Current sea water temperature:
+37.9°F
| Minimum sea water temperature in March: | 44.2°F |
| Maximum sea water temperature in March: | 35.2°F |
| Average sea water temperature in March: | 41.0°F |
| more information | |
14 days
forecast
forecast
| Charlestown |
monthly
weather
weather
| Charlestown |
Sea water temperature for the last 10 days:
| March 18 | 37.9°F | March 13 | 38.1°F |
| March 17 | 36.9°F | March 12 | 38.7°F |
| March 16 | 37.0°F | March 11 | 38.1°F |
| March 15 | 37.0°F | March 10 | 36.3°F |
| March 14 | 37.4°F | March 9 | 37.4°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
March
March
| Charlestown |
Best time for vacation in Charlestown
Charlestown on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Charlestown
Local time: 17:38
March 18, wednesday
1800
37°F
N
10 mph
10 mph
2100
34°F
N
7 mph
7 mph
March 19, thursday
0000
32°F
N
6 mph
6 mph
0300
32°F
N
6 mph
6 mph
0600
34°F
NW
3 mph
3 mph
0900
34°F
NW
5 mph
5 mph
1200
36°F
N
7 mph
7 mph
1500
37°F
N
9 mph
9 mph
