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

65.8

°F

October 6, 04:37

Trend:

stable

Yesterday:

65.7°F

Tomorrow:

65.6°F

Sunrise:

06:58

Sunset:

18:31

Day Length:

11 h. 33 min.

Charleston in October

Minimum:

35.9°F

Average:

40.9°F

Maximum:

43.4°F

Sea water temperature in Charleston today

As of now, in Charleston, the water temperature is 65.8°F. Swimming in water of this temperature is generally concidered to be cool, and most people won't really enjoy it. Today's reading is 1.5°F lower 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 fall 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 is also close to the historical minimum temperature for this date. The maximum temperature recorded for this date was 69.2°F on 2018, while the historical minimum was 64.9°F on 2022.

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 minimum recorded over the past years. The forecast for the upcoming week shows a gradual cooling trend. The average temperature is expected to be 64.6°F, the minimum temperature may reach 63.2°F, and the maximum might stay at 65.8°F.

Daily water temperature in Charleston

Date Current Year

actual* / forecast**

last year 10 years average
Sep 22 72.8°F 70.6°F 71.2°F
Sep 23 71.7°F 70.3°F 71.0°F
Sep 24 70.0°F 70.5°F 70.6°F
Sep 25 68.5°F 71.0°F 70.1°F
Sep 26 67.4°F 70.4°F 69.6°F
Sep 27 66.5°F 70.8°F 69.3°F
Sep 28 66.2°F 71.9°F 69.1°F
Sep 29 66.4°F 72.0°F 69.3°F
Sep 30 66.0°F 71.5°F 68.9°F
Oct 1 66.0°F 71.9°F 68.7°F
Oct 2 66.9°F 71.5°F 68.2°F
Oct 3 65.9°F 69.7°F 67.9°F
Oct 4 66.3°F 68.8°F 67.6°F
Oct 5 65.7°F 68.6°F 67.3°F
Oct 6 65.8°F 69.1°F 67.4°F
Oct 7 65.6°F 69.8°F 67.1°F
Oct 8 65.8°F 69.9°F 67.3°F
Oct 9 65.3°F 69.3°F 66.8°F
Oct 10 64.7°F 68.8°F 66.2°F
Oct 11 64.0°F 67.0°F 65.5°F
Oct 12 63.7°F 66.4°F 65.3°F
Oct 13 63.2°F 65.8°F 64.7°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 71 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 65.4°F 5mi
Coney Island 65.1°F 13mi
Jersey City 65.9°F 16mi
Brooklyn 65.4°F 17mi
New York City 65.9°F 17mi

* current water temperature in this city

** straight line distance from Charleston