Current sea water temperature:
+83.1°F
| Minimum sea water temperature in September: | 86.7°F |
| Maximum sea water temperature in September: | 75.4°F |
| Average sea water temperature in September: | 81.1°F |
| more information | |
14 days
forecast
forecast
| Charleston |
monthly
weather
weather
| Charleston |
Sea water temperature for the last 10 days:
| September 14 | 83.1°F | September 9 | 83.8°F |
| September 13 | 83.1°F | September 8 | 85.5°F |
| September 12 | 82.2°F | September 7 | 85.1°F |
| September 11 | 83.3°F | September 6 | 84.2°F |
| September 10 | 83.5°F | September 5 | 84.2°F |
Monthly sea water temperature, °F
When is the warmest sea in Charleston?
Based on the data about daily sea water temperature for the last three years the warmest sea in Charleston was noticed in August, July and September.
Monthly Sea Temperatures in Charleston, °F
Sea water temperature in August, °F
Show year:
2026
2025
2024
The average sea water temperature in August of 2026 was 85.4°F. The highest and lowest sea temperatures during the month were 87.6°F and 83.7°F.
Sea water temperature in July, °F
Show year:
2026
2025
2024
The average sea water temperature in July of 2026 was 85.8°F. The highest and lowest sea temperatures during the month were 87.1°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.
current
weather
weather
| Charleston |
weather in
September
September
| Charleston |
Best time for vacation in Charleston
Charleston on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Charleston
Local time: 16:41
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
