World sea water temperatures

Water temperature in Charleston (SC) in April

Is it warm enough to swim in Charleston in April? Average water temperature in Charleston in April is 66°F and therefore is not suitable for comfortable swimming. The warmest sea in Charleston in April is 73.9°F, and the coldest is 57.4°F. Average high air temperature in Charleston in April is 76°F, and average low temperature is 53°F. To find out the sea temperature today and in the coming days, go to Current sea temperature in Charleston

Changes water temperature in Charleston in April 2025, 2024

To get an accurate forecast for the water temperature in Charleston for any chosen month, compare two years within a 10 year range using the chart below. In addition to the sea water temperature in Charleston, the selected years in the table also show the values of the maximum and minimum temperatures on each of the days of April.

You can choose any other years:

Year 1:   Year 2:


Day 2025 2024 Min Max
April 163.3°F62.2°F57.4°F67.1°F
April 263.9°F62.8°F58.1°F67.1°F
April 364.9°F63.7°F58.6°F67.1°F
April 466.2°F63.5°F58.5°F68.9°F
April 567.5°F63.1°F58.6°F68°F
April 668°F63°F59.2°F68.5°F
April 767.5°F62.8°F60.1°F69.4°F
April 868.4°F63.1°F61.2°F68.4°F
April 966.9°F63.3°F60.8°F68.9°F
April 1066.6°F65.5°F61°F67.8°F
April 1166.7°F66°F60.6°F67.8°F
April 1266.4°F65.3°F61.5°F68°F
April 1366.2°F65.5°F62.6°F68.5°F
April 1466.4°F66.6°F62.2°F69.4°F
April 1566.9°F66.4°F63.1°F70°F
Day 2025 2024 Min Max
April 1667.1°F66.6°F62.8°F70.5°F
April 1767.3°F66.6°F63°F70.2°F
April 1868.5°F68.9°F62.4°F70°F
April 1968.9°F68.5°F63.3°F70°F
April 2070.5°F68.9°F63°F71.2°F
April 2171.1°F69.4°F63°F71.4°F
April 2269.6°F66.7°F63.1°F71.6°F
April 2371.2°F66.7°F63.5°F72°F
April 2471.1°F66.9°F64.6°F71.8°F
April 2570.9°F67.1°F65.1°F71.6°F
April 2672°F67.8°F65.3°F72°F
April 2771.2°F67.1°F66.2°F71.8°F
April 2870.7°F69.4°F66.2°F73.4°F
April 2970.9°F70.9°F66.4°F73.8°F
April 3070.9°F70.2°F66°F73.9°F
Charleston water temp chart in April

Average water temperature in Charleston in April over a decade

20162017201820192020
65.8°F68.7°F62.8°F65.8°F68.4°F
20212022202320242025
65.1°F66.9°F67.6°F66.2°F68.2°F

Charleston sea state in April

Chart comparing the height of waves in Charleston in April over the past years. The red line indicates the height of the waves when swimming in the sea is prohibited. To view the current sea conditions, click on the graph.

Waves height in Charleston in April

Weather and climate in Charleston in April

This data display average monthly climate indicators in Charleston in April based on our historical weather readings over a period of ten years. In addition to temperature, we include data on the number of rainy and sunny days so you can have all the information about your destination before your trip

  • Average HIGH temperature76°F
  • Average LOW temperature53°F
  • Average humidity
    68
  • Average rainfall days8 days
  • Average rainfall74mm/2.9''
  • Average daylight13h
  • Average sunshine9.2h
  • Average UV index9

Charleston water temperature during other months:

You can also view information about water temperature for other months by clicking on the month button below

Where is the warm sea water in April?

Want to know where the water temperature in April is good for swimming? Select the continent of interest, the day of the month and the required water temperature

Region
Date (day and month)
Water temperature: min 60°F
 Average temperature  Maximum temperature

Temperature in neighboring cities

The nearest locations with the average water temperature in April. In addition, the maximum and minimum water temperatures for that month, recorded over the last decade, are shown

AvrMinMax
Sullivan's Island66°F57.4°F73.9°F
Mount Pleasant66.2°F57°F74.1°F
Isle of Palms66°F57.6°F74.3°F
Folly Beach66°F57.6°F73.6°F
Kiawah Island66.2°F57.4°F73.6°F
Seabrook Island66.2°F57.6°F73.6°F
Edisto Island66.2°F57.7°F73.8°F
St. Helena Island66.6°F57.7°F74.1°F
Harbor Island66.6°F57.9°F73.9°F
Hunting Island66.4°F57.9°F73.9°F

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[1] - The "Blue Flag" is awarded to beaches which fulfill a number of criteria, including: the quality of the bathing water, which must be in accordance with the relevant European Union Directive environmental education and information and beach area management and safety.

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Our report for Charleston is compiled using satellite data together with in-situ observations to get the most reliable daily data of sea surface temperatures, surf forecasts, current temperatures and weather forecasts.

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