21.07
tue
tue
Day
72°F
NW 14 mph
Precip.
13%
13%
Night
72°F
N 23 mph
Precip.
55%
55%
22.07
wed
wed
Day
73°F
NE 13 mph
Precip.
57%
57%
Night
68°F
S 8 mph
Precip.
26%
26%
23.07
thu
thu
Day
72°F
E 12 mph
Precip.
2%
2%
Night
64°F
S 6 mph
Precip.
4%
4%
24.07
fri
fri
Day
70°F
NE 6 mph
Precip.
2%
2%
Night
66°F
NW 7 mph
Precip.
20%
20%
25.07
sat
sat
Day
70°F
W 12 mph
Precip.
4%
4%
Night
68°F
NE 5 mph
Precip.
8%
8%
26.07
sun
sun
Day
72°F
NW 6 mph
Precip.
3%
3%
Night
68°F
NE 7 mph
Precip.
7%
7%
27.07
mon
mon
Day
73°F
NE 17 mph
Precip.
9%
9%
Night
70°F
NE 11 mph
Precip.
88%
88%
sea water
temperature
temperature
| Charlestown |
monthly
weather
weather
| Charlestown |
current
weather
weather
| Charlestown |
14 days
forecast
forecast
| Charlestown |
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 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.
Air temperature in Charlestown, °F
Precipitation total in Charlestown, in.
* Charts above show average data for the last 3 years.
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
