World Resorts USA Nantucket Weather

Nantucket 7 Days Forecast

17.03
tue
Day
37°F
E 32 mph
Precip.
0%
Night
34°F
SE 24 mph
Precip.
0%
18.03
wed
Day
30°F
SE 14 mph
Precip.
0%
Night
34°F
N 5 mph
Precip.
0%
19.03
thu
Day
37°F
NW 9 mph
Precip.
0%
Night
37°F
N 7 mph
Precip.
0%
20.03
fri
Day
41°F
NE 15 mph
Precip.
0%
Night
41°F
NE 16 mph
Precip.
0%
21.03
sat
Day
43°F
SW 7 mph
Precip.
0%
Night
37°F
N 17 mph
Precip.
100%
22.03
sun
Day
45°F
NE 20 mph
Precip.
100%
Night
43°F
E 16 mph
Precip.
100%
23.03
mon
Day
37°F
E 30 mph
Precip.
0%
Night
32°F
SE 29 mph
Precip.
0%

Sea water temperature in March, °F

Show year:
2026
2025
2024

The average sea water temperature in March of 2026 was 38.5°F. The highest and lowest sea temperatures during the month were 41.4°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
June 13 days
September 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:
February 36.1 °F
January 36.4 °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

Current weather
03:40
Nantucket
+55°F
N 40 mph
Feels like: +48°F
Precip.: 100%
Places in USA:
Name
°F
Washington
+34°F
Hawaii
+75°F
Honolulu
+75°F
Las Vegas
+68°F
Los Angeles
+64°F
Miami
+70°F
Miami Beach
+72°F
Maui
+70°F
New York
+41°F
San Diego
+61°F
San Francisco
+64°F
Sarasota
+55°F
Tampa
+48°F
Houston
+37°F
Chicago
+19°F
all places
24 Hours Forecast
Nantucket
Local time: 03:40
March 17, tuesday
0600
45°F
NE
30 mph
0900
41°F
NE
29 mph
1200
37°F
E
32 mph
1500
37°F
E
30 mph
1800
37°F
E
30 mph
2100
37°F
E
30 mph
March 18, wednesday
0000
34°F
SE
24 mph
0300
34°F
E
24 mph
Units of measurement: °C / °F