Charleston water temp
This data the coastal Charleston ocean water temperature today, tomorrow and the upcoming days. Besides, you can also get information about the weather and surf forecast, as well as the data on sunrise / sunset and moonrise / moonset at a given point on any given day.
Current ocean temperature in Charleston
Water temperature in Charleston today is 70.3°F. Based on our historical data over a period of ten years, the warmest water in this day in the Atlantic Ocean near Charleston was recorded in 2007 and was 76.5°F, and the coldest was recorded in 2022 at 69.6°F. Sea water temperature in Charleston is expected to drop to 69.8°F in the next 10 days. October average water temperature in Charleston is 74.7°F, the minimum temperature is 68.7°F, and the maximum is 82.4°F.
The swimming season in Charleston lasts from April to November. During those months, Charleston water temperature does not drop below 68°F and therefore suitable for comfortable swimming. The average water temperature in Charleston in winter reaches 60.6°F, in spring 66.9°F, in summer the average temperature rises to 82°F, and in autumn it is 74.1°F.
Charleston water temperature now
| October 25, 2025 |
|---|
| today temp |
| 70.3°F |
| October 24, 2025 |
|---|
| yesterday temp |
| 71.2°F |
The ocean salinity in Charleston is 33.63‰, and the average salinity of the World Ocean is 35‰.
Surf Forecast in Charleston for today
Another important indicators for a comfortable holiday on the beach are the presence and height of the waves, as well as the speed and direction of the wind. Please find below data on the swell size for Charleston. We calculate the swell size based on the mean wave height (trough to crest) of each third highest wave. For more information on surf forecasts for the next ten days, please visit sea state forecast Charleston. Data in table shown for October 25, 2025, time in GMT 0 format (you can change the time zone on the sea state forecast page)
| 0-3 h | 3-6 h | 6-9 h | 9-12 h |
|---|---|---|---|
| 1' 5" | 1' 10" | 2' 2" | 2' 6" |
| 0.44 m | 0.55 m | 0.65 m | 0.75 m |
| 12-15 h | 15-18 h | 18-21 h | 21-24 h |
|---|---|---|---|
| 2' 9" | 2' 10" | 2' 11" | 2' 9" |
| 0.83 m | 0.87 m | 0.88 m | 0.85 m |
Surf report in Charleston
Charleston weather forecast
Current temperature and weather
Data in a table show Charleston temperature today (October 25, 2025). For more information and forecast for a few days, go to the weather forecast Charleston.
| 0-3 h | 3-6 h | 6-9 h | 9-12 h |
|---|---|---|---|
 | | |  |
| 55.6°F | 52.5°F | 52°F | 57.2°F |
| 12-15 h | 15-18 h | 18-21 h | 21-24 h |
|---|---|---|---|
|  |  | |
| 67.5°F | 69.3°F | 67.5°F | 64.6°F |
You may also be interested in other sections of our site for Charleston: Sunrise and Sunset, Tides
Charleston water temperature by month
These figures shows the average, minimum and maximum monthly sea temperature in Charleston. In addition to the table values, the graph below displays of changes average surface temperature during the year. Values are calculated based on the data over the past 10 years. Using them, you can check the water temperature in Charleston on any day of this period that interests you. Click on the month link and you will see a table for each day, or alternatively you can view the temperature curve of the month and select 2 different years you want to compare, either in a table or as a curve
| Month | Avr | Min | Max | |
|---|---|---|---|---|
| January | 59.9°F | 44.8°F | 69.1°F | cold |
| Ocean water temperature in Charleston in January | ||||
| February | 59.4°F | 48.6°F | 68.4°F | cold |
| Ocean water temperature in Charleston in February | ||||
| March | 61.2°F | 53.6°F | 66.7°F | cold |
| Ocean water temperature in Charleston in March | ||||
| April | 66°F | 57.4°F | 73.9°F | cold |
| Ocean water temperature in Charleston in April | ||||
| May | 73.4°F | 67.3°F | 80.6°F | warm |
| Ocean water temperature in Charleston in May | ||||
| June | 79.9°F | 71.4°F | 84.7°F | hot |
| Ocean water temperature in Charleston in June | ||||
| July | 83.1°F | 79.5°F | 86.7°F | hot |
| Ocean water temperature in Charleston in July | ||||
| August | 83.3°F | 79.7°F | 86.5°F | hot |
| Ocean water temperature in Charleston in August | ||||
| September | 81°F | 74.3°F | 86.4°F | hot |
| Ocean water temperature in Charleston in September | ||||
| October | 74.7°F | 68.7°F | 82.4°F | warm |
| Ocean water temperature in Charleston in October | ||||
| November | 66.9°F | 57.4°F | 74.3°F | cold |
| Ocean water temperature in Charleston in November | ||||
| December | 62.4°F | 50.4°F | 70.3°F | cold |
| Ocean water temperature in Charleston in December | ||||
Chart monthly average water temperature in Charleston
