Porto, PORTUGAL and its best beaches
Climate - Temperatures and rainfall - Atlantic Ocean
Porto: Temperatures during the day, at night, rain and bathing conditions
|
January Day temperature  56°F / 13°C |
Night temp.  41°F / 05°C |
Bathing temperature  61°F / 16°C |
Rain  170 mm |
Non-ideal conditions
|
|
February Day temperature 58°F / 14°C |
Night temp. 43°F / 06°C |
Bathing temperature 61°F / 16°C |
Rain 170 mm |
Non-ideal conditions
|
|
March Day temperature 61°F / 16°C |
Night temp. 45°F / 07°C |
Bathing temperature 61°F / 16°C |
Rain 112 mm |
Non-ideal conditions
|
|
April Day temperature 63°F / 17°C |
Night temp. 47°F / 08°C |
Bathing temperature 61°F / 16°C |
Rain 112 mm |
Non-ideal conditions
|
|
May Day temperature 67°F / 19°C |
Night temp. 52°F / 11°C |
Bathing temperature 63°F / 17°C |
Rain 089 mm |
Non-ideal conditions
|
|
June Day temperature 72°F / 22°C |
Night temp. 56°F / 13°C |
Bathing temperature 68°F / 20°C |
Rain 053 mm |
Non-ideal conditions
|
|
July Day temperature 76°F / 24°C |
Night temp. 59°F / 15°C |
Bathing temperature 72°F / 22°C |
Rain 015 mm |
|
|
August Day temperature 77°F / 25°C |
Night temp. 58°F / 14°C |
Bathing temperature 74°F / 23°C |
Rain 023 mm |
|
|
September Day temperature 76°F / 24°C |
Night temp. 58°F / 14°C |
Bathing temperature 70°F / 21°C |
Rain 064 mm |
|
|
October Day temperature 70°F / 21°C |
Night temp. 52°F / 11°C |
Bathing temperature 67°F / 19°C |
Rain 132 mm |
Non-ideal conditions
|
|
November Day temperature 63°F / 17°C |
Night temp. 47°F / 08°C |
Bathing temperature 65°F / 18°C |
Rain 152 mm |
Non-ideal conditions
|
|
December Day temperature 58°F / 14°C |
Night temp. 43°F / 06°C |
Bathing temperature 63°F / 17°C |
Rain 175 mm |
Non-ideal conditions
|
Portugal : climate and when to go to Porto
Fresh and rainy temperate maritime climate to the north, hotter and drier in the south (104°F in summer). The Atlantic Ocean brings softness and moisture to Portugal all year round. In summer, the temperature of the water is on average 70°F in the Algarve on the Atlantic Ocean.
| January Avoid |
February Avoid |
March Avoid |
April Avoid |
May Avoid |
June Avoid |
July Risky |
August Risky |
September Risky |
October Avoid |
November Avoid |
December Avoid |
When to go? The hottest month for the beach, lazing around and swimming is August. Check the precipitations because showers are possible but the sun returns quickly, otherwise other periods are possible. The coolest month is January, if you can not stand the heat too much. The driest month of the year is July, if you do not like the rain at all.
Click on
Faro -
Porto -
Lisbon -
The Azores to display its climate.
Graphs and temperature curves with average precipitation over the year
Precipitation, rainfall, cyclone: PORTUGAL
Temperatures of bathing water around Porto
Landmarks
Perfect conditions to enjoy the beach.
Favorable conditions for enjoying the beach. Cloudy with sunny spells and thunderstorms.
Very strong tropical or monsoon rains.
Months at risk of cyclones with alerts level 1 to 5.
Nice swimming at more than 26°C / 79°F.
Everything is perfect for traveling.No cyclone risk for this country
Atlantic Ocean
Climate September 2025
Porto sunshine in summer and winter
The sun at its zenith, that means well perpendicular to the surface of the Earth, sending 100% of radiation and heat. Porto receives in winter (january), 42% of sun power and 95% during summer time (july).
The average temperature and sunshine deviations between summer and winter are 53%. This large gap means that the temperature at sea varies and that it can be cooler during the winter. A sweater can be nice in the early morning or evening, the fell night in cooler season.
Average temperatures and rainfall for a stay in September
On the left, the averages observed every month of September on the Portugal beaches. The trends for next month are, slightly lower average daytime temperatures, a bathing water in Atlantic Ocean which loses degrees, more abundant rains with cooler nights.
Sunset and sunrise times for PORTUGAL
Local time : September 2025, Tuesday 16, 01:10 AM
Sunrise time : 06:19 am, point A
Sunset time : 6:38 pm, point B
Duration of daylight : 12:19 / 24:00
Jet lag : GMT+0
The average monthly UV index of PORTUGAL
What is the period of mosquitoes virulence over the year?
Weather forecast for Porto
Here are the current 5-day forecasts for Foz Do Douro / Porto. Temperatures are spaced 3 hours apart for each day. The summary of the state of the sky gives the trend of the week. The sea temperature at is a monthly average. In lagoons or seashores where the bathing water is shallow, you can add some degrees.
Wednesday
September 17, 2025
8 am
63.7°F
18°C
Clear sky
Humidity 56%
Sea 70°F/21°C
Wednesday
September 17, 2025
11 am
67.7°F
20°C
Clear sky
Humidity 48%
Sea 70°F/21°C
Wednesday
September 17, 2025
2 pm
69.9°F
22°C
Clear sky
Humidity 52%
Sea 70°F/21°C
Wednesday
September 17, 2025
5 pm
68.7°F
21°C
Clear sky
Humidity 59%
Sea 70°F/21°C
Wednesday
September 17, 2025
8 pm
68.2°F
21°C
Clear sky
Humidity 65%
Sea 70°F/21°C
Wednesday
September 17, 2025
11 pm
66.9°F
20°C
Clear sky
Humidity 71%
Sea 70°F/21°C
Thrusday
September 18, 2025
8 am
65.2°F
19°C
Clear sky
Humidity 63%
Sea 70°F/21°C
Thrusday
September 18, 2025
11 am
70.1°F
22°C
Overcast clouds
Humidity 47%
Sea 70°F/21°C
Thrusday
September 18, 2025
2 pm
72.6°F
23°C
Overcast clouds
Humidity 50%
Sea 70°F/21°C
Thrusday
September 18, 2025
5 pm
71.6°F
22°C
Overcast clouds
Humidity 54%
Sea 70°F/21°C
Thrusday
September 18, 2025
8 pm
71.2°F
22°C
Overcast clouds
Humidity 53%
Sea 70°F/21°C
Thrusday
September 18, 2025
11 pm
69.9°F
22°C
Overcast clouds
Humidity 52%
Sea 70°F/21°C
Friday
September 19, 2025
8 am
67.8°F
20°C
Overcast clouds
Humidity 52%
Sea 70°F/21°C
Friday
September 19, 2025
11 am
69.4°F
21°C
Light rain
Humidity 62%
Sea 70°F/21°C
Friday
September 19, 2025
2 pm
73.7°F
24°C
Overcast clouds
Humidity 48%
Sea 70°F/21°C
Friday
September 19, 2025
5 pm
71.4°F
22°C
Overcast clouds
Humidity 56%
Sea 70°F/21°C
Friday
September 19, 2025
8 pm
69.7°F
21°C
Light rain
Humidity 62%
Sea 70°F/21°C
Friday
September 19, 2025
11 pm
67.9°F
20°C
Overcast clouds
Humidity 67%
Sea 70°F/21°C
Saturday
September 20, 2025
8 am
65.1°F
19°C
Overcast clouds
Humidity 72%
Sea 70°F/21°C
Saturday
September 20, 2025
11 am
66.2°F
19°C
Overcast clouds
Humidity 70%
Sea 70°F/21°C
Saturday
September 20, 2025
2 pm
66.6°F
20°C
Broken clouds
Humidity 75%
Sea 70°F/21°C
Saturday
September 20, 2025
5 pm
65.8°F
19°C
Scattered clouds
Humidity 80%
Sea 70°F/21°C
Saturday
September 20, 2025
8 pm
64.4°F
19°C
Few clouds
Humidity 76%
Sea 70°F/21°C
Saturday
September 20, 2025
11 pm
63.6°F
18°C
Clear sky
Humidity 76%
Sea 70°F/21°C
Weather uncertainties 2025 to go to Porto ?
When traveling in the tropics as a seaside, rain is not welcome. If you see this indicator, with possible storms, that does not mean that it will rain all day long. When we observe the local rainfall, it is either really zero or very weak. Meteorologists prefer to be pessimistic. So observe below, the skies photographed during a week announced stormy in Asia. It did not rain once. I invite you to integrate this parameter before going to Porto for a good trip to the sun!
