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September weather forecast in Portimão

30 days Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

30 days Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Sun

Sunday

Mon

Monday

Tue

Tuesday

Wed

Wednesday

Thu

Thursday

Fri

Friday

Sat

Saturday

31 August, sun

	754 mmHg		70%
	5.7 m/s		+21

31 August, Sunday. day, 26°; night, 18°; partly cloudy

1 September, mon

	754 mmHg		71%
	5.8 m/s		+21

1 September, Monday. day, 26°; night, 18°; clear

2 September, tue

	754 mmHg		71%
	5.4 m/s		+21

2 September, Tuesday. day, 25°; night, 17°; clear

3 September, wed

	755 mmHg		69%
	5.2 m/s		+21

3 September, Wednesday. day, 25°; night, 18°; clear

4 September, thu

	755 mmHg		69%
	5.3 m/s		+21

4 September, Thursday. day, 26°; night, 18°; clear

5 September, fri

	755 mmHg		71%
	5.5 m/s		+21

5 September, Friday. day, 25°; night, 17°; clear

6 September, sat

	754 mmHg		71%
	5.3 m/s		+21

6 September, Saturday. day, 25°; night, 18°; clear

7 September, sun

	754 mmHg		72%
	5.5 m/s		+21

7 September, Sunday. day, 25°; night, 18°; clear

8 September, mon

	755 mmHg		72%
	5.4 m/s		+21

8 September, Monday. day, 25°; night, 17°; clear

9 September, tue

	755 mmHg		71%
	5.5 m/s		+21

9 September, Tuesday. day, 26°; night, 18°; clear

10 September, wed

	755 mmHg		70%
	5.6 m/s		+21

10 September, Wednesday. day, 25°; night, 17°; clear

11 September, thu

	755 mmHg		71%
	5.6 m/s		+21

11 September, Thursday. day, 25°; night, 17°; clear

12 September, fri

	755 mmHg		71%
	6.1 m/s		+21

12 September, Friday. day, 25°; night, 17°; clear

13 September, sat

	755 mmHg		71%
	6 m/s		+21

13 September, Saturday. day, 25°; night, 17°; partly cloudy

14 September, sun

	755 mmHg		72%
	5.8 m/s		+21

14 September, Sunday. day, 25°; night, 17°; partly cloudy

15 September, mon

	754 mmHg		73%
	5.8 m/s		+21

15 September, Monday. day, 24°; night, 17°; clear

16 September, tue

	754 mmHg		74%
	5.3 m/s		+21

16 September, Tuesday. day, 24°; night, 17°; rain

17 September, wed

	753 mmHg		74%
	5.5 m/s		+21

17 September, Wednesday. day, 24°; night, 17°; clear

18 September, thu

	754 mmHg		74%
	6.1 m/s		+21

18 September, Thursday. day, 24°; night, 17°; clear

19 September, fri

	755 mmHg		73%
	5.4 m/s		+21

19 September, Friday. day, 24°; night, 17°; clear

20 September, sat

	755 mmHg		75%
	4.6 m/s		+21

20 September, Saturday. day, 24°; night, 17°; rain

21 September, sun

	755 mmHg		76%
	5.5 m/s		+21

21 September, Sunday. day, 24°; night, 17°; rain

22 September, mon

	755 mmHg		74%
	5 m/s		+21

22 September, Monday. day, 24°; night, 17°; partly cloudy

23 September, tue

	755 mmHg		76%
	5.2 m/s		+21

23 September, Tuesday. day, 24°; night, 16°; clear

24 September, wed

	755 mmHg		74%
	5.4 m/s		+21

24 September, Wednesday. day, 24°; night, 16°; partly cloudy

25 September, thu

	756 mmHg		75%
	5.7 m/s		+21

25 September, Thursday. day, 23°; night, 16°; overcast

26 September, fri

	756 mmHg		74%
	5.3 m/s		+21

26 September, Friday. day, 24°; night, 16°; partly cloudy

27 September, sat

	755 mmHg		73%
	5 m/s		+21

27 September, Saturday. day, 24°; night, 16°; partly cloudy

28 September, sun

	755 mmHg		74%
	5.1 m/s		+21

28 September, Sunday. day, 24°; night, 16°; partly cloudy

29 September, mon

	755 mmHg		73%
	5.4 m/s		+21

29 September, Monday. day, 24°; night, 17°; rain

30 September, tue

	755 mmHg		74%
	5.5 m/s		+21

30 September, Tuesday. day, 24°; night, 17°; partly cloudy

1 October, wed

	756 mmHg		75%
	5.3 m/s		+21

1 October, Wednesday. day, 24°; night, 16°; clear

2 October, thu

	755 mmHg		75%
	5.3 m/s		+21

2 October, Thursday. day, 24°; night, 16°; clear

3 October, fri

	756 mmHg		75%
	5.3 m/s		+21

3 October, Friday. day, 23°; night, 16°; clear

4 October, sat

	756 mmHg		73%
	5 m/s		+21

4 October, Saturday. day, 24°; night, 16°; clear

Average data for 10 years

Portimão September

17

sunny days

4

days with precipitation

1

cloudy day

17 sunny days; 4 days with precipitation; 1 cloudy day;

73

%

air humidity

3.6

m/s

WindSW

24

mm of precipitation

(5% of annual average)

+21

°C

Water temperature

air humidity 73%; 24 millimeters of precipitation (5% of annual average); Wind south-westerly 3.6 Meters per second; Water temperature +21°

Weather graphs for September

TemperatureWater temperaturePrecipitation chance, %Humidity, %Wind, m/sPressure, mmHg

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W

W

W

W

W

W

W

W

W

W

W

SW

W

W

SW

W

W

SW

SW

SW

SW

W

W

W

SW

SW

SW

SW

SW

1

Average data for 10 years

2

3

4

5

6

7

8

9

10

11

12

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14

15

16

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20

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29

30

Daytime temperature

Night-time temperature

Cities near you

Lisbon
Casablanca
Rabat
Seville
Marbella
Tangier
Chefchaouen
Cadiz
Cascais

Cities with similar weather in September

Istanbul
Batumi
Nice
Kobuleti
Santa Cruz de Tenerife
Funchal
Costa Brava
Marbella
Playa de las Americas

The weather forecast for September 2025 is based on historical data from the past 10 years.

In September, the weather in Portimão is typically warm. Average daily high temperature in September is about 25 degrees above zero. On average, Portimão has 17 sunny, 8 partly cloudy, 4 rainy, and 1 cloudy day in September. The rains are usually light.

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