September weather forecast
Portugal

September in Portugal marks the transition from summer to autumn, characterized by gradually decreasing temperatures and slightly increased rainfall. The average temperature across the country is around 22°C (71.6°F) during this month. Coastal cities like Lisbon and Porto provide milder weather conditions with Lisbon seeing temperatures from 17°C (62.6°F) to 27°C (80.6°F), and Porto experiencing temperatures between 14°C (57.2°F) and 23°C (73.4°F).

Precipitation in September begins to increase compared to the dry summer months, with Lisbon receiving an average of about 30mm (1.18") and Porto seeing a bit more at approximately 70mm (2.76"). Given the mild weather, snowfall in northern high-altitude areas, such as Serra da Estrela, remains highly unlikely.

Compared to the preceding month, August, September experiences a decrease in temperature and a slight increase in rainfall, signaling the beginning of the transition into the cooler autumn months. Looking to the following month, October, September is generally warmer and drier. The gentle shift in climate makes September a pleasant month for exploration and outdoor activities, as visitors can still enjoy the tail-end of the warm summer weather along with the onset of autumn's scenic beauty.

---

• Lisbon - September »
  In Lisbon, Portugal, during September, the rain falls for 6 days and regularly aggregates up to 33mm (1.3") of precipitation. On the first day of September in Lisbon, sunrise is at 07:05 and sunset at 20:07.
• Porto - September »
  With an average sea temperature of 18.2°C (64.8°F), September is the month with the warmest seawater in Porto, Portugal. With an average sea temperature of 18.2°C (64.8°F), September is the month with the warmest seawater in Porto.
• Faro - September »
  On the first day of September in Faro sunrise is at 07:02 and sunset at 20:01. In September, the average sea temperature in Faro, Portugal, is 21.6°C (70.9°F).
• Coimbra - September »
  Embracing the arrival of autumn, September brings a subtle decrease in temperature, making the days and nights in Coimbra more comfortable. On the first day of September in Coimbra, sunrise is at 07:01 and sunset at 20:06.
• Braga - September »
  On the first day of September in Braga sunrise is at 06:59 and sunset at 20:07. In Braga, in September, it is raining for 7.4 days, with typically 35mm (1.38") of accumulated precipitation.
• Aveiro - September »
  With September's arrival, Aveiro, Portugal, notes an average high-temperature of a still warm 24.5°C (76.1°F), closely following the trend of the preceding month. In Aveiro, in September, it is raining for 5.8 days, with typically 23mm (0.91") of accumulated precipitation.
• Evora - September »
  In Evora in September, it is raining for 5 days, with typically 32mm (1.26") of accumulated precipitation. On the first day of September in Evora, sunrise is at 07:00 and sunset at 20:02.
• Viseu - September »
  In Viseu, in September, during 6.2 rainfall days, 21mm (0.83") of precipitation is typically accumulated. On the last day of September, in Viseu, sunrise is at 07:26 and sunset at 19:16 WEST.
• Funchal - September »
  September is the month with the warmest seawater in Funchal, with an average sea temperature of 23.8°C (74.8°F). In Funchal, during September, the rain falls for 6.9 days and regularly aggregates up to 10mm (0.39") of precipitation.
• Guarda - September »
  In Guarda in September, during 5.9 rainfall days, 19mm (0.75") of precipitation is typically accumulated. In Guarda, in September, during 5.9 rainfall days, 19mm (0.75") of precipitation is typically accumulated.
• Beja - September »
  On the first day of September in Beja, Portugal, sunrise is at 07:01 and sunset at 20:01. On the first day of September in Beja, sunrise is at 07:01 and sunset at 20:01.