Measurements:
°C
°F
Nantucket
42°F
W 23 mph
Feels like: 32°F
Precip: 0%
World Resorts USA Nantucket Weather

Nantucket Sea Water Temperature

Current Sea Water Temperature:
+43.6°F
Maximum Sea Water Temperature in April: 50.8°F
Minimum Sea Water Temperature in April: 40.6°F
Average water temperature in April: 45.4°F

Sea Water Temperature for the Last 10 Days:

April 12 43.6°F April 07 42.2°F
April 11 42.4°F April 06 44.0°F
April 10 43.0°F April 05 42.6°F
April 09 43.8°F April 04 43.0°F
April 08 42.2°F April 03 43.0°F

When is the Warmest Sea for Nantucket?

According to our data for the last three years for Nantucket the highest average sea water temperature was in August, July and September.

Average Water Temperature by Month, °F

Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
0
12
24
36
48
60
72
84
96
44.5
53.6
63.2
70.8
75
72.7
63.4
53.2
45.4
39.5
36.8
39.4

Sea Water Temperature in August

Select Year: 2024 2023 2022
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
65
68
71
74
77
80
83
86

The average sea surface temperature in August 2024 for Nantucket was 72.9°F. The maximum and minimum values were 69.8°F and 75.4°F respectively.

Sea Water Temperature in July

Select Year: 2024 2023 2022
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
62
65
68
71
74
77
80
83

The average sea surface temperature in July 2024 for Nantucket was 72.9°F. The maximum and minimum values were 66.8°F and 77.4°F respectively.

Sea Water Temperature in September

Select Year: 2024 2023 2022
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
57
61
65
69
73
77
81

The average sea surface temperature in September 2024 for Nantucket was 68.1°F. The maximum and minimum values were 61.8°F and 71.8°F respectively.

Best Time to Visit Nantucket
The most sunny months:
June 14 days
September 13 days
July 12 days
The most warm months:
August 73.6 °F
July 73.0 °F
September 68.8 °F
Warmest sea temperature:
August 74.9 °F
July 72.7 °F
September 70.8 °F
The most cold months:
February 35.0 °F
January 35.5 °F
March 39.3 °F
The most rainy months:
January 4 days
October 4 days
April 3 days
The most windy months:
March 19 mph
January 19 mph
December 18 mph

Nantucket on the Weather Map

USA Resorts:
NAME
Boston +34
Chicago +42
Hawaii +76
Honolulu +76
Houston +70
Las Vegas +74
Los Angeles +64
Miami +80
New York +36
Orlando +80
San Diego +60
San Francisco +48
Sarasota +78
Tampa +80
Washington +46
24 Hours Weather Forecast
Nantucket
Local time: 10:59
12 apr, saturday
1200 42°F
W
23 mph
1500 44°F
SW
19 mph
1800 44°F
SW
17 mph
2100 44°F
SW
21 mph
13 apr, sunday
0000 42°F
SW
23 mph
0300 40°F
S
24 mph
0600 40°F
S
26 mph
0900 40°F
S
28 mph