When is the Rainy Season in Porto, Portugal?

Polina
Polina

A sommelier and a wine tour guide. I travel all around Portugal collecting the best wineries to visit, best places to stay and eat.

I organize wine tours in the Douro Valley.

The rainy season in Porto typically occurs during the autumn and winter months, which are from October to February.  During this time, rainfall can be relatively frequent and heavy at times.  

On average, Porto has approximately 150 rainy days per year. This means that it can rain in Porto on about 12 to 13 days per month. 

November, December and January have the highest chance of rainy weather. The summer months of June to August are generally drier with fewer rainy days.

However, during Porto’s climate can be unpredictable, and there can be a good number of sunny and warm days during the winter months.  Porto weather may be very enjoyable in months of January and February.  The winter of 2021 saw hardly any rain, but in 2022 we had 5 weeks of constant rain in December in January.

Just keep in mind that rain is possible, check the weather forecast and get equipped for those wet days.

Why is Porto Rainy?

Fog over the ocean in Porto

The city’s proximity to the Atlantic Ocean makes it susceptible to moisture-laden air masses that can bring rain and humidity to the region. The westerly winds also bring in cool, moist air from the ocean, which can cause condensation and precipitation.

The Atlantic beaches of Porto are often covered with fog which is a spectacular view.

Furthermore, the Serra do Marão mountain range to the east of Porto plays a significant role in the city’s weather patterns. The mountains create a natural barrier that can trap moisture in the atmosphere, leading to increased cloud cover and rainfall in the surrounding areas.

I have noticed that the weather in the Douro Valley which is inland from Porto can be much dryer than in Porto, however, the more continental climate makes it colder or hotter as well.  I have linked my article on visiting Douro Valley below.

How to Visit Wineries in the Douro Valley?

Average Rainfall in Porto by Month

Here is the average rainfall in Porto by month, based on data from recent years:

  • January: 158 mm
  • February: 130 mm
  • March: 116 mm
  • April: 113 mm
  • May: 85 mm
  • June: 48 mm
  • July: 23 mm
  • August: 31 mm
  • September: 75 mm
  • October: 126 mm
  • November: 162 mm
  • December: 181 mm

Average Temperature in Porto by Month

Here is the average temperature in Porto by month, based on recent years’ data:

  • January: 11.2°C (52.2°F)
  • February: 12.3°C (54.1°F)
  • March: 14.3°C (57.7°F)
  • April: 15.6°C (60.1°F)
  • May: 18.2°C (64.8°F)
  • June: 21.2°C (70.2°F)
  • July: 23.8°C (74.8°F)
  • August: 23.8°C (74.8°F)
  • September: 22.2°C (72°F)
  • October: 18.4°C (65.1°F)
  • November: 14.9°C (58.8°F)
  • December: 12.5°C (54.5°F)
 

Summary

From my experience, overall the climate in Porto is mostly pleasant and rarely very cold. 

If you are here on a rainy day or during a rainy week, you will also find plenty of things to do as Porto is a magnificent city rain or shine: cooking classes, food tours, wine tastings, museums, shopping are just some of the ideas.

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