Current sea water temperature:
+47.7°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 26 | 47.7°F | April 21 | 46.0°F |
| April 25 | 47.8°F | April 20 | 44.6°F |
| April 24 | 47.5°F | April 19 | 47.3°F |
| April 23 | 47.8°F | April 18 | 46.0°F |
| April 22 | 48.6°F | April 17 | 45.3°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: 13:55
April 26, sunday
1500
46°F
W
17 mph
17 mph
1800
48°F
SW
17 mph
17 mph
2100
45°F
SW
16 mph
16 mph
April 27, monday
0000
46°F
SW
14 mph
14 mph
0300
48°F
SW
17 mph
17 mph
0600
48°F
SW
19 mph
19 mph
0900
48°F
SW
19 mph
19 mph
1200
48°F
SW
20 mph
20 mph
