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

69.2

°F

April 8, 09:18

Trend:

decreasing

Yesterday:

69.4°F

Tomorrow:

69.2°F

Sunrise:

06:59

Sunset:

19:45

Day Length:

12 h. 46 min.

Charleston in April

Minimum:

50.4°F

Average:

57.0°F

Maximum:

66.5°F

Sea water temperature in Charleston today

As of now, in Charleston, the water temperature is 69.2°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 3.5°F higher than the average recorded on this particular day in recent years. The sea temperature remains approximately unchanged from yesterday. According to the forecast, we expect the temperature to stay about the same.

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 70.1°F on 2025, while the historical minimum was 62.5°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. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 69.4°F. Both minimum and maximum temperatures expected to be close to the average, offering a week of stable water conditions.

Daily water temperature in Charleston

Date Current Year

actual* / forecast**

last year 10 years average
Mar 25 61.4°F 61.5°F 61.5°F
Mar 26 60.1°F 62.1°F 61.6°F
Mar 27 62.1°F 61.4°F 62.0°F
Mar 28 62.9°F 61.3°F 62.0°F
Mar 29 64.0°F 62.2°F 62.3°F
Mar 30 62.9°F 62.0°F 62.4°F
Mar 31 61.4°F 62.2°F 63.0°F
Apr 1 63.1°F 65.2°F 63.4°F
Apr 2 63.6°F 65.1°F 63.7°F
Apr 3 64.5°F 65.2°F 63.8°F
Apr 4 66.6°F 67.2°F 64.1°F
Apr 5 67.6°F 68.5°F 64.6°F
Apr 6 67.6°F 68.1°F 64.8°F
Apr 7 69.4°F 69.7°F 65.3°F
Apr 8 69.2°F 70.1°F 65.6°F
Apr 9 69.2°F 68.4°F 65.6°F
Apr 10 68.9°F 68.1°F 65.3°F
Apr 11 68.9°F 66.5°F 65.3°F
Apr 12 69.2°F 69.1°F 65.6°F
Apr 13 69.3°F 67.8°F 65.8°F
Apr 14 70.0°F 67.1°F 66.4°F
Apr 15 70.5°F 68.0°F 66.9°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 157 swimming days.
The warmest water in Charleston was recorded on July 19, 2024, reaching a 87.3°F. While the coldest temperature occurred on February 4, 2026, dipping to 44.0°F. The average readings by season are 56.0°F in Winter, 67.2°F in Spring, 82.8°F in Summer, and 73.4°F in Autumn.