25.08
tue
tue
Day
84°F
N 6 mph
Precip.
21%
21%
Night
79°F
W 4 mph
Precip.
22%
22%
26.08
wed
wed
Day
91°F
N 6 mph
Precip.
19%
19%
Night
79°F
NE 6 mph
Precip.
20%
20%
27.08
thu
thu
Day
91°F
NE 8 mph
Precip.
2%
2%
Night
79°F
N 6 mph
Precip.
12%
12%
28.08
fri
fri
Day
91°F
NE 8 mph
Precip.
6%
6%
Night
77°F
S 2 mph
Precip.
34%
34%
29.08
sat
sat
Day
90°F
NW 7 mph
Precip.
7%
7%
Night
79°F
NW 4 mph
Precip.
25%
25%
30.08
sun
sun
Day
90°F
NW 7 mph
Precip.
12%
12%
Night
82°F
N 8 mph
Precip.
15%
15%
31.08
mon
mon
Day
91°F
N 7 mph
Precip.
10%
10%
Night
81°F
NE 9 mph
Precip.
10%
10%
sea water
temperature
temperature
| Charleston |
monthly
weather
weather
| Charleston |
current
weather
weather
| Charleston |
14 days
forecast
forecast
| Charleston |
Sea water temperature in August, °F
Show year:
2026
2025
2024
The average sea water temperature in August of 2026 was 85.6°F. The highest and lowest sea temperatures during the month were 87.6°F and 84.4°F.
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: 16:55
August 25, tuesday
1800
84°F
W
9 mph
9 mph
2100
79°F
W
5 mph
5 mph
August 26, wednesday
0000
79°F
W
4 mph
4 mph
0300
75°F
NW
2 mph
2 mph
0600
75°F
N
0 mph
0 mph
0900
81°F
E
4 mph
4 mph
1200
91°F
N
6 mph
6 mph
1500
91°F
N
11 mph
11 mph
