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USA

Nantucket Weather

Nantucket 14 Days Forecast

30.12
tue

Day

28°F

E 40 mph

Precip.
0%

Night

30°F

E 34 mph

Precip.
0%

31.12
wed

Day

32°F

E 21 mph

Precip.
0%

Night

34°F

E 25 mph

Precip.
0%

01.01
thu

Day

30°F

SE 24 mph

Precip.
0%

Night

30°F

E 22 mph

Precip.
0%

02.01
fri

Day

28°F

E 19 mph

Precip.
75%

Night

32°F

E 14 mph

Precip.
0%

03.01
sat

Day

30°F

SE 12 mph

Precip.
0%

Night

32°F

SE 9 mph

Precip.
0%

04.01
sun

Day

30°F

S 22 mph

Precip.
0%

Night

30°F

SW 14 mph

Precip.
0%

05.01
mon

Day

30°F

NW 5 mph

Precip.
0%

Night

37°F

N 17 mph

Precip.
0%

06.01
tue

Day

45°F

NW 32 mph

Precip.
100%

Night

41°F

E 19 mph

Precip.
74%

07.01
wed

Day

30°F

E 34 mph

Precip.
0%

Night

32°F

E 30 mph

Precip.
0%

08.01
thu

Day

34°F

SE 10 mph

Precip.
0%

Night

34°F

SE 22 mph

Precip.
0%

09.01
fri

Day

32°F

SE 13 mph

Precip.
0%

Night

36°F

E 7 mph

Precip.
0%

10.01
sat

Day

39°F

N 7 mph

Precip.
100%

Night

41°F

N 17 mph

Precip.
100%

11.01
sun

Day

37°F

SE 16 mph

Precip.
0%

Night

36°F

SE 14 mph

Precip.
43%

12.01
mon

Day

32°F

S 16 mph

Precip.
0%

Night

34°F

SW 10 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 42.7°F. The highest and lowest sea temperatures during the month were 48.2°F and 39.2°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.