Marine Weather Net

Summerville, SC Weather Forecast


Marine Forecast: Charleston Harbor


Summerville, South Carolina

 Lat: 33.02N, Lon: 80.18W

Current Conditions Updated: 956 AM EDT FRI AUG 14 2026

Mostly Cloudy
Temp: 84°F
  • Humidity:
  • 74%
  • Winds:
  • 3 MPH WNW
  • Gusts:
  • N/A MPH
  • Barometer:
  • 30.11 in.
  • Dewpoint:
  • 75°F
  • Heat index:
  • 92°F

  • Sunrise:
  • 6:41 AM EDT
  • Sunset:
  • 8:05 PM EDT
  • Moonrise:
  • 8:42 AM EDT
  • Moonset:
  • 9:19 PM EDT

TODAY

MOSTLY SUNNY
Hi: 99°F
Lo: 79°F
Precip: 20%

SATURDAY

MOSTLY SUNNY
Hi: 99°F
Lo: 79°F
Precip: 40%

SUNDAY

MOSTLY SUNNY
Hi: 99°F
Lo: 79°F
Precip: 30%

MONDAY

SUNNY

Hi: 100°F
Lo: 79°F
Weather Forecast In Detail:
Forecast Issued: 537 AM EDT Fri Aug 14 2026

HEAT ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING
Today...Mostly sunny. A slight chance of showers and thunderstorms this afternoon. Highs in the upper 90s. Heat index values up to 110. Southwest winds around 5 mph. Chance of rain 20 percent.
Tonight...Partly cloudy. A slight chance of showers and thunderstorms in the evening. Lows in the upper 70s. Heat index values up to 107 early in the evening. Southwest winds around 5 mph. Chance of rain 20 percent.
Saturday...Mostly sunny. A chance of showers and thunderstorms in the afternoon. Highs in the upper 90s. Heat index values up to 112. West winds around 5 mph. Chance of rain 40 percent.
Saturday Night...Partly cloudy with a chance of showers. A chance of thunderstorms, mainly in the evening. Lows in the upper 70s. Southwest winds around 5 mph. Chance of rain 40 percent. Heat index values up to 107 early in the evening.
Sunday...Mostly sunny. A chance of showers and thunderstorms in the afternoon. Highs in the upper 90s. West winds around 5 mph. Chance of rain 30 percent. Heat index values up to 110.
Sunday Night...Partly cloudy. Lows in the upper 70s. Heat index values up to 105 early in the evening.
Monday...Sunny, hot with highs around 100. Heat index values up to 115.
Monday Night...Mostly clear. Lows in the upper 70s. 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 chance of showers and thunderstorms. Lows in the upper 70s. Chance of rain 40 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. Heat index values up to 105 early in the evening.
Thursday...Sunny with a slight chance of showers and thunderstorms. Highs in the upper 90s. Chance of rain 20 percent. Heat index values up to 110.
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