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August weather forecast in Cardiff

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

	754 mmHg		80%
	5.7 m/s		+19

27 July, Sunday. day, 19°; night, 14°; overcast

28 July, mon

	754 mmHg		80%
	5.6 m/s		+18

28 July, Monday. day, 19°; night, 13°; rain

29 July, tue

	754 mmHg		80%
	5.8 m/s		+18

29 July, Tuesday. day, 19°; night, 13°; rain

30 July, wed

	755 mmHg		80%
	6 m/s		+18

30 July, Wednesday. day, 19°; night, 14°; rain

31 July, thu

	755 mmHg		80%
	5.7 m/s		+18

31 July, Thursday. day, 19°; night, 14°; rain

1 August, fri

	754 mmHg		80%
	5.2 m/s		+18

1 August, Friday. day, 19°; night, 14°; rain

2 August, sat

	754 mmHg		80%
	5.6 m/s		+18

2 August, Saturday. day, 20°; night, 14°; rain

3 August, sun

	755 mmHg		79%
	5.8 m/s		+17

3 August, Sunday. day, 19°; night, 14°; rain

4 August, mon

	756 mmHg		80%
	5.8 m/s		+18

4 August, Monday. day, 19°; night, 13°; rain

5 August, tue

	755 mmHg		80%
	5.8 m/s		+18

5 August, Tuesday. day, 20°; night, 14°; rain

6 August, wed

	755 mmHg		81%
	5.8 m/s		+19

6 August, Wednesday. day, 19°; night, 14°; rain

7 August, thu

	755 mmHg		79%
	5.4 m/s		+19

7 August, Thursday. day, 20°; night, 13°; clear

8 August, fri

	755 mmHg		79%
	5.1 m/s		+18

8 August, Friday. day, 20°; night, 13°; clear

9 August, sat

	756 mmHg		79%
	5.3 m/s		+18

9 August, Saturday. day, 20°; night, 13°; clear

10 August, sun

	756 mmHg		79%
	5.9 m/s		+18

10 August, Sunday. day, 20°; night, 14°; clear

11 August, mon

	755 mmHg		79%
	5.5 m/s		+18

11 August, Monday. day, 20°; night, 14°; partly cloudy

12 August, tue

	755 mmHg		80%
	5.8 m/s		+18

12 August, Tuesday. day, 19°; night, 14°; partly cloudy

13 August, wed

	755 mmHg		81%
	6.1 m/s		+17

13 August, Wednesday. day, 19°; night, 14°; overcast

14 August, thu

	755 mmHg		82%
	5.4 m/s		+19

14 August, Thursday. day, 19°; night, 14°; rain

15 August, fri

	755 mmHg		80%
	5.5 m/s		+19

15 August, Friday. day, 19°; night, 13°; rain

16 August, sat

	755 mmHg		80%
	5.4 m/s		+18

16 August, Saturday. day, 19°; night, 13°; partly cloudy

17 August, sun

	753 mmHg		80%
	5.7 m/s		+18

17 August, Sunday. day, 19°; night, 13°; rain

18 August, mon

	752 mmHg		82%
	6.1 m/s		+18

18 August, Monday. day, 19°; night, 14°; rain

19 August, tue

	753 mmHg		81%
	6.4 m/s		+18

19 August, Tuesday. day, 19°; night, 14°; partly cloudy

20 August, wed

	755 mmHg		81%
	6.1 m/s		+18

20 August, Wednesday. day, 18°; night, 14°; rain

21 August, thu

	757 mmHg		82%
	6 m/s		+19

21 August, Thursday. day, 18°; night, 13°; overcast

22 August, fri

	756 mmHg		81%
	5.6 m/s		+18

22 August, Friday. day, 19°; night, 14°; overcast

23 August, sat

	755 mmHg		82%
	5.8 m/s		+18

23 August, Saturday. day, 19°; night, 14°; rain

24 August, sun

	754 mmHg		81%
	6.1 m/s		+18

24 August, Sunday. day, 18°; night, 13°; rain

25 August, mon

	754 mmHg		81%
	6.3 m/s		+18

25 August, Monday. day, 18°; night, 13°; rain

26 August, tue

	755 mmHg		82%
	6.2 m/s		+18

26 August, Tuesday. day, 18°; night, 13°; overcast

27 August, wed

	755 mmHg		79%
	5.7 m/s		+18

27 August, Wednesday. day, 18°; night, 13°; partly cloudy

28 August, thu

	756 mmHg		80%
	5.3 m/s		+18

28 August, Thursday. day, 18°; night, 12°; partly cloudy

29 August, fri

	757 mmHg		79%
	5.8 m/s		+17

29 August, Friday. day, 18°; night, 12°; clear

30 August, sat

	758 mmHg		78%
	5.1 m/s		+18

30 August, Saturday. day, 18°; night, 12°; partly cloudy

31 August, sun

	758 mmHg		78%
	5.4 m/s		+18

31 August, Sunday. day, 18°; night, 12°; partly cloudy

1 September, mon

	758 mmHg		79%
	5.1 m/s		+19

1 September, Monday. day, 18°; night, 12°; partly cloudy

2 September, tue

	757 mmHg		81%
	5.3 m/s		+17

2 September, Tuesday. day, 18°; night, 12°; partly cloudy

3 September, wed

	757 mmHg		82%
	5.8 m/s		+18

3 September, Wednesday. day, 18°; night, 13°; rain

4 September, thu

	757 mmHg		80%
	5.4 m/s		+17

4 September, Thursday. day, 18°; night, 13°; partly cloudy

5 September, fri

	756 mmHg		82%
	5.7 m/s		+17

5 September, Friday. day, 19°; night, 12°; rain

6 September, sat

	756 mmHg		82%
	5.8 m/s		+17

6 September, Saturday. day, 18°; night, 13°; rain

Average data for 10 years

Cardiff August

5

sunny days

14

days with precipitation

8

cloudy days

5 sunny days; 14 days with precipitation; 8 cloudy days;

80

%

air humidity

4.1

m/s

WindSW

91

mm of precipitation

(9% of annual average)

+18

°C

Water temperature

air humidity 80%; 91 millimeters of precipitation (9% of annual average); Wind south-westerly 4.1 Meters per second; Water temperature +18°

Weather graphs for August

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

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

S

SW

SW

SW

SW

SW

SW

SW

SW

SW

S

SW

SW

SW

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

London
Dublin
Manchester
Brest
Liverpool
Trowbridge
Oxford
Le Havre
Bournemouth

Cities with similar weather in August

Helsinki
Tallinn
Stockholm
Sydney
Oslo
San Francisco
Yurmala
Palanga
Copenhagen

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

August in Cardiff is the warmest month of the year. In August, the weather in Cardiff is typically warm. Average daily high temperature in August is about 19 degrees above zero. On average, Cardiff has 14 rainy, 8 partly cloudy, 5 sunny, and 4 cloudy days in August. The rains are usually heavy.

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