Lisbon, PORTUGAL and its best beaches
Climate - Temperatures and rainfall - Atlantic Ocean
Lisbon: Temperatures during the day, at night, rain and bathing conditions
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January Day temperature  58°F / 14°C |
Night temp.  47°F / 08°C |
Bathing temperature  61°F / 16°C |
Rain  109 mm |
Non-ideal conditions
|
|
February Day temperature 61°F / 16°C |
Night temp. 49°F / 09°C |
Bathing temperature 61°F / 16°C |
Rain 112 mm |
Non-ideal conditions
|
|
March Day temperature 63°F / 17°C |
Night temp. 49°F / 09°C |
Bathing temperature 61°F / 16°C |
Rain 069 mm |
Non-ideal conditions
|
|
April Day temperature 67°F / 19°C |
Night temp. 52°F / 11°C |
Bathing temperature 61°F / 16°C |
Rain 064 mm |
Non-ideal conditions
|
|
May Day temperature 72°F / 22°C |
Night temp. 56°F / 13°C |
Bathing temperature 63°F / 17°C |
Rain 038 mm |
Non-ideal conditions
|
|
June Day temperature 76°F / 24°C |
Night temp. 61°F / 16°C |
Bathing temperature 68°F / 20°C |
Rain 020 mm |
Non-ideal conditions
|
|
July Day temperature 81°F / 27°C |
Night temp. 63°F / 17°C |
Bathing temperature 72°F / 22°C |
Rain 005 mm |
Conditions 
|
|
August Day temperature 83°F / 28°C |
Night temp. 63°F / 17°C |
Bathing temperature 74°F / 23°C |
Rain 005 mm |
Conditions 
|
|
September Day temperature 79°F / 26°C |
Night temp. 63°F / 17°C |
Bathing temperature 70°F / 21°C |
Rain 025 mm |
Conditions
|
|
October Day temperature 72°F / 22°C |
Night temp. 58°F / 14°C |
Bathing temperature 67°F / 19°C |
Rain 081 mm |
Non-ideal conditions
|
|
November Day temperature 65°F / 18°C |
Night temp. 52°F / 11°C |
Bathing temperature 65°F / 18°C |
Rain 114 mm |
Non-ideal conditions
|
|
December Day temperature 58°F / 14°C |
Night temp. 49°F / 09°C |
Bathing temperature 63°F / 17°C |
Rain 109 mm |
Non-ideal conditions
|
Portugal : climate and when to go to Lisbon
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 Fine |
August Pecfect |
September Fine |
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 Lisbon
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
Lisbon 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. Lisbon receives in winter (january), 46% of sun power and 96% during summer time (july).
The average temperature and sunshine deviations between summer and winter are 50%. 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, Thursday 18, 01:49 AM
Sunrise time : 06:24 am, point A
Sunset time : 6:36 pm, point B
Duration of daylight : 12:12 / 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 Lisbon
Here are the current 5-day forecasts for Chiado / Lisbon. 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.
Friday
September 19, 2025
8 am
70.7°F
22°C
Overcast clouds
Humidity 51%
Sea 70°F/21°C
Friday
September 19, 2025
11 am
74.6°F
24°C
Overcast clouds
Humidity 43%
Sea 70°F/21°C
Friday
September 19, 2025
2 pm
77.1°F
26°C
Overcast clouds
Humidity 45%
Sea 70°F/21°C
Friday
September 19, 2025
5 pm
78.2°F
26°C
Overcast clouds
Humidity 57%
Sea 70°F/21°C
Friday
September 19, 2025
8 pm
75.9°F
25°C
Overcast clouds
Humidity 63%
Sea 70°F/21°C
Friday
September 19, 2025
11 pm
71.6°F
22°C
Scattered clouds
Humidity 74%
Sea 70°F/21°C
Saturday
September 20, 2025
8 am
67.1°F
20°C
Overcast clouds
Humidity 69%
Sea 70°F/21°C
Saturday
September 20, 2025
11 am
71.4°F
22°C
Broken clouds
Humidity 57%
Sea 70°F/21°C
Saturday
September 20, 2025
2 pm
78.6°F
26°C
Broken clouds
Humidity 41%
Sea 70°F/21°C
Saturday
September 20, 2025
5 pm
78.6°F
26°C
Clear sky
Humidity 50%
Sea 70°F/21°C
Saturday
September 20, 2025
8 pm
70.9°F
22°C
Clear sky
Humidity 68%
Sea 70°F/21°C
Saturday
September 20, 2025
11 pm
65.1°F
19°C
Clear sky
Humidity 75%
Sea 70°F/21°C
Sunday
September 21, 2025
8 am
61.8°F
17°C
Clear sky
Humidity 76%
Sea 70°F/21°C
Sunday
September 21, 2025
11 am
65.9°F
19°C
Clear sky
Humidity 59%
Sea 70°F/21°C
Sunday
September 21, 2025
2 pm
71°F
22°C
Clear sky
Humidity 39%
Sea 70°F/21°C
Sunday
September 21, 2025
5 pm
70.9°F
22°C
Clear sky
Humidity 41%
Sea 70°F/21°C
Sunday
September 21, 2025
8 pm
65.4°F
19°C
Scattered clouds
Humidity 56%
Sea 70°F/21°C
Sunday
September 21, 2025
11 pm
61.9°F
17°C
Clear sky
Humidity 61%
Sea 70°F/21°C
Monday
September 22, 2025
8 am
58.6°F
15°C
Clear sky
Humidity 53%
Sea 70°F/21°C
Monday
September 22, 2025
11 am
62.7°F
18°C
Few clouds
Humidity 46%
Sea 70°F/21°C
Monday
September 22, 2025
2 pm
69.6°F
21°C
Few clouds
Humidity 31%
Sea 70°F/21°C
Monday
September 22, 2025
5 pm
70.5°F
22°C
Clear sky
Humidity 35%
Sea 70°F/21°C
Monday
September 22, 2025
8 pm
66°F
19°C
Clear sky
Humidity 49%
Sea 70°F/21°C
Monday
September 22, 2025
11 pm
62.2°F
17°C
Clear sky
Humidity 67%
Sea 70°F/21°C
Tuesday
September 23, 2025
8 am
59°F
15°C
Clear sky
Humidity 76%
Sea 70°F/21°C
Tuesday
September 23, 2025
11 am
64.6°F
19°C
Clear sky
Humidity 48%
Sea 70°F/21°C
Tuesday
September 23, 2025
2 pm
71.9°F
23°C
Clear sky
Humidity 33%
Sea 70°F/21°C
Weather uncertainties 2025 to go to Lisbon ?
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 Lisbon for a good trip to the sun!
