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

August 26, 07:44

Trend:

stable

Yesterday:

76.1°F

Tomorrow:

75.7°F

Sunrise:

06:18

Sunset:

19:39

Day Length:

13 h. 21 min.

Charleston in September

Minimum:

36.8°F

Average:

41.4°F

Maximum:

43.1°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 about the same as 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 considerably lower than the average registered over the last two weeks, indicating a slight cooling 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 77.9°F on 2021, while the historical minimum was 73.1°F on 2024.

The water temperature over the last two weeks displayed soome variability. While the two week average stayed close to the historical average, there were some days when the temperature was close to the maximum recorded over the past years. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 75.3°F. Both minimum and maximum temperatures expected to be close to the average, offering a week of stable water conditions.

Daily water temperature in Charleston

Date Current Year

actual* / forecast**

last year 10 years average
Aug 12 79.0°F 77.2°F 77.0°F
Aug 13 78.9°F 78.1°F 77.2°F
Aug 14 77.9°F 78.8°F 77.4°F
Aug 15 77.0°F 79.1°F 77.3°F
Aug 16 77.3°F 79.4°F 77.1°F
Aug 17 77.1°F 79.0°F 76.9°F
Aug 18 76.2°F 79.0°F 76.9°F
Aug 19 77.3°F 79.4°F 77.1°F
Aug 20 78.1°F 77.1°F 77.0°F
Aug 21 77.2°F 76.3°F 76.7°F
Aug 22 75.3°F 74.9°F 75.9°F
Aug 23 76.3°F 72.2°F 75.6°F
Aug 24 77.2°F 73.8°F 75.5°F
Aug 25 76.1°F 73.5°F 75.5°F
Aug 26 75.4°F 73.7°F 75.3°F
Aug 27 75.7°F 73.7°F 75.6°F
Aug 28 75.8°F 73.1°F 75.7°F
Aug 29 75.6°F 72.2°F 75.5°F
Aug 30 75.5°F 73.0°F 75.4°F
Aug 31 75.5°F 72.5°F 75.3°F
Sep 1 75.1°F 71.9°F 75.0°F
Sep 2 74.2°F 72.8°F 74.1°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 74.8°F 5mi
Coney Island 74.1°F 13mi
Jersey City 74.3°F 16mi
Brooklyn 74.2°F 17mi
New York City 74.3°F 17mi

* current water temperature in this city

** straight line distance from Charleston