Current sea water temperature:
+41.4°F
| Minimum sea water temperature in April: | 50.7°F |
| Maximum sea water temperature in April: | 40.6°F |
| Average sea water temperature in April: | 45.8°F |
| more information | |
14 days
forecast
forecast
| Nantucket |
monthly
weather
weather
| Nantucket |
Sea water temperature for the last 10 days:
| April 6 | 41.4°F | April 1 | 40.6°F |
| April 5 | 41.2°F | March 31 | 43.7°F |
| April 4 | 41.5°F | March 30 | 41.9°F |
| April 3 | 41.4°F | March 29 | 41.7°F |
| April 2 | 41.2°F | March 28 | 41.0°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
April
April
| Nantucket |
Best time for vacation in Nantucket
Nantucket on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Nantucket
Local time: 10:30
April 06, monday
1200
45°F
E
26 mph
26 mph
1500
45°F
E
29 mph
29 mph
1800
46°F
E
22 mph
22 mph
2100
45°F
E
17 mph
17 mph
April 07, tuesday
0000
43°F
SE
16 mph
16 mph
0300
43°F
SE
15 mph
15 mph
0600
43°F
SE
11 mph
11 mph
0900
41°F
E
6 mph
6 mph
