All data are in degrees Fahrenheit

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Water temperature in Charleston

Detailed information about the current water temperature in Charleston. The trend over the last two weeks, daily averages, and precise forecast of the water temperature changes. Gain a deeper understanding of seasonal dynamics with monthly statistical analyses covering recent years.
Sea temperature in Charleston now

71.1

°F

April 24, 01:43

Trend:

increasing

Yesterday:

70.7°F

Tomorrow:

71.3°F

Sunrise:

06:40

Sunset:

19:56

Day Length:

13 h. 16 min.

Charleston in April

Minimum:

50.4°F

Average:

57.9°F

Maximum:

66.5°F

Sea water temperature in Charleston today

As of now, in Charleston, the water temperature is 71.1°F. Swimming in water of this temperature is seen as relatively warm and enjoyable for some individuals, although many might find it slightly too cool. Today's reading is 2.7°F higher than the average recorded on this particular day in recent years. Since yesterday, there was a slight increase in temperature. This indicates a warming trend over the past day. According to the forecast, we expect the temperature to rise a bit.

Recent sea temperature and forecast

Today's water temperature is notably higher than the average recorded over the past two weeks, indicating a significant warming trend. It is also close to the historical maximum temperature for this date. The maximum temperature recorded for this date was 72.1°F on 2017, while the historical minimum was 64.6°F on 2018.

The water temperature over the last two weeks displayed soome variability. While the two week average stayed close to the historical average, there were some days when the temperature was close to the maximum recorded over the past years. The forecast for the upcoming week suggests a gradual increase. The average temperature is expected to rise up to 72.2°F, with minimum temperature starting at 71.3°F, while the maximum might reach 73.5°F.

Daily water temperature in Charleston

Date Current Year

actual* / forecast**

last year 10 years average
Apr 10 68.1°F 63.6°F 65.4°F
Apr 11 66.5°F 66.8°F 65.5°F
Apr 12 69.1°F 67.1°F 65.7°F
Apr 13 67.8°F 66.5°F 65.8°F
Apr 14 67.1°F 65.9°F 66.5°F
Apr 15 68.0°F 65.7°F 66.9°F
Apr 16 67.2°F 66.7°F 67.3°F
Apr 17 67.0°F 67.4°F 67.3°F
Apr 18 67.0°F 66.8°F 67.0°F
Apr 19 68.3°F 68.4°F 67.6°F
Apr 20 68.5°F 69.6°F 67.9°F
Apr 21 68.9°F 70.3°F 68.1°F
Apr 22 70.4°F 70.4°F 68.5°F
Apr 23 70.7°F 69.5°F 68.0°F
Apr 24 71.1°F 67.9°F 68.4°F
Apr 25 71.3°F 67.3°F 68.6°F
Apr 26 71.4°F 67.7°F 68.7°F
Apr 27 71.7°F 69.0°F 69.0°F
Apr 28 72.2°F 68.8°F 69.4°F
Apr 29 73.0°F 71.2°F 70.3°F
Apr 30 72.8°F 68.9°F 70.1°F
May 1 73.5°F 70.3°F 70.8°F

* actual - actual temperature values

** forecast - projected values for the next week

Real-time coastal temperatures could deviate by several degrees from the provided readings. These deviations often become evident following intense rainfall or strong winds.

Our forecasting methodology leverages a mathematical model, that uses current water and weather conditions, historical records, wind intensity and direction.

Sea water temperature in Charleston by month

In Charleston, the months May through October offer comfortable swimming conditions, which amounts to 156 swimming days.
The warmest water in Charleston was recorded on July 19, 2024, reaching a 87.3°F. While the coldest temperature occurred on January 26, 2025, dipping to 44.2°F. The average readings by season are 57.0°F in Winter, 67.1°F in Spring, 82.7°F in Summer, and 73.7°F in Autumn.