The Portuguese Institute of the Sea and Atmosphere (IPMA) issued a yellow warning for all districts of mainland Portugal this Wednesday, November 5, 2025, due to the forecast of heavy and persistent precipitation. The measure affects the territory from midnight, with the first impacts on the north and central coast on Tuesday night. The alert aims to prepare the population for risks associated with bad weather, such as localized flooding and traffic disruptions.
The districts of Viana do Castelo, Braga, Porto, Aveiro, Coimbra and Leiria come into force at 9pm on Tuesday, initially due to wind with gusts of up to 85 km/h and sea disturbances. The progressive extension to the rest of the country occurs during the night, with the warning active until at least 3pm on Wednesday. Authorities recommend caution in vulnerable areas.
- Possible accumulations of 30 to 50 mm in 12 hours in the North and Center;
- Wind gusts above 100 km/h in high areas of the Center;
- Isolated thunderstorms in some regions, increasing the local intensity of rain.
Advance of the cold front across the territory
A cold front associated with an Atlantic depression advances from northwest to southeast, bringing heavy clouds throughout Wednesday. Precipitation starts lightly in Minho at the end of Tuesday, but gains strength in the morning, progressively affecting the Douro Litoral and the Center.
In the interior, as in Vila Real and Viseu, moderate rain is expected with strong gusts in the highlands. The National Emergency and Civil Protection Authority (ANEPC) monitors the situation to activate rapid responses in case of worsening.
Regions most vulnerable to precipitation
Viana do Castelo and Braga face the first intense showers from 9pm on Tuesday. Coimbra and Leiria register initial alerts due to sea unrest, with waves of up to 4 meters on the coast.
The forecast indicates peaks of rain between 3am and 7am on Wednesday, with accumulations that could exceed 50 mm in elevated areas of Serra da Estrela. Local populations prepare drainages to avoid flooding in urban areas.
Lisbon and Setúbal enter the alert at midnight, with persistent precipitation that decreases in intensity to the south. Faro predicts lighter rains, but withpossibility of thunderstorms in the Algarve.
Beja and Évora complete the coverage, with the frontal system weakening after midday.
Variations in expected temperatures
Minimum temperatures register a slight drop this Monday, varying from 3°C in Bragança to 12°C in Faro. Maximums rise slightly in the North and Center interior, reaching 22°C in Évora and Setúbal.
On Wednesday, the maximum falls across the country, with values between 13°C in Guarda and 20°C on the south coast. High humidity worsens the feeling of cold at night.
IPMA notes a positive anomaly in the weekly average temperature, but accumulated precipitation may exceed 75 mm in isolated points in the North.
Recommended preventive measures
ANEPC advises the cleaning of gutters and ditches to avoid flooding. Avoid unnecessary travel on local roads during peak rain.
Drivers should reduce speed on wet roads, prioritizing central lanes. Fishermen and sailors suspend activities due to sea unrest.
In riverside areas, monitor river levels such as the Douro and Tagus, which can rise quickly with 30 mm of precipitation.
Evolution of the weather system
The polar jet waves over the Atlantic, driving the depression that hits Portugal in the middle of November. Numerical models predict stabilization atpost Thursday, with anticyclone bringing sun over the weekend.
The instability appears after a dry period, in line with the seasonal forecast of negative precipitation in the North and Center for the month. IPMA updates daily bulletins for precise adjustments.
