Current sea water temperature:
+67.5°F
| Minimum sea water temperature in July: | 73.9°F |
| Maximum sea water temperature in July: | 63.9°F |
| Average sea water temperature in July: | 69.4°F |
| more information | |
14 days
forecast
forecast
| Charlestown |
monthly
weather
weather
| Charlestown |
Sea water temperature for the last 10 days:
| July 21 | 67.5°F | July 16 | 70.3°F |
| July 20 | 67.1°F | July 15 | 70.0°F |
| July 19 | 67.8°F | July 14 | 69.6°F |
| July 18 | 67.5°F | July 13 | 69.6°F |
| July 17 | 67.5°F | July 12 | 69.1°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 68.3°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
July
July
| Charlestown |
Best time for vacation in Charlestown
Charlestown on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Charlestown
Local time: 09:25
July 21, tuesday
1200
72°F
NW
14 mph
14 mph
1500
70°F
NW
15 mph
15 mph
1800
70°F
NW
15 mph
15 mph
2100
70°F
N
16 mph
16 mph
July 22, wednesday
0000
72°F
N
23 mph
23 mph
0300
72°F
NE
19 mph
19 mph
0600
70°F
NE
11 mph
11 mph
0900
72°F
NE
12 mph
12 mph
