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August weather forecast in Nantucket

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		85%
	7.8 m/s		+21

27 July, Sunday. day, 22°; night, 20°; clear

28 July, mon

	761 mmHg		89%
	7.6 m/s		+21

28 July, Monday. day, 22°; night, 20°; rain

29 July, tue

	761 mmHg		88%
	7.7 m/s		+21

29 July, Tuesday. day, 22°; night, 20°; partly cloudy

30 July, wed

	761 mmHg		85%
	7.6 m/s		+21

30 July, Wednesday. day, 22°; night, 20°; clear

31 July, thu

	763 mmHg		84%
	6.6 m/s		+21

31 July, Thursday. day, 21°; night, 20°; clear

1 August, fri

	762 mmHg		85%
	7.2 m/s		+21

1 August, Friday. day, 22°; night, 20°; clear

2 August, sat

	762 mmHg		86%
	7.3 m/s		+21

2 August, Saturday. day, 22°; night, 21°; clear

3 August, sun

	762 mmHg		87%
	7.3 m/s		+21

3 August, Sunday. day, 22°; night, 21°; clear

4 August, mon

	762 mmHg		89%
	7.3 m/s		+21

4 August, Monday. day, 22°; night, 21°; partly cloudy

5 August, tue

	762 mmHg		88%
	7.7 m/s		+21

5 August, Tuesday. day, 22°; night, 20°; partly cloudy

6 August, wed

	762 mmHg		85%
	7.4 m/s		+21

6 August, Wednesday. day, 22°; night, 21°; rain

7 August, thu

	762 mmHg		83%
	7.7 m/s		+21

7 August, Thursday. day, 22°; night, 20°; overcast

8 August, fri

	762 mmHg		84%
	7.9 m/s		+21

8 August, Friday. day, 22°; night, 20°; rain

9 August, sat

	762 mmHg		85%
	7.8 m/s		+21

9 August, Saturday. day, 22°; night, 21°; clear

10 August, sun

	761 mmHg		85%
	7.9 m/s		+21

10 August, Sunday. day, 22°; night, 21°; rain

11 August, mon

	761 mmHg		86%
	7.7 m/s		+21

11 August, Monday. day, 22°; night, 21°; rain

12 August, tue

	761 mmHg		87%
	7.1 m/s		+21

12 August, Tuesday. day, 22°; night, 20°; overcast

13 August, wed

	761 mmHg		87%
	7.6 m/s		+21

13 August, Wednesday. day, 22°; night, 21°; rain

14 August, thu

	761 mmHg		86%
	7.3 m/s		+21

14 August, Thursday. day, 22°; night, 21°; rain

15 August, fri

	762 mmHg		86%
	7.2 m/s		+21

15 August, Friday. day, 22°; night, 20°; rain

16 August, sat

	763 mmHg		86%
	7.1 m/s		+21

16 August, Saturday. day, 21°; night, 20°; overcast

17 August, sun

	762 mmHg		86%
	7.2 m/s		+21

17 August, Sunday. day, 22°; night, 20°; partly cloudy

18 August, mon

	761 mmHg		86%
	7.4 m/s		+21

18 August, Monday. day, 22°; night, 20°; partly cloudy

19 August, tue

	762 mmHg		84%
	7.8 m/s		+22

19 August, Tuesday. day, 21°; night, 20°; clear

20 August, wed

	763 mmHg		83%
	7.1 m/s		+22

20 August, Wednesday. day, 21°; night, 20°; clear

21 August, thu

	763 mmHg		84%
	7.5 m/s		+22

21 August, Thursday. day, 21°; night, 20°; partly cloudy

22 August, fri

	762 mmHg		86%
	8.2 m/s		+22

22 August, Friday. day, 21°; night, 20°; rain

23 August, sat

	762 mmHg		83%
	7.9 m/s		+22

23 August, Saturday. day, 21°; night, 20°; clear

24 August, sun

	763 mmHg		82%
	7.6 m/s		+21

24 August, Sunday. day, 21°; night, 20°; clear

25 August, mon

	763 mmHg		84%
	7.3 m/s		+21

25 August, Monday. day, 21°; night, 20°; clear

26 August, tue

	763 mmHg		83%
	7.4 m/s		+21

26 August, Tuesday. day, 21°; night, 20°; clear

27 August, wed

	763 mmHg		84%
	7.1 m/s		+21

27 August, Wednesday. day, 21°; night, 20°; clear

28 August, thu

	763 mmHg		85%
	7.7 m/s		+21

28 August, Thursday. day, 21°; night, 19°; partly cloudy

29 August, fri

	762 mmHg		84%
	8.3 m/s		+21

29 August, Friday. day, 21°; night, 19°; clear

30 August, sat

	762 mmHg		84%
	7.7 m/s		+21

30 August, Saturday. day, 21°; night, 19°; rain

31 August, sun

	763 mmHg		83%
	7.9 m/s		+21

31 August, Sunday. day, 21°; night, 20°; partly cloudy

1 September, mon

	763 mmHg		80%
	8.1 m/s		+21

1 September, Monday. day, 21°; night, 20°; partly cloudy

2 September, tue

	763 mmHg		80%
	8.1 m/s		+21

2 September, Tuesday. day, 20°; night, 19°; rain

3 September, wed

	763 mmHg		82%
	7.9 m/s		+21

3 September, Wednesday. day, 20°; night, 19°; partly cloudy

4 September, thu

	762 mmHg		84%
	7.5 m/s		+20

4 September, Thursday. day, 20°; night, 19°; clear

5 September, fri

	764 mmHg		81%
	7.9 m/s		+20

5 September, Friday. day, 20°; night, 19°; clear

6 September, sat

	764 mmHg		81%
	8.3 m/s		+20

6 September, Saturday. day, 20°; night, 19°; rain

Average data for 10 years

Nantucket August

12

sunny days

9

days with precipitation

6

cloudy days

12 sunny days; 9 days with precipitation; 6 cloudy days;

85

%

air humidity

5.3

m/s

WindS

84

mm of precipitation

(7% of annual average)

+21

°C

Water temperature

air humidity 85%; 84 millimeters of precipitation (7% of annual average); Wind southerly 5.3 Meters per second; Water temperature +21°

Weather graphs for August

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

S

S

S

S

S

S

S

S

S

SW

S

S

S

S

S

S

S

S

S

S

S

S

SW

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

New York
Boston
Islandia
Jamaica
Brookhaven
Portland
Berlin
Albany
Bangor

Cities with similar weather in August

Lisbon
Porto
Genoa
Santa Cruz de Tenerife
Funchal
Seattle
Las Palmas de Gran Canaria
Playa de las Americas
Montreal

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

August in Nantucket is the warmest month of the year. In August, the weather in Nantucket is typically warm. Average daily high temperature in August is about 22 degrees above zero. On average, Nantucket has 12 sunny, 9 rainy, 7 partly cloudy, and 3 cloudy days in August. The rains are usually heavy.

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