Measurements:
°C
°F
CURRENT WEATHER
14:28
Charlestown
80°F
E 14 mph
Feels like: 84°F
Precip: 8%
World Resorts USA Charlestown Weather

7 Day Weather Forecast

07.15
wed
DAY
78°F
E 15 mph
precip
9%
NIGHT
72°F
S 7 mph
precip
8%
07.16
thu
DAY
78°F
E 15 mph
precip
4%
NIGHT
74°F
S 7 mph
precip
4%
07.17
fri
DAY
80°F
E 6 mph
precip
2%
NIGHT
72°F
NE 9 mph
precip
8%
07.18
sat
DAY
74°F
NE 14 mph
precip
23%
NIGHT
74°F
NE 20 mph
precip
35%
07.19
sun
DAY
80°F
E 23 mph
precip
6%
NIGHT
68°F
SE 12 mph
precip
4%
07.20
mon
DAY
74°F
NE 9 mph
precip
3%
NIGHT
72°F
N 11 mph
precip
10%
07.21
tue
DAY
76°F
NE 17 mph
precip
55%
NIGHT
68°F
SE 17 mph
precip
6%

Charlestown Sea Water Temperature in July, °F

Select Year: 2026 2025 2024

The average sea surface temperature in July 2026 for Charlestown was 20.3°F. The maximum and minimum values were 19.1°F and 21.1°F respectively.

Charlestown on the Weather Map

Best Time to Visit Charlestown
The most sunny months:
November 17 days
October 14 days
September 14 days
The most warm months:
July 79.6 °F
August 78.4 °F
September 72.1 °F
Warmest sea temperature:
August 73.1 °F
July 71.7 °F
September 70.6 °F
The most cold months:
January 35.0 °F
February 35.5 °F
December 41.0 °F
The most rainy months:
October 4 days
November 3 days
January 2 days
The most windy months:
January 13 mph
December 13 mph
March 12 mph
more details