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

75.4

°F

May 20, 03:49

Trend:

stable

Yesterday:

75.4°F

Tomorrow:

75.6°F

Sunrise:

06:17

Sunset:

20:16

Day Length:

13 h. 59 min.

Charleston in May

Minimum:

49.2°F

Average:

58.8°F

Maximum:

65.9°F

Sea water temperature in Charleston today

As of now, in Charleston, the water temperature is 75.4°F. It's safe to say that the water is comfortably warm for various water-related activities. Today's reading is 0.6°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 slightly varies from the average of the past two weeks. 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 76.2°F on 2017, while the historical minimum was 72.8°F on 2014.

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 76.6°F, with minimum temperature starting at 75.6°F, while the maximum might reach 77.4°F.

Daily water temperature in Charleston

Date Current Year

actual* / forecast**

last year 10 years average
May 6 75.5°F 69.0°F 72.3°F
May 7 74.8°F 69.5°F 72.6°F
May 8 74.8°F 69.7°F 72.5°F
May 9 75.8°F 70.5°F 72.4°F
May 10 75.9°F 71.2°F 72.6°F
May 11 75.7°F 72.0°F 72.4°F
May 12 76.4°F 72.8°F 73.1°F
May 13 76.4°F 72.6°F 73.2°F
May 14 76.5°F 73.0°F 73.3°F
May 15 73.5°F 73.8°F 73.4°F
May 16 75.4°F 73.5°F 73.6°F
May 17 74.6°F 74.8°F 73.7°F
May 18 75.2°F 75.5°F 74.0°F
May 19 75.4°F 75.7°F 74.5°F
May 20 75.4°F 75.0°F 74.8°F
May 21 75.6°F 73.3°F 75.0°F
May 22 76.2°F 74.4°F 75.6°F
May 23 76.4°F 74.5°F 75.9°F
May 24 76.6°F 74.4°F 76.0°F
May 25 76.9°F 74.4°F 76.3°F
May 26 77.1°F 74.0°F 76.5°F
May 27 77.4°F 74.1°F 76.9°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 September 16, 2023, reaching a 86.9°F. While the coldest temperature occurred on December 29, 2022, dipping to 47.1°F. The average readings by season are 57.8°F in Winter, 67.1°F in Spring, 82.6°F in Summer, and 73.9°F in Autumn.