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

76.2

°F

July 16, 01:13

Trend:

increasing

Yesterday:

75.3°F

Tomorrow:

76.3°F

Sunrise:

05:40

Sunset:

20:26

Day Length:

14 h. 46 min.

Charleston in July

Minimum:

36.9°F

Average:

41.9°F

Maximum:

43.5°F

Sea water temperature in Charleston today

As of now, in Charleston, the water temperature is 76.2°F. It's safe to say that the water is comfortably warm for various water-related activities. Today's reading is 0.8°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 notably higher than the average recorded over the past two weeks, indicating a significant warming trend. It also aligns closely with the historical average temperature for this date, indicating a typical climate pattern. The maximum temperature recorded for this date was 81.8°F on 2025, while the historical minimum was 74.1°F on 2017.

Over the last two weeks, the water temperature has stayed slightly lower 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 76.6°F, with minimum temperature starting at 76.1°F, while the maximum might reach 77.1°F.

Daily water temperature in Charleston

Date Current Year

actual* / forecast**

last year 10 years average
Jul 2 74.1°F 77.2°F 73.5°F
Jul 3 76.0°F 75.3°F 73.5°F
Jul 4 77.7°F 75.1°F 74.2°F
Jul 5 75.2°F 74.4°F 74.0°F
Jul 6 74.5°F 75.3°F 74.6°F
Jul 7 73.7°F 76.5°F 75.3°F
Jul 8 73.5°F 76.7°F 75.3°F
Jul 9 74.2°F 76.9°F 75.2°F
Jul 10 74.2°F 75.8°F 75.4°F
Jul 11 74.8°F 75.7°F 75.7°F
Jul 12 74.5°F 77.2°F 75.8°F
Jul 13 74.8°F 75.4°F 75.7°F
Jul 14 75.1°F 79.3°F 76.4°F
Jul 15 75.3°F 77.8°F 76.1°F
Jul 16 76.2°F 81.8°F 77.0°F
Jul 17 76.3°F 79.4°F 77.1°F
Jul 18 76.1°F 79.0°F 76.9°F
Jul 19 76.2°F 78.1°F 77.1°F
Jul 20 77.0°F 78.0°F 77.8°F
Jul 21 77.1°F 78.2°F 77.9°F
Jul 22 77.1°F 78.6°F 77.9°F
Jul 23 76.8°F 77.7°F 77.6°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 July through August offer comfortable swimming conditions, which amounts to 69 swimming days.
The warmest water in Charleston was recorded on July 20, 2020, reaching a 81.8°F. While the coldest temperature occurred on February 9, 2026, dipping to 32.0°F. The average readings by season are 41.4°F in Winter, 49.8°F in Spring, 73.5°F in Summer, and 63.3°F in Autumn.

Popular neighboring cities and resorts

City Water temperature* Distance**
Staten Island 74.3°F 5mi
Coney Island 72.8°F 13mi
Jersey City 73.8°F 16mi
Brooklyn 73.1°F 17mi
New York City 73.8°F 17mi

* current water temperature in this city

** straight line distance from Charleston