Current sea water temperature:
+56.3°F
| Minimum sea water temperature in October: | 68.5°F |
| Maximum sea water temperature in October: | 55.9°F |
| Average sea water temperature in October: | 61.6°F |
| more information | |
14 days
forecast
forecast
| Nantucket |
monthly
weather
weather
| Nantucket |
Sea water temperature for the last 10 days:
| October 24 | 56.3°F | October 19 | 59.5°F |
| October 23 | 58.5°F | October 18 | 60.6°F |
| October 22 | 58.5°F | October 17 | 61.9°F |
| October 21 | 58.8°F | October 16 | 61.3°F |
| October 20 | 58.6°F | October 15 | 61.9°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:
2026
2025
2024
The average sea water temperature in August of 2026 was 71.5°F. The highest and lowest sea temperatures during the month were 73.8°F and 67.6°F.
Sea water temperature in July, °F
Show year:
2026
2025
2024
The average sea water temperature in July of 2026 was 69.5°F. The highest and lowest sea temperatures during the month were 71.8°F and 66.7°F.
Sea water temperature in September, °F
Show year:
2026
2025
2024
The average sea water temperature in September of 2026 was 67.8°F. The highest and lowest sea temperatures during the month were 72.3°F and 59.0°F.
current
weather
weather
| Nantucket |
weather in
October
October
| Nantucket |
Best time for vacation in Nantucket
Nantucket on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Nantucket
Local time: 23:50
October 25, sunday
0000
54°F
NE
4 mph
4 mph
0300
54°F
N
1 mph
1 mph
0600
54°F
NE
3 mph
3 mph
0900
54°F
N
4 mph
4 mph
1200
54°F
N
4 mph
4 mph
1500
54°F
N
7 mph
7 mph
1800
54°F
N
9 mph
9 mph
2100
55°F
N
11 mph
11 mph
