World Resorts

USA

Charlestown Weather

Charlestown 14 Days Forecast

19.09
sat

Day

63°F

SW 9 mph

Precip.
8%

Night

59°F

NW 11 mph

Precip.
16%

20.09
sun

Day

63°F

NW 9 mph

Precip.
17%

Night

64°F

NW 13 mph

Precip.
83%

21.09
mon

Day

59°F

SW 22 mph

Precip.
37%

Night

61°F

SW 19 mph

Precip.
20%

22.09
tue

Day

57°F

SW 25 mph

Precip.
26%

Night

55°F

W 22 mph

Precip.
71%

23.09
wed

Day

63°F

W 29 mph

Precip.
22%

Night

61°F

SW 25 mph

Precip.
20%

24.09
thu

Day

59°F

SW 27 mph

Precip.
73%

Night

57°F

SW 24 mph

Precip.
41%

25.09
fri

Day

59°F

SW 17 mph

Precip.
13%

Night

59°F

SW 9 mph

Precip.
14%

26.09
sat

Day

64°F

SW 16 mph

Precip.
3%

Night

57°F

SW 15 mph

Precip.
11%

27.09
sun

Day

64°F

W 19 mph

Precip.
14%

Night

57°F

SW 17 mph

Precip.
24%

28.09
mon

Day

64°F

SW 20 mph

Precip.
15%

Night

59°F

SW 16 mph

Precip.
25%

29.09
tue

Day

61°F

S 15 mph

Precip.
13%

Night

59°F

SW 13 mph

Precip.
9%

30.09
wed

Day

66°F

SW 14 mph

Precip.
8%

Night

59°F

SW 16 mph

Precip.
24%

01.10
thu

Day

59°F

SW 22 mph

Precip.
22%

Night

59°F

SW 18 mph

Precip.
24%

02.10
fri

Day

63°F

SW 16 mph

Precip.
15%

Night

57°F

SW 12 mph

Precip.
22%

sea water
temperature

Charlestown

monthly
weather

Charlestown

current
weather

Charlestown

7 days
forecast

Charlestown

January
February
March
April

May
June
July
August

September
October
November
December

Show year:

2026

2025

2024

The average sea water temperature in September of 2026 was 69.2°F. The highest and lowest sea temperatures during the month were 70.3°F and 68.4°F.

Show year:

2025

2024

2023

The average sea water temperature in October of 2025 was 64.4°F. The highest and lowest sea temperatures during the month were 68.4°F and 59.9°F.