Current sea water temperature:
+70.2°F
| Minimum sea water temperature in April: | 73.8°F |
| Maximum sea water temperature in April: | 57.0°F |
| Average sea water temperature in April: | 66.5°F |
| more information | |
14 days
forecast
forecast
| Charleston |
monthly
weather
weather
| Charleston |
Sea water temperature for the last 10 days:
| April 26 | 70.2°F | April 21 | 69.6°F |
| April 25 | 69.4°F | April 20 | 69.8°F |
| April 24 | 69.3°F | April 19 | 69.3°F |
| April 23 | 68.9°F | April 18 | 69.3°F |
| April 22 | 68.7°F | April 17 | 68.9°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:
2025
2024
2023
The average sea water temperature in August of 2025 was 84.1°F. The highest and lowest sea temperatures during the month were 86.9°F and 82.0°F.
Sea water temperature in July, °F
Show year:
2025
2024
2023
The average sea water temperature in July of 2025 was 84.7°F. The highest and lowest sea temperatures during the month were 86.9°F and 82.6°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
April
April
| Charleston |
Best time for vacation in Charleston
Charleston on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Charleston
Local time: 15:32
April 26, sunday
1800
68°F
SW
14 mph
14 mph
2100
66°F
SW
14 mph
14 mph
April 27, monday
0000
61°F
SW
14 mph
14 mph
0300
57°F
SW
13 mph
13 mph
0600
55°F
SW
12 mph
12 mph
0900
57°F
SW
12 mph
12 mph
1200
64°F
SW
9 mph
9 mph
1500
68°F
W
13 mph
13 mph
