All data are in degrees Fahrenheit

en

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

85.0

°F

August 11, 06:53

Trend:

increasing

Yesterday:

85.0°F

Tomorrow:

85.4°F

Sunrise:

06:40

Sunset:

20:09

Day Length:

13 h. 29 min.

Charleston in August

Minimum:

47.6°F

Average:

55.8°F

Maximum:

63.4°F

Sea water temperature in Charleston today

As of now, in Charleston, the water temperature is 85.0°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 1.1°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 rise a bit.

Recent sea temperature and forecast

Today's water temperature is slightly lower than the average registered over the last two weeks, indicating a slight cooling trend. It is also close to the historical maximum temperature for this date. The maximum temperature recorded for this date was 85.2°F on 2022, while the historical minimum was 81.4°F on 2018.

Over the last two weeks, the water temperature has stayed slightly above than historical averages for those days. The forecast for the upcoming week suggests a gradual increase. The average temperature is expected to rise up to 85.6°F, with minimum temperature starting at 85.4°F, while the maximum might reach 85.7°F.

Daily water temperature in Charleston

Date Current Year

actual* / forecast**

last year 10 years average
Jul 28 86.2°F 85.7°F 84.7°F
Jul 29 86.2°F 86.9°F 84.7°F
Jul 30 86.3°F 86.7°F 84.7°F
Jul 31 85.8°F 86.5°F 84.7°F
Aug 1 86.0°F 87.0°F 84.7°F
Aug 2 86.2°F 86.6°F 84.6°F
Aug 3 87.7°F 86.3°F 84.8°F
Aug 4 85.3°F 86.0°F 84.2°F
Aug 5 84.7°F 85.4°F 84.0°F
Aug 6 84.3°F 83.5°F 83.9°F
Aug 7 84.7°F 83.6°F 83.8°F
Aug 8 85.0°F 84.1°F 83.8°F
Aug 9 84.8°F 84.0°F 83.8°F
Aug 10 85.0°F 84.2°F 84.0°F
Aug 11 85.0°F 84.1°F 83.9°F
Aug 12 85.4°F 83.4°F 84.3°F
Aug 13 85.7°F 84.0°F 84.6°F
Aug 14 85.7°F 83.2°F 84.6°F
Aug 15 85.6°F 83.4°F 84.5°F
Aug 16 85.6°F 83.8°F 84.5°F
Aug 17 85.6°F 83.6°F 84.5°F
Aug 18 85.4°F 83.9°F 84.3°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 August 3, 2026, reaching a 87.7°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, 82.9°F in Summer, and 73.4°F in Autumn.