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August weather forecast in Belfast

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

	747 mmHg		82%
	4.4 m/s		+15

27 July, Sunday. day, 18°; night, 12°; partly cloudy

28 July, mon

	747 mmHg		85%
	5.3 m/s		+15

28 July, Monday. day, 17°; night, 12°; rain

29 July, tue

	747 mmHg		84%
	5.6 m/s		+15

29 July, Tuesday. day, 17°; night, 12°; rain

30 July, wed

	748 mmHg		84%
	5.5 m/s		+14

30 July, Wednesday. day, 17°; night, 12°; rain

31 July, thu

	747 mmHg		84%
	5.7 m/s		+14

31 July, Thursday. day, 17°; night, 12°; rain

1 August, fri

	747 mmHg		83%
	5.3 m/s		+15

1 August, Friday. day, 17°; night, 12°; partly cloudy

2 August, sat

	747 mmHg		85%
	5.4 m/s		+14

2 August, Saturday. day, 17°; night, 12°; rain

3 August, sun

	747 mmHg		84%
	5.5 m/s		+14

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

4 August, mon

	748 mmHg		83%
	5.4 m/s		+15

4 August, Monday. day, 18°; night, 12°; rain

5 August, tue

	748 mmHg		84%
	5.4 m/s		+15

5 August, Tuesday. day, 17°; night, 12°; rain

6 August, wed

	748 mmHg		86%
	4.9 m/s		+15

6 August, Wednesday. day, 17°; night, 12°; rain

7 August, thu

	749 mmHg		84%
	4.8 m/s		+15

7 August, Thursday. day, 17°; night, 12°; partly cloudy

8 August, fri

	749 mmHg		83%
	5.1 m/s		+15

8 August, Friday. day, 17°; night, 11°; partly cloudy

9 August, sat

	749 mmHg		82%
	5.6 m/s		+15

9 August, Saturday. day, 17°; night, 12°; partly cloudy

10 August, sun

	749 mmHg		83%
	5.2 m/s		+14

10 August, Sunday. day, 17°; night, 12°; clear

11 August, mon

	748 mmHg		85%
	5.7 m/s		+15

11 August, Monday. day, 17°; night, 12°; overcast

12 August, tue

	747 mmHg		84%
	5.7 m/s		+15

12 August, Tuesday. day, 17°; night, 13°; rain

13 August, wed

	748 mmHg		84%
	5.2 m/s		+15

13 August, Wednesday. day, 17°; night, 12°; partly cloudy

14 August, thu

	747 mmHg		86%
	5.1 m/s		+15

14 August, Thursday. day, 17°; night, 12°; rain

15 August, fri

	748 mmHg		83%
	5.2 m/s		+14

15 August, Friday. day, 17°; night, 12°; partly cloudy

16 August, sat

	747 mmHg		83%
	5.6 m/s		+14

16 August, Saturday. day, 17°; night, 12°; rain

17 August, sun

	746 mmHg		84%
	5.8 m/s		+15

17 August, Sunday. day, 17°; night, 12°; rain

18 August, mon

	745 mmHg		84%
	5.4 m/s		+15

18 August, Monday. day, 17°; night, 12°; rain

19 August, tue

	745 mmHg		85%
	6.2 m/s		+15

19 August, Tuesday. day, 17°; night, 12°; partly cloudy

20 August, wed

	747 mmHg		83%
	5.8 m/s		+15

20 August, Wednesday. day, 17°; night, 12°; rain

21 August, thu

	748 mmHg		83%
	6 m/s		+14

21 August, Thursday. day, 17°; night, 12°; rain

22 August, fri

	749 mmHg		84%
	5.3 m/s		+15

22 August, Friday. day, 17°; night, 12°; rain

23 August, sat

	748 mmHg		86%
	5.3 m/s		+14

23 August, Saturday. day, 17°; night, 12°; rain

24 August, sun

	747 mmHg		82%
	4.9 m/s		+15

24 August, Sunday. day, 17°; night, 11°; partly cloudy

25 August, mon

	747 mmHg		84%
	5.5 m/s		+15

25 August, Monday. day, 16°; night, 11°; rain

26 August, tue

	748 mmHg		85%
	5.7 m/s		+15

26 August, Tuesday. day, 16°; night, 11°; rain

27 August, wed

	749 mmHg		84%
	5.6 m/s		+14

27 August, Wednesday. day, 16°; night, 11°; partly cloudy

28 August, thu

	749 mmHg		82%
	5.7 m/s		+14

28 August, Thursday. day, 16°; night, 11°; partly cloudy

29 August, fri

	750 mmHg		81%
	6.1 m/s		+15

29 August, Friday. day, 16°; night, 11°; clear

30 August, sat

	752 mmHg		83%
	5.4 m/s		+15

30 August, Saturday. day, 16°; night, 11°; partly cloudy

31 August, sun

	751 mmHg		83%
	5.3 m/s		+14

31 August, Sunday. day, 16°; night, 11°; rain

1 September, mon

	751 mmHg		84%
	5.4 m/s		+15

1 September, Monday. day, 17°; night, 11°; overcast

2 September, tue

	750 mmHg		85%
	5.2 m/s		+15

2 September, Tuesday. day, 16°; night, 12°; overcast

3 September, wed

	749 mmHg		85%
	5.6 m/s		+14

3 September, Wednesday. day, 16°; night, 12°; overcast

4 September, thu

	750 mmHg		84%
	5.6 m/s		+14

4 September, Thursday. day, 17°; night, 12°; rain

5 September, fri

	750 mmHg		84%
	5.9 m/s		+14

5 September, Friday. day, 16°; night, 12°; rain

6 September, sat

	749 mmHg		84%
	6 m/s		+14

6 September, Saturday. day, 16°; night, 12°; rain

Average data for 10 years

Belfast August

2

sunny days

17

days with precipitation

13

cloudy days

2 sunny days; 17 days with precipitation; 13 cloudy days;

84

%

air humidity

3.9

m/s

WindSW

95

mm of precipitation

(10% of annual average)

+15

°C

Water temperature

air humidity 84%; 95 millimeters of precipitation (10% of annual average); Wind south-westerly 3.9 Meters per second; Water temperature +15°

Weather graphs for August

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

SW

S

SW

SW

S

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

S

S

SW

SW

SW

SW

SW

SW

SW

SW

SW

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

Dublin
Edinburgh
Manchester
Liverpool
Carrickfinn
Glasgow
Cork
Galway
Wicklow

Cities with similar weather in August

Tallinn
Cholpon-Ata
Sydney
Reykyavik
Oslo
San Francisco
Palanga
Buenos Aires
Auckland

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

In August, the weather in Belfast is typically warm. Average daily high temperature in August is about 17 degrees above zero. On average, Belfast has 17 rainy, 11 partly cloudy, 2 sunny, and 1 cloudy day in August. The rains are usually heavy. August as well as January, February, March, and April is considered the most uncomfortable time to visit Belfast.

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