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

83.5

°F

August 8, 02:41

Trend:

decreasing

Yesterday:

83.6°F

Tomorrow:

83.4°F

Sunrise:

06:38

Sunset:

20:12

Day Length:

13 h. 34 min.

Charleston in August

Minimum:

47.6°F

Average:

56.7°F

Maximum:

64.9°F

Sea water temperature in Charleston today

As of now, in Charleston, the water temperature is 83.5°F. Swimming in water of this temperature is considered highly warm and would be enjoyable for everyone. At this temperature, you can comfortably engage in water-based activities for extended periods without experiencing discomfort. Today's reading is 0.2°F lower 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 considerably lower than the average registered over the last two weeks, indicating a slight cooling trend. It also falls within the range of the average temperature recorded for this date, suggesting a consistent weather trend. The maximum temperature recorded for this date was 86.0°F on 2023, while the historical minimum was 82.2°F on 2018.

Observations from the last two weeks indicate that the water temperature was in proximity to the highest values recorded on those days in the past. The forecast for the upcoming week suggests a gradual increase. The average temperature is expected to rise up to 84.0°F, with minimum temperature starting at 83.4°F, while the maximum might reach 84.5°F.

Daily water temperature in Charleston

Date Current Year

actual* / forecast**

last year 10 years average
Jul 25 85.1°F 84.6°F 84.4°F
Jul 26 85.2°F 84.7°F 84.4°F
Jul 27 85.3°F 84.7°F 84.3°F
Jul 28 85.7°F 84.5°F 84.4°F
Jul 29 86.9°F 84.0°F 84.5°F
Jul 30 86.7°F 83.9°F 84.3°F
Jul 31 86.5°F 84.2°F 84.4°F
Aug 1 87.0°F 84.2°F 84.5°F
Aug 2 86.6°F 84.0°F 84.4°F
Aug 3 86.3°F 84.9°F 84.4°F
Aug 4 86.0°F 85.3°F 84.0°F
Aug 5 85.4°F 85.1°F 83.9°F
Aug 6 83.5°F 85.2°F 83.9°F
Aug 7 83.6°F 83.5°F 83.8°F
Aug 8 83.5°F 82.4°F 83.7°F
Aug 9 83.4°F 82.1°F 83.6°F
Aug 10 83.6°F 82.3°F 83.8°F
Aug 11 83.7°F 82.4°F 83.8°F
Aug 12 84.1°F 82.9°F 84.3°F
Aug 13 84.4°F 83.1°F 84.5°F
Aug 14 84.5°F 83.2°F 84.7°F
Aug 15 84.4°F 83.1°F 84.6°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 January 26, 2025, dipping to 44.2°F. The average readings by season are 57.0°F in Winter, 67.2°F in Spring, 82.8°F in Summer, and 73.7°F in Autumn.