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August weather forecast in Keflavík

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

	756 mmHg		85%
	8 m/s		+12

27 July, Sunday. day, 12°; night, 10°; overcast

28 July, mon

	756 mmHg		85%
	8.1 m/s		+12

28 July, Monday. day, 11°; night, 10°; rain

29 July, tue

	756 mmHg		86%
	7.6 m/s		+12

29 July, Tuesday. day, 12°; night, 10°; overcast

30 July, wed

	756 mmHg		86%
	8.1 m/s		+12

30 July, Wednesday. day, 12°; night, 10°; rain

31 July, thu

	757 mmHg		85%
	7.7 m/s		+12

31 July, Thursday. day, 12°; night, 10°; overcast

1 August, fri

	757 mmHg		84%
	7.1 m/s		+12

1 August, Friday. day, 11°; night, 10°; partly cloudy

2 August, sat

	756 mmHg		84%
	7.3 m/s		+12

2 August, Saturday. day, 11°; night, 10°; partly cloudy

3 August, sun

	755 mmHg		85%
	7.8 m/s		+12

3 August, Sunday. day, 11°; night, 10°; partly cloudy

4 August, mon

	756 mmHg		83%
	7.8 m/s		+12

4 August, Monday. day, 11°; night, 10°; overcast

5 August, tue

	756 mmHg		84%
	7.8 m/s		+12

5 August, Tuesday. day, 12°; night, 10°; rain

6 August, wed

	757 mmHg		84%
	7.4 m/s		+12

6 August, Wednesday. day, 11°; night, 10°; clear

7 August, thu

	757 mmHg		84%
	7.9 m/s		+12

7 August, Thursday. day, 11°; night, 10°; rain

8 August, fri

	757 mmHg		85%
	7.9 m/s		+12

8 August, Friday. day, 12°; night, 10°; rain

9 August, sat

	756 mmHg		85%
	7.4 m/s		+12

9 August, Saturday. day, 11°; night, 10°; rain

10 August, sun

	756 mmHg		85%
	8.2 m/s		+12

10 August, Sunday. day, 11°; night, 10°; overcast

11 August, mon

	757 mmHg		85%
	7.7 m/s		+12

11 August, Monday. day, 11°; night, 10°; rain

12 August, tue

	757 mmHg		85%
	7.8 m/s		+12

12 August, Tuesday. day, 11°; night, 10°; clear

13 August, wed

	755 mmHg		84%
	7.8 m/s		+12

13 August, Wednesday. day, 11°; night, 10°; partly cloudy

14 August, thu

	754 mmHg		84%
	8.2 m/s		+12

14 August, Thursday. day, 11°; night, 10°; rain

15 August, fri

	753 mmHg		84%
	8.5 m/s		+12

15 August, Friday. day, 11°; night, 10°; rain

16 August, sat

	753 mmHg		83%
	8.8 m/s		+12

16 August, Saturday. day, 11°; night, 10°; partly cloudy

17 August, sun

	755 mmHg		82%
	8.2 m/s		+12

17 August, Sunday. day, 11°; night, 9°; clear

18 August, mon

	756 mmHg		82%
	7.8 m/s		+12

18 August, Monday. day, 11°; night, 10°; clear

19 August, tue

	756 mmHg		82%
	7.8 m/s		+12

19 August, Tuesday. day, 11°; night, 10°; partly cloudy

20 August, wed

	756 mmHg		82%
	8.3 m/s		+12

20 August, Wednesday. day, 11°; night, 10°; clear

21 August, thu

	755 mmHg		83%
	8.2 m/s		+12

21 August, Thursday. day, 11°; night, 10°; rain

22 August, fri

	755 mmHg		84%
	8.2 m/s		+12

22 August, Friday. day, 11°; night, 10°; rain

23 August, sat

	755 mmHg		85%
	8 m/s		+12

23 August, Saturday. day, 11°; night, 10°; rain

24 August, sun

	755 mmHg		85%
	8.1 m/s		+12

24 August, Sunday. day, 11°; night, 10°; partly cloudy

25 August, mon

	756 mmHg		83%
	8.7 m/s		+12

25 August, Monday. day, 11°; night, 9°; rain

26 August, tue

	755 mmHg		83%
	8.5 m/s		+12

26 August, Tuesday. day, 11°; night, 9°; rain

27 August, wed

	755 mmHg		81%
	8.5 m/s		+12

27 August, Wednesday. day, 11°; night, 9°; overcast

28 August, thu

	755 mmHg		82%
	8.8 m/s		+11

28 August, Thursday. day, 10°; night, 9°; rain

29 August, fri

	756 mmHg		82%
	8.89 m/s		+12

29 August, Friday. day, 10°; night, 9°; overcast

30 August, sat

	755 mmHg		84%
	10 m/s		+11

30 August, Saturday. day, 11°; night, 9°; rain

31 August, sun

	753 mmHg		84%
	10.8 m/s		+11

31 August, Sunday. day, 11°; night, 9°; rain

1 September, mon

	752 mmHg		83%
	9.8 m/s		+11

1 September, Monday. day, 11°; night, 9°; rain

2 September, tue

	753 mmHg		81%
	9.8 m/s		+11

2 September, Tuesday. day, 11°; night, 9°; rain

3 September, wed

	754 mmHg		84%
	9.7 m/s		+11

3 September, Wednesday. day, 11°; night, 9°; rain

4 September, thu

	754 mmHg		84%
	10 m/s		+11

4 September, Thursday. day, 10°; night, 9°; rain

5 September, fri

	755 mmHg		83%
	9.3 m/s		+11

5 September, Friday. day, 10°; night, 9°; clear

6 September, sat

	755 mmHg		83%
	9.5 m/s		+11

6 September, Saturday. day, 10°; night, 9°; overcast

Average data for 10 years

Keflavík August

5

sunny days

15

days with precipitation

15

cloudy days

5 sunny days; 15 days with precipitation; 15 cloudy days;

84

%

air humidity

6.1

m/s

WindS

107

mm of precipitation

(8% of annual average)

+12

°C

Water temperature

air humidity 84%; 107 millimeters of precipitation (8% of annual average); Wind southerly 6.1 Meters per second; Water temperature +12°

Weather graphs for August

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

S

SW

S

S

S

SW

S

S

S

S

S

S

S

S

S

S

S

S

S

SE

SE

S

S

S

S

S

S

SE

S

S

S

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

Reykyavik
Torshavn
Akureyri
Isafjordur
Jan Mayen
Selfoss
Vestmannaeyjar
Borgarnes
Akranes

Cities with similar weather in August

Cholpon-Ata
Sydney
Dublin
Buenos Aires
Melbourne
Wellington
Auckland
Capetown
Nuuk

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

August in Keflavík is the warmest month of the year. In August, the weather in Keflavík is typically warm. Average daily high temperature in August is about 11 degrees above zero. On average, Keflavík has 15 rainy, 7 partly cloudy, 5 sunny, and 4 cloudy days in August. The rains are usually heavy. August as well as January, February, March, and April is considered the most uncomfortable time to visit Keflavík.

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