09.15
tue
tue
DAY
66°F
W 9 mph
precip
3%
3%
NIGHT
64°F
NW 7 mph
precip
10%
10%
09.16
wed
wed
DAY
68°F
NE 9 mph
precip
12%
12%
NIGHT
68°F
NE 11 mph
precip
9%
9%
09.17
thu
thu
DAY
74°F
NE 12 mph
precip
8%
8%
NIGHT
72°F
NE 14 mph
precip
21%
21%
09.18
fri
fri
DAY
74°F
W 11 mph
precip
6%
6%
NIGHT
66°F
SW 9 mph
precip
22%
22%
09.19
sat
sat
DAY
66°F
W 11 mph
precip
3%
3%
NIGHT
72°F
N 20 mph
precip
22%
22%
09.20
sun
sun
DAY
74°F
E 14 mph
precip
41%
41%
NIGHT
66°F
SW 10 mph
precip
17%
17%
09.21
mon
mon
DAY
68°F
W 8 mph
precip
22%
22%
NIGHT
62°F
W 15 mph
precip
37%
37%
09.22
tue
tue
DAY
64°F
W 19 mph
precip
29%
29%
NIGHT
66°F
W 21 mph
precip
44%
44%
09.23
wed
wed
DAY
72°F
E 7 mph
precip
43%
43%
NIGHT
66°F
SW 6 mph
precip
31%
31%
09.24
thu
thu
DAY
64°F
SW 9 mph
precip
59%
59%
NIGHT
66°F
NW 5 mph
precip
31%
31%
09.25
fri
fri
DAY
72°F
NE 11 mph
precip
21%
21%
NIGHT
58°F
SE 12 mph
precip
16%
16%
09.26
sat
sat
DAY
66°F
E 7 mph
precip
14%
14%
NIGHT
60°F
NE 7 mph
precip
20%
20%
09.27
sun
sun
DAY
66°F
SW 16 mph
precip
13%
13%
NIGHT
56°F
SW 15 mph
precip
21%
21%
09.28
mon
mon
DAY
60°F
SW 16 mph
precip
15%
15%
NIGHT
54°F
SW 14 mph
precip
19%
19%
Sea water
temperature
temperature
| Charlestown |
Weather in
September
September
| Charlestown |
7 day weather
forecast
forecast
| Charlestown |
10 day weather
forecast
forecast
| Charlestown |
14 day weather
forecast
forecast
| Charlestown |
Monthly weather
averages
averages
| Charlestown |
Current Weather
Conditions
Conditions
| Charlestown |
When is the Best
Time to Visit?
Time to Visit?
| Charlestown |
Charlestown Sea Water Temperature in September, °F
The average sea surface temperature in September 2026 for Charlestown was 71.5°F. The maximum and minimum values were 70.8°F and 72.6°F respectively.
Charlestown on the Weather Map
USA Resorts:
NAME
F°
| Boston |  |
+62 |
| Chicago |  |
+66 |
| Hawaii |  |
+80 |
| Las Vegas | |
+80 |
| Los Angeles | |
+72 |
| Maui |  |
+66 |
| Miami |  |
+88 |
| Myrtle Beach | |
+78 |
| New York | |
+66 |
| Panama City Beach | |
+90 |
| San Diego | |
+70 |
| San Francisco |  |
+60 |
| Santa Monica | |
+70 |
| Sarasota | |
+86 |
| Washington | |
+66 |
Countries:
NAME
POPULARITY
24 Hours Weather Forecast
Charlestown
Local time: 10:33
15 sep, tuesday
| 1200 | |
66°F | W 9 mph |
| 1500 | |
66°F | NW 7 mph |
| 1800 | |
66°F | NW 6 mph |
| 2100 | |
64°F | NW 7 mph |
16 sep, wednesday
| 0000 | |
64°F | NW 7 mph |
| 0300 | |
62°F | NE 2 mph |
| 0600 | |
62°F | N 3 mph |
| 0900 |  |
66°F | NE 6 mph |