officials expect the storm to move gradually southward while continuing to influence Portugal’s climate until at least March 22. The slow movement of the system increases the likelihood of prolonged rainfall and repeated periods of instability, which could lead to localized flooding in vulnerable areas.
Heavy rain is expected to be one of the most significant impacts, particularly on March 19 and 20 when precipitation levels may intensify and be accompanied thunderstorms. Regions most at risk include coastal districts south of Cape Mondego as well as inland areas located south of the Serra da Estrela. Authorities have warned that these areas could experience periods of intense rainfall within short time frames, increasing pressure on drainage systems and raising the risk of temporary disruptions.
Wind conditions are also forecast to strengthen as the system evolves, with gusts expected to reach up to 75 kilometers per hour along coastal regions and as high as 95 kilometers per hour in elevated areas. Winds will initially blow from the south and southeast before shifting direction, creating changing conditions that may lead to sudden gusts and localized severe events. These patterns are expected to affect both coastal and inland regions, with stronger impacts likely in exposed and higher altitude locations.
Sea conditions are projected to deteriorate significantly, particularly along the western and southern coasts. Wave heights along parts of the western coastline could reach between four and four and a half meters, while the Algarve region may see waves of up to two and a half meters. These conditions pose risks for maritime activities and coastal operations, prompting warnings for fishermen, shipping operators and coastal communities to remain cautious as the storm progresses.
Authorities have issued weather alerts covering heavy rainfall, strong winds and rough seas, advising residents to stay informed and take necessary precautions. Officials continue to monitor the situation closely, with updates expected as the storm develops further. As the country moves through this period of instability, attention remains focused on minimizing risks and ensuring public safety across affected regions.
