IPMA issues yellow weather alert for six Portuguese districts due to heavy rain

The Portuguese Institute for the Sea and Atmosphere issued a yellow weather alert for six districts in mainland Portugal at 03:00 on November 15, 2026. This weather warning was moved forward by three hours from the original scheduled start time of 06:00. The alert covers Viseu, Porto, Vila Real, Viana do Castelo, Aveiro, and Braga until 15:00 on November 15, 2026.

Weather alert details and timing

The Portuguese Institute for the Sea and Atmosphere warned of persistent and sometimes heavy precipitation, particularly in mountainous areas. The initial yellow alert remains in effect for the six specified districts until 15:00 on November 15, 2026. However, a second yellow alert is scheduled for Viana do Castelo and Braga starting at 21:00 on November 15, 2026. This second period of alert will last until 06:00 on November 16, 2026.

Forecasts for November 15, 2026, include very cloudy skies and rain across the North and Central regions until mid-afternoon. The yellow alert represents the lowest level of a three-tier scale used by the Portuguese Institute for the Sea and Atmosphere to indicate weather-dependent risks to the public.

Temperature forecasts and regional variations

Meteorological data for November 15, 2026, shows significant variation in temperatures across the affected regions. Minimum temperatures are expected to reach 10°C in Vila Real and Bragança. In Aveiro, the minimum temperature is expected to be 15°C.

Maximum temperatures will also vary depending on the location. The maximum temperature in Guarda is expected to be 10°C. In contrast, the maximum temperatures in Santarém and Setúbal are expected to reach 21°C. These temperature fluctuations occur alongside the predicted heavy precipitation and cloudy conditions throughout the North and Central regions of the country.

The Portuguese Institute for the Sea and Atmosphere continues to monitor the weather patterns to provide updated information regarding these risks. Residents in the affected districts of Viseu, Porto, Vila Real, Viana do Castelo, Aveiro, and Braga should remain aware of the potential for heavy rain and persistent precipitation throughout the day and into the following morning in certain areas.

Glossary

• Vila Real — The District of Vila Real is a district located in northern Portugal. It is a rugged area characterized by low mountains and narrow valleys.
• Viana do Castelo — The Port of Viana do Castelo is located near the mouth of the Lima River in northwestern Portugal. It is managed by the APDL – Administração dos Portos do Douro, Leixões e Viana do Castelo, SA.
• Aveiro — The Port of Aveiro is a port located in the district of Aveiro, situated within a lagoon that forms the Ria de Aveiro. It is used for the movement of various types of goods and is administered by the Administração do Porto de Aveiro, S.A.
• Portuguese Institute for the Sea and Atmosphere — The Portuguese Institute for the Sea and Atmosphere is an organization that issues weather alerts to indicate weather-dependent risks to the public. It monitors weather patterns to provide updated information regarding these risks.