14.09
mon
mon
Day
93°F
SW 4 mph
Precip.
9%
9%
Night
81°F
N 3 mph
Precip.
7%
7%
15.09
tue
tue
Day
82°F
SW 14 mph
Precip.
15%
15%
Night
75°F
W 7 mph
Precip.
13%
13%
16.09
wed
wed
Day
84°F
SW 10 mph
Precip.
4%
4%
Night
75°F
W 7 mph
Precip.
4%
4%
17.09
thu
thu
Day
82°F
SW 11 mph
Precip.
3%
3%
Night
77°F
W 6 mph
Precip.
26%
26%
18.09
fri
fri
Day
86°F
W 8 mph
Precip.
3%
3%
Night
77°F
W 8 mph
Precip.
16%
16%
19.09
sat
sat
Day
82°F
SW 10 mph
Precip.
3%
3%
Night
75°F
SW 6 mph
Precip.
11%
11%
20.09
sun
sun
Day
84°F
W 4 mph
Precip.
3%
3%
Night
75°F
NE 6 mph
Precip.
16%
16%
sea water
temperature
temperature
| Charleston |
monthly
weather
weather
| Charleston |
current
weather
weather
| Charleston |
14 days
forecast
forecast
| Charleston |
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 78.8°F. The highest and lowest sea temperatures during the month were 81.5°F and 75.4°F.
Air temperature in Charleston, °F
Precipitation total in Charleston, in.
* Charts above show average data for the last 3 years.
Best time for vacation in Charleston
Charleston on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Charleston
Local time: 17:07
September 14, monday
1800
90°F
NW
6 mph
6 mph
2100
81°F
NW
5 mph
5 mph
September 15, tuesday
0000
81°F
N
3 mph
3 mph
0300
79°F
SW
6 mph
6 mph
0600
79°F
W
11 mph
11 mph
0900
81°F
W
12 mph
12 mph
1200
82°F
SW
14 mph
14 mph
1500
84°F
W
14 mph
14 mph
