Measurements:
°C
°F
CURRENT WEATHER
17:03
Charlestown
42°F
NE 14 mph
Feels like: 32°F
Precip: 0%
World Resorts USA Charlestown Weather

7 Day Weather Forecast

03.13
fri
DAY
38°F
NE 12 mph
precip
0%
NIGHT
38°F
N 31 mph
precip
100%
03.14
sat
DAY
40°F
E 31 mph
precip
0%
NIGHT
34°F
SE 19 mph
precip
0%
03.15
sun
DAY
34°F
NW 9 mph
precip
0%
NIGHT
38°F
NW 17 mph
precip
0%
03.16
mon
DAY
44°F
N 25 mph
precip
100%
NIGHT
50°F
N 30 mph
precip
100%
03.17
tue
DAY
34°F
E 24 mph
precip
0%
NIGHT
28°F
E 21 mph
precip
0%
03.18
wed
DAY
28°F
E 15 mph
precip
0%
NIGHT
32°F
NE 11 mph
precip
0%
03.19
thu
DAY
36°F
N 14 mph
precip
0%
NIGHT
38°F
NE 14 mph
precip
0%

Charlestown Sea Water Temperature in March, °F

Select Year: 2025 2024 2023

The average sea surface temperature in March 2025 for Charlestown was 4.8°F. The maximum and minimum values were 3.7°F and 6.6°F respectively.

Charlestown on the Weather Map

Best Time to Visit Charlestown
The most sunny months:
November 17 days
September 14 days
October 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
May 3 days
The most windy months:
January 13 mph
December 13 mph
March 12 mph
more details