Measurements:
°C
°F
CURRENT WEATHER
00:23
Charlestown
70°F
E 7 mph
Feels like: 70°F
Precip: 9%
World Resorts USA Charlestown Weather

7 Day Weather Forecast

06.25
thu
DAY
72°F
NE 9 mph
precip
10%
NIGHT
70°F
N 13 mph
precip
14%
06.26
fri
DAY
72°F
NE 12 mph
precip
12%
NIGHT
72°F
E 11 mph
precip
13%
06.27
sat
DAY
68°F
NW 4 mph
precip
49%
NIGHT
68°F
S 1 mph
precip
18%
06.28
sun
DAY
70°F
N 5 mph
precip
16%
NIGHT
68°F
NE 6 mph
precip
13%
06.29
mon
DAY
74°F
NE 9 mph
precip
32%
NIGHT
70°F
NE 12 mph
precip
45%
06.30
tue
DAY
76°F
NE 4 mph
precip
6%
NIGHT
68°F
SW 8 mph
precip
11%
07.01
wed
DAY
70°F
W 13 mph
precip
8%
NIGHT
66°F
NW 9 mph
precip
18%

Charlestown Sea Water Temperature in June, °F

Select Year: 2026 2025 2024

The average sea surface temperature in June 2026 for Charlestown was 15.1°F. The maximum and minimum values were 12.6°F and 16.8°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