Current sea water temperature:
+35.4°F
| Minimum sea water temperature in February: | 42.3°F |
| Maximum sea water temperature in February: | 31.8°F |
| Average sea water temperature in February: | 37.5°F |
| more information | |
14 days
forecast
forecast
| Nantucket |
monthly
weather
weather
| Nantucket |
Sea water temperature for the last 10 days:
| February 24 | 35.4°F | February 19 | 33.4°F |
| February 23 | 34.2°F | February 18 | 33.1°F |
| February 22 | 34.0°F | February 17 | 33.4°F |
| February 21 | 33.4°F | February 16 | 32.5°F |
| February 20 | 33.1°F | February 15 | 33.1°F |
Monthly sea water temperature, °F
When is the warmest sea in Nantucket?
Based on the data about daily sea water temperature for the last three years the warmest sea in Nantucket was noticed in August, July and September.
Monthly Sea Temperatures in Nantucket, °F
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.
Sea water temperature in July, °F
Show year:
2025
2024
2023
The average sea water temperature in July of 2025 was 68.7°F. The highest and lowest sea temperatures during the month were 72.9°F and 63.9°F.
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 67.7°F. The highest and lowest sea temperatures during the month were 69.4°F and 66.4°F.
current
weather
weather
| Nantucket |
weather in
March
March
| Nantucket |
Best time for vacation in Nantucket
Nantucket on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Nantucket
Local time: 20:29
February 24, tuesday
2100
28°F
E
23 mph
23 mph
February 25, wednesday
0000
28°F
E
19 mph
19 mph
0300
28°F
E
19 mph
19 mph
0600
32°F
NE
20 mph
20 mph
0900
36°F
N
23 mph
23 mph
1200
36°F
NE
25 mph
25 mph
1500
37°F
NE
24 mph
24 mph
1800
37°F
NE
24 mph
24 mph
