Current sea water temperature:
+49.8°F
| Minimum sea water temperature in December: | 54.1°F |
| Maximum sea water temperature in December: | 43.7°F |
| Average sea water temperature in December: | 49.2°F |
| more information | |
14 days
forecast
forecast
| Charlestown |
monthly
weather
weather
| Charlestown |
Sea water temperature for the last 10 days:
| December 4 | 49.8°F | November 29 | 51.3°F |
| December 3 | 50.5°F | November 28 | 51.6°F |
| December 2 | 50.7°F | November 27 | 51.4°F |
| December 1 | 51.1°F | November 26 | 51.4°F |
| November 30 | 51.1°F | November 25 | 51.4°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
December
December
| Charlestown |
Best time for vacation in Charlestown
Charlestown on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Charlestown
Local time: 23:46
December 05, friday
0000
25°F
SE
21 mph
21 mph
0300
21°F
S
12 mph
12 mph
0600
19°F
S
9 mph
9 mph
0900
23°F
S
4 mph
4 mph
1200
28°F
N
5 mph
5 mph
1500
30°F
NE
9 mph
9 mph
1800
32°F
NE
6 mph
6 mph
2100
36°F
NE
5 mph
5 mph
