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August weather forecast in Sintra

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

27 July, sun

	762 mmHg		90%
	8.3 m/s		+21

27 July, Sunday. day, 18°; night, 18°; clear

28 July, mon

	763 mmHg		90%
	8.3 m/s		+22

28 July, Monday. day, 18°; night, 18°; clear

29 July, tue

	763 mmHg		90%
	8.3 m/s		+22

29 July, Tuesday. day, 18°; night, 18°; clear

30 July, wed

	763 mmHg		91%
	8 m/s		+21

30 July, Wednesday. day, 18°; night, 18°; clear

31 July, thu

	762 mmHg		91%
	8.39 m/s		+21

31 July, Thursday. day, 18°; night, 18°; partly cloudy

1 August, fri

	762 mmHg		90%
	8.6 m/s		+21

1 August, Friday. day, 18°; night, 18°; partly cloudy

2 August, sat

	763 mmHg		89%
	8.8 m/s		+22

2 August, Saturday. day, 18°; night, 18°; clear

3 August, sun

	763 mmHg		89%
	8.7 m/s		+22

3 August, Sunday. day, 19°; night, 18°; clear

4 August, mon

	763 mmHg		88%
	8.2 m/s		+21

4 August, Monday. day, 19°; night, 18°; clear

5 August, tue

	763 mmHg		89%
	8 m/s		+21

5 August, Tuesday. day, 19°; night, 18°; clear

6 August, wed

	762 mmHg		89%
	7.9 m/s		+22

6 August, Wednesday. day, 19°; night, 18°; clear

7 August, thu

	762 mmHg		88%
	8.2 m/s		+22

7 August, Thursday. day, 19°; night, 18°; rain

8 August, fri

	762 mmHg		89%
	8 m/s		+23

8 August, Friday. day, 18°; night, 18°; clear

9 August, sat

	762 mmHg		89%
	7.6 m/s		+23

9 August, Saturday. day, 19°; night, 18°; clear

10 August, sun

	762 mmHg		90%
	7.4 m/s		+22

10 August, Sunday. day, 19°; night, 18°; clear

11 August, mon

	763 mmHg		90%
	7.5 m/s		+22

11 August, Monday. day, 19°; night, 18°; clear

12 August, tue

	763 mmHg		91%
	7.9 m/s		+22

12 August, Tuesday. day, 19°; night, 18°; clear

13 August, wed

	763 mmHg		89%
	8.2 m/s		+22

13 August, Wednesday. day, 18°; night, 18°; clear

14 August, thu

	762 mmHg		90%
	8.2 m/s		+22

14 August, Thursday. day, 18°; night, 18°; clear

15 August, fri

	763 mmHg		91%
	7.6 m/s		+21

15 August, Friday. day, 18°; night, 18°; partly cloudy

16 August, sat

	763 mmHg		91%
	7.7 m/s		+21

16 August, Saturday. day, 18°; night, 18°; clear

17 August, sun

	762 mmHg		91%
	8.1 m/s		+21

17 August, Sunday. day, 18°; night, 18°; clear

18 August, mon

	762 mmHg		91%
	8 m/s		+22

18 August, Monday. day, 18°; night, 18°; partly cloudy

19 August, tue

	763 mmHg		89%
	7.9 m/s		+22

19 August, Tuesday. day, 18°; night, 18°; partly cloudy

20 August, wed

	763 mmHg		89%
	8.39 m/s		+21

20 August, Wednesday. day, 19°; night, 18°; clear

21 August, thu

	763 mmHg		90%
	7.9 m/s		+22

21 August, Thursday. day, 18°; night, 18°; clear

22 August, fri

	763 mmHg		91%
	7.7 m/s		+21

22 August, Friday. day, 18°; night, 18°; clear

23 August, sat

	762 mmHg		91%
	8.1 m/s		+21

23 August, Saturday. day, 18°; night, 18°; partly cloudy

24 August, sun

	762 mmHg		90%
	8.1 m/s		+22

24 August, Sunday. day, 18°; night, 18°; partly cloudy

25 August, mon

	762 mmHg		89%
	8 m/s		+22

25 August, Monday. day, 18°; night, 18°; clear

26 August, tue

	763 mmHg		91%
	7.5 m/s		+22

26 August, Tuesday. day, 18°; night, 18°; partly cloudy

27 August, wed

	763 mmHg		91%
	7.4 m/s		+22

27 August, Wednesday. day, 18°; night, 18°; partly cloudy

28 August, thu

	763 mmHg		91%
	7.6 m/s		+23

28 August, Thursday. day, 18°; night, 18°; partly cloudy

29 August, fri

	763 mmHg		89%
	7.5 m/s		+22

29 August, Friday. day, 18°; night, 18°; clear

30 August, sat

	763 mmHg		90%
	7.5 m/s		+22

30 August, Saturday. day, 18°; night, 18°; clear

31 August, sun

	762 mmHg		90%
	7.3 m/s		+22

31 August, Sunday. day, 19°; night, 18°; overcast

1 September, mon

	762 mmHg		89%
	7.2 m/s		+22

1 September, Monday. day, 19°; night, 18°; clear

2 September, tue

	762 mmHg		89%
	7.1 m/s		+22

2 September, Tuesday. day, 18°; night, 18°; clear

3 September, wed

	763 mmHg		89%
	6.6 m/s		+22

3 September, Wednesday. day, 19°; night, 18°; clear

4 September, thu

	763 mmHg		90%
	7.2 m/s		+23

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

5 September, fri

	763 mmHg		89%
	7.5 m/s		+22

5 September, Friday. day, 19°; night, 18°; clear

6 September, sat

	762 mmHg		89%
	7.2 m/s		+22

6 September, Saturday. day, 19°; night, 18°; clear

Average data for 10 years

Sintra August

20

sunny days

1

day with precipitation

1

cloudy day

20 sunny days; 1 day with precipitation; 1 cloudy day;

90

%

air humidity

6.3

m/s

WindW

6

mm of precipitation

(1% of annual average)

+22

°C

Water temperature

air humidity 90%; 6 millimeters of precipitation (1% of annual average); Wind westerly 6.3 Meters per second; Water temperature +22°

Weather graphs for August

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

W

W

W

SW

W

W

W

W

SW

SW

W

W

W

W

W

W

W

W

W

SW

SW

W

W

W

SW

W

SW

W

W

W

SW

1

Average data for 10 years

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Daytime temperature

Night-time temperature

Cities near you

Lisbon
Porto
Seville
Cadiz
Cascais
Faro
Setúbal
Felgueiras
Figueira da foz

Cities with similar weather in August

Vancouver
Santa Cruz de Tenerife
Funchal
Seattle
Las Palmas de Gran Canaria
Playa de las Americas
Montreal
Port Louis
San Sebastian

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

In August, the weather in Sintra is typically warm. Average daily high temperature in August is about 18 degrees above zero. On average, Sintra has 20 sunny, 9 partly cloudy, 1 rainy, and 1 cloudy day in August. The rains are usually light. August as well as July is considered the most comfortable time to visit Sintra.

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