29.04
wed
wed
Day
52°F
N 11 mph
Precip.
0%
0%
Night
48°F
N 6 mph
Precip.
0%
0%
30.04
thu
thu
Day
48°F
W 7 mph
Precip.
100%
100%
Night
46°F
SE 16 mph
Precip.
0%
0%
01.05
fri
fri
Day
52°F
E 14 mph
Precip.
0%
0%
Night
46°F
SE 12 mph
Precip.
0%
0%
02.05
sat
sat
Day
48°F
NE 11 mph
Precip.
0%
0%
Night
45°F
SE 9 mph
Precip.
0%
0%
03.05
sun
sun
Day
48°F
NE 18 mph
Precip.
0%
0%
Night
45°F
E 9 mph
Precip.
0%
0%
04.05
mon
mon
Day
52°F
NE 16 mph
Precip.
28%
28%
Night
50°F
NE 15 mph
Precip.
0%
0%
05.05
tue
tue
Day
54°F
NE 16 mph
Precip.
0%
0%
Night
54°F
NE 27 mph
Precip.
100%
100%
sea water
temperature
temperature
| Charlestown |
monthly
weather
weather
| Charlestown |
current
weather
weather
| Charlestown |
14 days
forecast
forecast
| Charlestown |
Sea water temperature in April, °F
Show year:
2026
2025
2024
The average sea water temperature in April of 2026 was 42.8°F. The highest and lowest sea temperatures during the month were 46.8°F and 39.0°F.
Sea water temperature in May, °F
Show year:
2025
2024
2023
The average sea water temperature in May of 2025 was 52.6°F. The highest and lowest sea temperatures during the month were 55.6°F and 47.5°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: 08:33
April 29, wednesday
0900
46°F
SW
8 mph
8 mph
1200
52°F
N
11 mph
11 mph
1500
54°F
NE
8 mph
8 mph
1800
50°F
NE
9 mph
9 mph
2100
48°F
N
6 mph
6 mph
April 30, thursday
0000
48°F
N
6 mph
6 mph
0300
48°F
N
5 mph
5 mph
0600
48°F
NW
2 mph
2 mph
