PortoPhoto: Ken & Nyetta · CC BY 2.0Portugal · Europe
Best time to visit Porto
Porto sits on the Atlantic and is milder but much wetter than southern Portugal. Summers are pleasantly warm and dry, while winters are grey and rainy. The sea stays on the cool side.
Climate decision
Best travel months for Porto
Top recommendation
Next highest scores
Historical monthly averages, not a weather forecast. Individual days and years can differ substantially.
Latest 5-year values 2021–2025
Average of the five most recent complete years compared with the 1991–2025 climate average.
June · Wet days
9.2 days/month
1991–2025: 5.7 days/month
+3.5 days/month · higher
October · Mean daily maximum
21.7 °C
1991–2025: 20.3 °C
+1.3 °C · higher
August · Monthly precipitation
5 mm/month
1991–2025: 20.6 mm/month
-15.6 mm/month · lower
September · Sea temperature
17.3 °C
1991–2025: 17.4 °C
-0 °C · similar
July: 23/155 days at or above 30 °C; highest single value 35.6 °C.
Five-year historical sample, not a weather forecast or long-term climate trend. Individual hot days can be far above the monthly mean.
Annual profile · Rainfall rhythm
Porto: rainfall separates the travel months
The driest and wettest months are 11 rainy days apart. Average daily highs vary by 11.6 °C, so both signals matter when choosing a month.
What matters
A warmer month is not automatically the most reliable. Read the drier windows alongside sunshine, sea temperature and the activity you have in mind.
Fewest rainy days
July · 2.9
Most rainy days
November · 13.9
Most sunshine
July · 9 h
Warmest sea
September · 17.4 °C
Month by month
Overall suitability per month. Tap a month for details.
All climate figures compared
The table is the complete accessible data view; the charts below highlight selected patterns.
| Month | Avg high °C | Avg low °C | Rainy days (est.) | Rain mm | Sun h/day (est.) | Humidity % | Wind m/s | Sea °C | Score |
|---|---|---|---|---|---|---|---|---|---|
| January | 13 | 8 | 13 | 131 | 2.3 | 85 | 2.5 | 14 | 33 |
| February | 14 | 8 | 10 | 88 | 3.5 | 83 | 2.4 | 13 | 41 |
| March | 16 | 9 | 11 | 96 | 5.0 | 81 | 2.3 | 14 | 47 |
| April | 17 | 11 | 12 | 91 | 6.6 | 80 | 2.2 | 15 | 51 |
| May | 19 | 13 | 11 | 71 | 7.9 | 78 | 2.0 | 16 | 61 |
| June | 22 | 15 | 6 | 31 | 8.6 | 76 | 1.9 | 17 | 78 |
| July | 25 | 16 | 3 | 13 | 9.0 | 73 | 1.8 | 17 | 82 |
| August | 25 | 17 | 3 | 21 | 7.9 | 72 | 1.7 | 17 | 83 |
| September | 23 | 16 | 7 | 58 | 6.1 | 74 | 1.7 | 17 | 77 |
| October | 20 | 14 | 13 | 133 | 3.9 | 79 | 2.1 | 17 | 57 |
| November | 16 | 11 | 14 | 142 | 2.6 | 83 | 2.5 | 16 | 40 |
| December | 14 | 9 | 14 | 134 | 2.0 | 85 | 2.5 | 14 | 33 |
Climate through the year
Compare temperature, rainy days, sunshine and, for coastal destinations, sea temperature month by month.
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Where to stay in Porto
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The number is the overall climate score, not a similarity score.
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Frequently asked questions
When is the best time to visit Porto?
The strongest climate months are June, July, August, September. Values are historical averages, not a forecast.
Which month has the highest average daily maximum temperature in Porto?
The average daily maximum temperature in Porto is highest in August at around 25 °C.
When is the sea warmest at Porto?
In September, at around 17 °C.