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August weather forecast in Friday Harbor

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

	761 mmHg		80%
	4.69 m/s		+15

27 July, Sunday. day, 18°; night, 15°; clear

28 July, mon

	761 mmHg		80%
	4.69 m/s		+15

28 July, Monday. day, 18°; night, 15°; clear

29 July, tue

	761 mmHg		80%
	5 m/s		+14

29 July, Tuesday. day, 18°; night, 15°; clear

30 July, wed

	761 mmHg		79%
	4.8 m/s		+14

30 July, Wednesday. day, 18°; night, 15°; clear

31 July, thu

	761 mmHg		79%
	4.9 m/s		+14

31 July, Thursday. day, 18°; night, 15°; clear

1 August, fri

	762 mmHg		80%
	5 m/s		+14

1 August, Friday. day, 18°; night, 15°; clear

2 August, sat

	762 mmHg		80%
	5 m/s		+14

2 August, Saturday. day, 18°; night, 15°; clear

3 August, sun

	762 mmHg		81%
	4.69 m/s		+15

3 August, Sunday. day, 17°; night, 15°; clear

4 August, mon

	761 mmHg		80%
	4.3 m/s		+14

4 August, Monday. day, 18°; night, 15°; clear

5 August, tue

	760 mmHg		80%
	5 m/s		+14

5 August, Tuesday. day, 18°; night, 15°; clear

6 August, wed

	760 mmHg		81%
	5.2 m/s		+14

6 August, Wednesday. day, 18°; night, 15°; partly cloudy

7 August, thu

	761 mmHg		84%
	4.8 m/s		+14

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

8 August, fri

	761 mmHg		82%
	5 m/s		+14

8 August, Friday. day, 17°; night, 15°; clear

9 August, sat

	761 mmHg		82%
	4.8 m/s		+14

9 August, Saturday. day, 18°; night, 15°; clear

10 August, sun

	761 mmHg		81%
	4.8 m/s		+15

10 August, Sunday. day, 18°; night, 15°; partly cloudy

11 August, mon

	761 mmHg		82%
	4.9 m/s		+15

11 August, Monday. day, 18°; night, 15°; clear

12 August, tue

	762 mmHg		80%
	4.8 m/s		+15

12 August, Tuesday. day, 18°; night, 15°; clear

13 August, wed

	762 mmHg		79%
	4.6 m/s		+15

13 August, Wednesday. day, 19°; night, 15°; clear

14 August, thu

	761 mmHg		78%
	4.6 m/s		+15

14 August, Thursday. day, 18°; night, 16°; clear

15 August, fri

	761 mmHg		79%
	5.1 m/s		+15

15 August, Friday. day, 18°; night, 15°; clear

16 August, sat

	761 mmHg		80%
	5.2 m/s		+15

16 August, Saturday. day, 18°; night, 15°; clear

17 August, sun

	761 mmHg		80%
	4.5 m/s		+15

17 August, Sunday. day, 18°; night, 15°; clear

18 August, mon

	761 mmHg		81%
	5.1 m/s		+15

18 August, Monday. day, 18°; night, 15°; clear

19 August, tue

	761 mmHg		81%
	4.69 m/s		+14

19 August, Tuesday. day, 17°; night, 15°; clear

20 August, wed

	760 mmHg		80%
	5 m/s		+14

20 August, Wednesday. day, 17°; night, 15°; partly cloudy

21 August, thu

	760 mmHg		82%
	5.3 m/s		+14

21 August, Thursday. day, 17°; night, 15°; rain

22 August, fri

	761 mmHg		81%
	5 m/s		+14

22 August, Friday. day, 17°; night, 14°; clear

23 August, sat

	761 mmHg		82%
	4.69 m/s		+15

23 August, Saturday. day, 17°; night, 14°; partly cloudy

24 August, sun

	761 mmHg		82%
	4.9 m/s		+14

24 August, Sunday. day, 17°; night, 14°; partly cloudy

25 August, mon

	760 mmHg		79%
	4.8 m/s		+14

25 August, Monday. day, 17°; night, 15°; partly cloudy

26 August, tue

	760 mmHg		79%
	4.69 m/s		+14

26 August, Tuesday. day, 17°; night, 15°; rain

27 August, wed

	761 mmHg		80%
	5 m/s		+14

27 August, Wednesday. day, 17°; night, 14°; clear

28 August, thu

	761 mmHg		80%
	4.19 m/s		+14

28 August, Thursday. day, 17°; night, 15°; partly cloudy

29 August, fri

	760 mmHg		81%
	5.2 m/s		+15

29 August, Friday. day, 17°; night, 15°; rain

30 August, sat

	760 mmHg		83%
	5.3 m/s		+14

30 August, Saturday. day, 17°; night, 14°; overcast

31 August, sun

	761 mmHg		82%
	5 m/s		+15

31 August, Sunday. day, 16°; night, 14°; partly cloudy

1 September, mon

	761 mmHg		81%
	4.9 m/s		+15

1 September, Monday. day, 17°; night, 14°; clear

2 September, tue

	761 mmHg		81%
	4.6 m/s		+15

2 September, Tuesday. day, 17°; night, 14°; clear

3 September, wed

	761 mmHg		80%
	4.5 m/s		+14

3 September, Wednesday. day, 17°; night, 14°; clear

4 September, thu

	761 mmHg		81%
	4.4 m/s		+15

4 September, Thursday. day, 17°; night, 14°; clear

5 September, fri

	762 mmHg		81%
	4.69 m/s		+14

5 September, Friday. day, 16°; night, 14°; clear

6 September, sat

	762 mmHg		81%
	5 m/s		+15

6 September, Saturday. day, 17°; night, 14°; clear

Average data for 10 years

Friday Harbor August

18

sunny days

4

days with precipitation

2

cloudy days

18 sunny days; 4 days with precipitation; 2 cloudy days;

81

%

air humidity

3.1

m/s

WindS

29

mm of precipitation

(3% of annual average)

+14

°C

Water temperature

air humidity 81%; 29 millimeters of precipitation (3% of annual average); Wind southerly 3.1 Meters per second; Water temperature +14°

Weather graphs for August

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

S

S

S

S

S

S

S

S

S

S

S

SW

SW

SW

SW

S

S

S

S

S

S

SW

SW

S

SW

S

S

SW

S

S

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

Vancouver
Seattle
Portland
Salem
Victoria
Vancouver
Mount Ranier National Park
Courtenay
Kelowna

Cities with similar weather in August

Stockholm
Copenhagen
Gdansk
Lima
Bruges
San Sebastian
San Jose
Rostock
Santander

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

August in Friday Harbor is the warmest month of the year. In August, the weather in Friday Harbor is typically warm. Average daily high temperature in August is about 17 degrees above zero. On average, Friday Harbor has 18 sunny, 8 partly cloudy, 4 rainy, and 1 cloudy day in August. The rains are usually moderate. August as well as July is considered the most comfortable time to visit Friday Harbor.

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