World Resorts USA Nantucket Weather

Nantucket 7 Days Forecast

05.08
wed
Day
79°F
NE 10 mph
Precip.
3%
Night
72°F
NE 13 mph
Precip.
17%
06.08
thu
Day
73°F
NE 15 mph
Precip.
17%
Night
73°F
NE 17 mph
Precip.
17%
07.08
fri
Day
73°F
NE 14 mph
Precip.
22%
Night
73°F
NE 15 mph
Precip.
17%
08.08
sat
Day
73°F
NE 16 mph
Precip.
17%
Night
73°F
NE 20 mph
Precip.
25%
09.08
sun
Day
73°F
NE 14 mph
Precip.
15%
Night
75°F
NE 16 mph
Precip.
13%
10.08
mon
Day
73°F
NE 15 mph
Precip.
19%
Night
75°F
NE 17 mph
Precip.
58%
11.08
tue
Day
73°F
NE 17 mph
Precip.
17%
Night
70°F
W 8 mph
Precip.
14%

Sea water temperature in August, °F

Show year:
2025
2024
2023

The average sea water temperature in August of 2025 was 69.7°F. The highest and lowest sea temperatures during the month were 73.2°F and 67.6°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:
June 14 days
September 13 days
October 13 days
Warmest months:
July 71.5 °F
August 70.9 °F
September 67.1 °F
Warmest sea temp:
August 72.0 °F
July 70.0 °F
September 68.5 °F
Coldest months:
February 36.1 °F
January 36.4 °F
March 40.7 °F
Rainiest months:
October 4 days
January 3 days
December 3 days
Windiest months:
January 19.0 mph
March 19.0 mph
December 18.9 mph

Nantucket on a weather map

Current weather
14:57
Nantucket
+81°F
NE 11 mph
Feels like: +82°F
Precip.: 4%
Places in USA:
Name
°F
Boston
+90°F
Washington
+84°F
Hawaii
+79°F
Las Vegas
+117°F
Los Angeles
+88°F
Miami
+88°F
Maui
+75°F
Myrtle Beach
+81°F
New York
+81°F
San Diego
+77°F
San Francisco
+61°F
Santa Monica
+77°F
Sarasota
+88°F
Houston
+100°F
Chicago
+79°F
all places
24 Hours Forecast
Nantucket
Local time: 14:57
August 05, wednesday
1500
81°F
NE
11 mph
1800
79°F
NE
12 mph
2100
72°F
NE
12 mph
August 06, thursday
0000
72°F
NE
13 mph
0300
73°F
NE
13 mph
0600
73°F
NE
12 mph
0900
73°F
NE
13 mph
1200
73°F
NE
15 mph
Units of measurement: °C / °F