World Resorts USA Nantucket Weather

Nantucket 7 Days Forecast

25.02
wed
Day
36°F
NE 25 mph
Precip.
100%
Night
37°F
E 24 mph
Precip.
0%
26.02
thu
Day
36°F
E 19 mph
Precip.
0%
Night
37°F
W 19 mph
Precip.
100%
27.02
fri
Day
36°F
S 23 mph
Precip.
0%
Night
34°F
NE 9 mph
Precip.
0%
28.02
sat
Day
37°F
N 13 mph
Precip.
0%
Night
37°F
NE 8 mph
Precip.
0%
01.03
sun
Day
34°F
E 12 mph
Precip.
0%
Night
30°F
S 27 mph
Precip.
0%
02.03
mon
Day
23°F
S 22 mph
Precip.
0%
Night
23°F
S 16 mph
Precip.
0%
03.03
tue
Day
27°F
W 12 mph
Precip.
0%
Night
39°F
N 30 mph
Precip.
100%

Sea water temperature in February, °F

Show year:
2026
2025
2024

The average sea water temperature in February of 2026 was 33.4°F. The highest and lowest sea temperatures during the month were 35.4°F and 31.8°F.

Sea water temperature in March, °F

Show year:
2025
2024
2023

The average sea water temperature in March of 2025 was 39.7°F. The highest and lowest sea temperatures during the month were 43.3°F and 36.1°F.

Air temperature in Nantucket, °F

Precipitation total in Nantucket, in.

* Charts above show average data for the last 3 years.

Best time for vacation in Nantucket

Sunniest months:
October 13 days
September 13 days
June 13 days
Warmest months:
August 70.9 °F
July 70.6 °F
September 67.1 °F
Warmest sea temp:
August 72.0 °F
July 70.1 °F
September 68.5 °F
Coldest months:
January 36.4 °F
February 36.5 °F
March 40.4 °F
Rainiest months:
October 4 days
January 3 days
December 3 days
Windiest months:
March 19.1 mph
January 19.0 mph
December 18.9 mph

Nantucket on a weather map

Nantucket
+28°F
E 19 mph
Feels like: +16°F
Precip.: 0%
Places in USA:
Name
°F
+34°F
+68°F
+68°F
+64°F
+63°F
+63°F
+63°F
+63°F
+25°F
+61°F
+55°F
+52°F
+48°F
+59°F
+32°F
24 Hours Forecast
Nantucket
Local time: 01:11
February 25, wednesday
0300
28°F
E
19 mph
0600
32°F
NE
20 mph
0900
36°F
N
23 mph
1200
36°F
NE
25 mph
1500
37°F
NE
24 mph
1800
37°F
NE
24 mph
2100
37°F
NE
23 mph
February 26, thursday
0000
37°F
E
24 mph
Units of measurement: °C / °F