Charleston in September
Find out everything about the water temperature in Charleston in September. Average, minimum and maximum recorded temperatures as well as daily temperature in September for the last two years. Compare the current month's sea temperature data with other months of the year.
Water temperature in September
Minimum:
66.2 °F
Average:
72.4 °F
Maximum:
79.3 °F
Sea water temperature in Charleston in September
In the city of Charleston, the month of September is somewhat comfortable for swimming. The minimum recorded temperature during this month was 66.2°F on September 28, 2020, with an average temperature being 72.4°F and a maximum temperature reaching 79.3°F on September 1, 2022.
| Date | 10 years average | 2024 | 2023 |
|---|---|---|---|
| Sep 1 | 75.4°F | 73.8°F | 74.7°F |
| Sep 2 | 74.4°F | 73.4°F | 73.4°F |
| Sep 3 | 74.0°F | 73.3°F | 72.9°F |
| Sep 4 | 74.0°F | 72.6°F | 74.5°F |
| Sep 5 | 74.4°F | 72.1°F | 75.9°F |
| Sep 6 | 74.4°F | 72.8°F | 74.8°F |
| Sep 7 | 74.3°F | 71.9°F | 76.5°F |
| Sep 8 | 74.3°F | 72.6°F | 77.3°F |
| Sep 9 | 73.7°F | 71.9°F | 75.5°F |
| Sep 10 | 73.7°F | 70.9°F | 75.3°F |
| Sep 11 | 73.3°F | 70.6°F | 75.1°F |
| Sep 12 | 73.1°F | 70.3°F | 77.4°F |
| Sep 13 | 73.1°F | 70.5°F | 77.1°F |
| Sep 14 | 73.3°F | 71.6°F | 77.7°F |
| Sep 15 | 73.0°F | 71.8°F | 75.9°F |
| Sep 16 | 73.1°F | 73.0°F | 73.4°F |
| Sep 17 | 72.4°F | 71.5°F | 73.6°F |
| Sep 18 | 72.1°F | 71.6°F | 71.9°F |
| Sep 19 | 72.2°F | 71.4°F | 72.6°F |
| Sep 20 | 71.9°F | 72.1°F | 71.0°F |
| Sep 21 | 71.6°F | 72.0°F | 70.1°F |
| Sep 22 | 71.2°F | 72.5°F | 69.8°F |
| Sep 23 | 71.0°F | 71.3°F | 69.3°F |
| Sep 24 | 70.7°F | 71.2°F | 68.8°F |
| Sep 25 | 70.1°F | 70.4°F | 68.3°F |
| Sep 26 | 69.7°F | 69.8°F | 67.8°F |
| Sep 27 | 69.4°F | 69.4°F | 66.7°F |
| Sep 28 | 69.0°F | 68.9°F | 66.4°F |
| Sep 29 | 69.1°F | 68.6°F | 66.4°F |
| Sep 30 | 68.8°F | 68.5°F | 66.2°F |
In Charleston, the months July through August offer comfortable swimming conditions, which amounts to 68 swimming days.
The warmest water in Charleston was recorded on July 20, 2020, reaching a 81.8°F. While the coldest temperature occurred on January 19, 2022, dipping to 33.6°F. The average readings by season are 41.8°F in Winter, 49.4°F in Spring, 73.2°F in Summer, and 63.4°F in Autumn.
September's average temperature is a slight drop from August's average of 76.3°F. In October, the temperature is expected to decrease further, potentially averaging around 63.6°F.
Popular neighboring cities and resorts
| City | Water temperature* | Distance** |
|---|---|---|
| Staten Island |
46.8°F
|
5mi |
| Coney Island |
45.5°F
|
13mi |
| Jersey City |
46.6°F
|
16mi |
| Brooklyn |
46.2°F
|
17mi |
| New York City |
46.6°F
|
17mi |
* current water temperature in this city
** straight line distance from Charleston