Current sea water temperature:
+70.7°F
| Minimum sea water temperature in August: | 74.8°F |
| Maximum sea water temperature in August: | 67.5°F |
| Average sea water temperature in August: | 70.8°F |
| more information | |
14 days
forecast
forecast
| Charlestown |
monthly
weather
weather
| Charlestown |
Sea water temperature for the last 10 days:
| August 14 | 70.7°F | August 9 | 72.7°F |
| August 13 | 71.2°F | August 8 | 72.5°F |
| August 12 | 71.6°F | August 7 | 71.2°F |
| August 11 | 71.8°F | August 6 | 70.0°F |
| August 10 | 72.1°F | August 5 | 70.5°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:
2026
2025
2024
The average sea water temperature in July of 2026 was 68.5°F. The highest and lowest sea temperatures during the month were 70.3°F and 66.4°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
August
August
| Charlestown |
Best time for vacation in Charlestown
Charlestown on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Charlestown
Local time: 17:03
August 14, friday
1800
79°F
E
7 mph
7 mph
2100
73°F
S
6 mph
6 mph
August 15, saturday
0000
66°F
SW
11 mph
11 mph
0300
66°F
S
9 mph
9 mph
0600
63°F
S
11 mph
11 mph
0900
68°F
S
14 mph
14 mph
1200
73°F
S
7 mph
7 mph
1500
75°F
N
7 mph
7 mph
