Marine Weather Net

Charleston, SC Weather Forecast


Marine Forecast: Charleston Harbor


Charleston, South Carolina

 Lat: 32.78N, Lon: 79.94W

Current Conditions Updated: 356 AM EDT SUN AUG 16 2026

Clear


Temp: 77°F
  • Humidity:
  • 96%
  • Winds:
  • 5 MPH NNW
  • Gusts:
  • N/A MPH
  • Barometer:
  • 30.06 in.
  • Dewpoint:
  • 76°F
  • Heat index:
  • 78°F

  • Sunrise:
  • 6:42 AM EDT
  • Sunset:
  • 8:02 PM EDT
  • Moonrise:
  • 10:47 AM EDT
  • Moonset:
  • 10:13 PM EDT

TONIGHT

PARTLY CLOUDY
Lo: 75°F

SUNDAY

MOSTLY SUNNY
Hi: 95°F
Lo: 75°F
Precip: 50%

MONDAY

SUNNY

Hi: 99°F
Lo: 79°F

TUESDAY

SUNNY

Hi: 100°F
Lo: 75°F
Precip: 20%
Weather Forecast In Detail:
Forecast Issued: 232 AM EDT Sun Aug 16 2026

HEAT ADVISORY IN EFFECT FROM 11 AM THIS MORNING TO 8 PM EDT THIS EVENING
Rest Of Tonight...Partly cloudy. Lows in the mid 70s. Light and variable winds.
Sunday...Mostly sunny. A chance of showers and thunderstorms in the afternoon. Highs in the mid 90s. Heat index values up to 109. Light and variable winds, becoming south around 5 mph in the afternoon. Chance of rain 50 percent.
Sunday Night...Partly cloudy with a chance of showers and thunderstorms in the evening, then mostly clear after midnight. Lows in the mid 70s. South winds around 5 mph. Chance of rain 30 percent.
Monday...Sunny. Highs in the upper 90s. West winds around 5 mph. Heat index values up to 113.
Monday Night...Mostly clear. Lows in the upper 70s. Southwest winds around 5 mph. Heat index values up to 110 early in the evening.
Tuesday...Sunny with a slight chance of showers and thunderstorms. Hot with highs around 100. Chance of rain 20 percent. Heat index values up to 115.
Tuesday Night...Partly cloudy with a slight chance of showers and thunderstorms. Lows in the mid 70s. Chance of rain 20 percent. Heat index values up to 110 early in the evening.
Wednesday...Mostly sunny with a chance of showers and thunderstorms. Highs in the upper 90s. Chance of rain 50 percent. Heat index values up to 110.
Wednesday Night...Partly cloudy with a slight chance of showers and thunderstorms. Lows in the mid 70s. Chance of rain 20 percent.
Thursday...Mostly sunny with a chance of showers and thunderstorms. Highs in the upper 90s. Chance of rain 30 percent. Heat index values up to 110.
Thursday Night...Partly cloudy with a slight chance of showers and thunderstorms. Lows in the mid 70s. Chance of rain 20 percent. Heat index values up to 105 early in the evening.
Friday...Mostly sunny with a chance of showers and thunderstorms. Highs in the mid 90s. Chance of rain 40 percent. Heat index values up to 110.
Friday Night...Partly cloudy with a chance of showers and thunderstorms. Lows in the mid 70s. Chance of rain 50 percent.
Saturday...Mostly sunny with a chance of showers and thunderstorms. Highs in the lower 90s. Chance of rain 50 percent.
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