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Nantucket Weather

Nantucket 14 Days Forecast

24.12
wed

Day

39°F

SE 34 mph

Precip.
0%

Night

36°F

S 11 mph

Precip.
0%

25.12
thu

Day

37°F

NE 25 mph

Precip.
0%

Night

32°F

SE 33 mph

Precip.
0%

26.12
fri

Day

25°F

S 21 mph

Precip.
0%

Night

30°F

SW 7 mph

Precip.
100%

27.12
sat

Day

34°F

SW 17 mph

Precip.
87%

Night

32°F

S 11 mph

Precip.
0%

28.12
sun

Day

36°F

N 17 mph

Precip.
100%

Night

41°F

E 21 mph

Precip.
75%

29.12
mon

Day

28°F

E 33 mph

Precip.
0%

Night

27°F

E 35 mph

Precip.
0%

30.12
tue

Day

28°F

E 26 mph

Precip.
0%

Night

28°F

SE 23 mph

Precip.
0%

31.12
wed

Day

27°F

E 17 mph

Precip.
0%

Night

34°F

E 12 mph

Precip.
100%

01.01
thu

Day

39°F

NE 23 mph

Precip.
100%

Night

27°F

E 41 mph

Precip.
71%

02.01
fri

Day

18°F

E 39 mph

Precip.
100%

Night

25°F

E 37 mph

Precip.
0%

03.01
sat

Day

23°F

E 31 mph

Precip.
28%

Night

27°F

E 27 mph

Precip.
0%

04.01
sun

Day

36°F

E 29 mph

Precip.
0%

Night

27°F

SE 25 mph

Precip.
0%

05.01
mon

Day

25°F

S 12 mph

Precip.
0%

Night

30°F

W 6 mph

Precip.
25%

06.01
tue

Day

36°F

W 15 mph

Precip.
0%

Night

39°F

W 22 mph

Precip.
0%

sea water
temperature

Nantucket

monthly
weather

Nantucket

current
weather

Nantucket

7 days
forecast

Nantucket

January
February
March
April

May
June
July
August

September
October
November
December

Show year:

2025

2024

2023

The average sea water temperature in December of 2025 was 43.5°F. The highest and lowest sea temperatures during the month were 48.2°F and 40.3°F.

Show year:

2025

2024

2023

The average sea water temperature in January of 2025 was 36.9°F. The highest and lowest sea temperatures during the month were 41.9°F and 33.8°F.