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

53.0

°F

December 21, 22:44

Trend:

increasing

Yesterday:

51.5°F

Tomorrow:

53.0°F

Sunrise:

07:18

Sunset:

17:18

Day Length:

10 h. 0 min.

Charleston in December

Minimum:

51.0°F

Average:

56.5°F

Maximum:

63.4°F

Sea water temperature in Charleston today

As of now, in Charleston, the water temperature is 53.0°F. Swimming in water of this temperature is considered as extremely cold, and there's a substantial risk of hypothermia if exposed for more than a brief duration. Today's reading is 4.7°F lower than the average recorded on this particular day in recent years. Since yesterday, there was a noticeable increase in temperature. This indicates a warming trend over the past day. 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 is also close to the historical minimum temperature for this date. The maximum temperature recorded for this date was 64.8°F on 2015, while the historical minimum was 53.1°F on 2023.

Observations from the last two weeks indicate that the water temperature was in proximity to the lowest values recorded on those days in the past. The forecast for the upcoming week shows a gradual cooling trend. The average temperature is expected to be 51.9°F, the minimum temperature may reach 51.0°F, and the maximum might stay at 53.0°F.

Daily water temperature in Charleston

Date Current Year

actual* / forecast**

last year 10 years average
Dec 7 59.0°F 56.5°F 59.8°F
Dec 8 59.5°F 54.9°F 59.7°F
Dec 9 59.8°F 54.2°F 59.6°F
Dec 10 57.1°F 55.7°F 59.5°F
Dec 11 55.2°F 55.5°F 59.3°F
Dec 12 54.3°F 53.8°F 58.9°F
Dec 13 51.8°F 55.0°F 58.3°F
Dec 14 53.6°F 54.7°F 58.4°F
Dec 15 55.3°F 55.3°F 58.6°F
Dec 16 54.4°F 55.1°F 58.0°F
Dec 17 52.6°F 55.3°F 57.8°F
Dec 18 50.6°F 56.3°F 57.9°F
Dec 19 52.1°F 58.6°F 58.0°F
Dec 20 51.5°F 58.1°F 57.7°F
Dec 21 53.0°F 58.2°F 57.7°F
Dec 22 53.0°F 56.5°F 57.7°F
Dec 23 52.5°F 55.7°F 57.2°F
Dec 24 52.2°F 53.8°F 56.9°F
Dec 25 51.9°F 52.9°F 56.6°F
Dec 26 51.3°F 52.7°F 56.0°F
Dec 27 51.0°F 52.0°F 55.7°F
Dec 28 51.1°F 52.3°F 55.8°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 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 56.9°F in Winter, 67.2°F in Spring, 82.8°F in Summer, and 73.5°F in Autumn.