Current sea water temperature:
+40.6°F
| Minimum sea water temperature in April: | 49.8°F |
| Maximum sea water temperature in April: | 39.0°F |
| Average sea water temperature in April: | 44.9°F |
| more information | |
14 days
forecast
forecast
| Charlestown |
monthly
weather
weather
| Charlestown |
Sea water temperature for the last 10 days:
| April 9 | 40.6°F | April 4 | 39.0°F |
| April 8 | 40.6°F | April 3 | 40.8°F |
| April 7 | 40.8°F | April 2 | 41.2°F |
| April 6 | 39.4°F | April 1 | 39.4°F |
| April 5 | 40.3°F | March 31 | 39.0°F |
Monthly sea water temperature, °F
When is the warmest sea in Charlestown?
Based on the data about daily sea water temperature for the last three years the warmest sea in Charlestown was noticed in August, July and September.
Monthly Sea Temperatures in Charlestown, °F
Sea water temperature in August, °F
Show year:
2025
2024
2023
The average sea water temperature in August of 2025 was 69.6°F. The highest and lowest sea temperatures during the month were 72.0°F and 67.8°F.
Sea water temperature in July, °F
Show year:
2025
2024
2023
The average sea water temperature in July of 2025 was 69.1°F. The highest and lowest sea temperatures during the month were 71.8°F and 65.7°F.
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 68.1°F. The highest and lowest sea temperatures during the month were 69.6°F and 66.7°F.
current
weather
weather
| Charlestown |
weather in
April
April
| Charlestown |
Best time for vacation in Charlestown
Charlestown on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Charlestown
Local time: 05:38
April 09, thursday
0600
39°F
W
4 mph
4 mph
0900
39°F
NW
6 mph
6 mph
1200
39°F
NW
7 mph
7 mph
1500
39°F
N
9 mph
9 mph
1800
43°F
N
9 mph
9 mph
2100
41°F
N
9 mph
9 mph
April 10, friday
0000
39°F
N
9 mph
9 mph
0300
37°F
NE
9 mph
9 mph
