Charleston in March
Find out everything about the water temperature in Charleston in March. Average, minimum and maximum recorded temperatures as well as daily temperature in March for the last two years. Compare the current month's sea temperature data with other months of the year.
Water temperature in March
Minimum:
35.4 °F
Average:
42.4 °F
Maximum:
48.3 °F
Sea water temperature in Charleston in March
In the city of Charleston, the month of March is too cold for swimming. The minimum recorded temperature during this month was 35.4°F on March 1, 2026, with an average temperature being 42.4°F and a maximum temperature reaching 48.3°F on March 22, 2020.
| Date | 10 years average | 2026 | 2025 |
|---|---|---|---|
| Mar 1 | 40.0°F | 35.4°F | 39.1°F |
| Mar 2 | 39.7°F | 37.1°F | 38.0°F |
| Mar 3 | 40.3°F | 36.3°F | 38.9°F |
| Mar 4 | 40.3°F | 35.8°F | 38.2°F |
| Mar 5 | 40.2°F | 36.1°F | 39.5°F |
| Mar 6 | 40.2°F | 36.2°F | 39.5°F |
| Mar 7 | 40.2°F | 35.5°F | 40.7°F |
| Mar 8 | 40.5°F | 37.2°F | 41.3°F |
| Mar 9 | 41.0°F | 36.6°F | 41.6°F |
| Mar 10 | 41.6°F | 40.2°F | 40.9°F |
| Mar 11 | 42.0°F | 43.1°F | 41.9°F |
| Mar 12 | 42.4°F | 42.2°F | 44.0°F |
| Mar 13 | 42.6°F | 42.4°F | 43.5°F |
| Mar 14 | 42.3°F | 42.0°F | 42.7°F |
| Mar 15 | 42.2°F | 42.0°F | 42.4°F |
| Mar 16 | 42.3°F | 42.1°F | 42.7°F |
| Mar 17 | 43.0°F | 42.8°F | 44.7°F |
| Mar 18 | 42.9°F | 42.7°F | 45.4°F |
| Mar 19 | 43.3°F | 43.1°F | 46.3°F |
| Mar 20 | 43.2°F | 43.0°F | 45.3°F |
| Mar 21 | 43.2°F | 43.0°F | 45.8°F |
| Mar 22 | 44.2°F | 44.0°F | 46.5°F |
| Mar 23 | 44.0°F | 43.8°F | 46.6°F |
| Mar 24 | 43.9°F | 43.7°F | 46.5°F |
| Mar 25 | 43.8°F | 43.6°F | 43.2°F |
| Mar 26 | 44.1°F | 43.9°F | 46.7°F |
| Mar 27 | 44.3°F | 44.1°F | 44.9°F |
| Mar 28 | 44.3°F | 44.1°F | 45.8°F |
| Mar 29 | 44.5°F | 44.3°F | 45.5°F |
| Mar 30 | 44.7°F | 44.5°F | 45.5°F |
| Mar 31 | 45.0°F | 44.7°F | 45.3°F |
In Charleston, the months July through August offer comfortable swimming conditions, which amounts to 67 swimming days.
The warmest water in Charleston was recorded on July 20, 2020, reaching a 81.8°F. While the coldest temperature occurred on February 9, 2026, dipping to 32.0°F. The average readings by season are 41.4°F in Winter, 49.8°F in Spring, 73.5°F in Summer, and 63.3°F in Autumn.
The average temperature in March is slightly warmer than February's average of 38.7°F. And in April, the temperature is expected to rise further, potentially reaching an average of 49.2°F.
Popular neighboring cities and resorts
| City | Water temperature* | Distance** |
|---|---|---|
| Staten Island |
40.5°F
|
5mi |
| Coney Island |
40.9°F
|
13mi |
| Jersey City |
39.2°F
|
16mi |
| Brooklyn |
40.6°F
|
17mi |
| New York City |
39.2°F
|
17mi |
* current water temperature in this city
** straight line distance from Charleston