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Nantucket Weather

Nantucket 14 Days Forecast

26.06
fri

Day

68°F

N 12 mph

Precip.
23%

Night

70°F

NE 19 mph

Precip.
26%

27.06
sat

Day

68°F

NE 14 mph

Precip.
15%

Night

66°F

NE 7 mph

Precip.
18%

28.06
sun

Day

68°F

W 4 mph

Precip.
15%

Night

64°F

N 5 mph

Precip.
19%

29.06
mon

Day

64°F

N 7 mph

Precip.
17%

Night

68°F

NE 8 mph

Precip.
11%

30.06
tue

Day

68°F

NE 14 mph

Precip.
11%

Night

68°F

NE 20 mph

Precip.
34%

01.07
wed

Day

68°F

E 16 mph

Precip.
48%

Night

66°F

S 17 mph

Precip.
24%

02.07
thu

Day

66°F

S 16 mph

Precip.
18%

Night

66°F

NW 9 mph

Precip.
19%

03.07
fri

Day

70°F

NE 16 mph

Precip.
19%

Night

68°F

S 23 mph

Precip.
33%

04.07
sat

Day

64°F

S 27 mph

Precip.
30%

Night

64°F

SW 16 mph

Precip.
15%

05.07
sun

Day

66°F

W 5 mph

Precip.
10%

Night

66°F

N 10 mph

Precip.
30%

06.07
mon

Day

64°F

NW 14 mph

Precip.
21%

Night

66°F

W 15 mph

Precip.
14%

07.07
tue

Day

64°F

W 20 mph

Precip.
15%

Night

66°F

W 18 mph

Precip.
10%

08.07
wed

Day

66°F

SW 19 mph

Precip.
17%

Night

66°F

W 19 mph

Precip.
74%

09.07
thu

Day

66°F

SW 21 mph

Precip.
72%

Night

68°F

SW 13 mph

Precip.
14%

sea water
temperature

Nantucket

monthly
weather

Nantucket

current
weather

Nantucket

7 days
forecast

Nantucket

January
February
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May
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September
October
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Show year:

2026

2025

2024

The average sea water temperature in June of 2026 was 61.8°F. The highest and lowest sea temperatures during the month were 67.6°F and 55.6°F.

Show year:

2025

2024

2023

The average sea water temperature in July of 2025 was 68.7°F. The highest and lowest sea temperatures during the month were 72.9°F and 63.9°F.