Marine Weather Net

Summerville, SC Weather Forecast


Marine Forecast: Charleston Harbor


Summerville, South Carolina

 Lat: 33.02N, Lon: 80.18W

Current Conditions Updated: 256 AM EDT THU JUN 18 2026

Partly Cloudy
Temp: 75°F
  • Humidity:
  • 90%
  • Winds:
  • 7 MPH SSW
  • Gusts:
  • N/A MPH
  • Barometer:
  • 29.96 in.
  • Dewpoint:
  • 72°F
  • Heat index:
  • 75°F

  • Sunrise:
  • 6:10 AM EDT
  • Sunset:
  • 8:30 PM EDT
  • Moonrise:
  • 10:01 AM EDT
  • Moonset:
  • 11:54 PM EDT

TONIGHT

CLEAR

Lo: 75°F

THURSDAY

PARTLY SUNNY
Hi: 95°F
Lo: 71°F
Precip: 70%

JUNETEENTH

PARTLY SUNNY
Hi: 89°F
Lo: 71°F
Precip: 90%

SATURDAY

MOSTLY SUNNY
Hi: 91°F
Lo: 70°F
Weather Forecast In Detail:
Forecast Issued: 222 AM EDT Thu Jun 18 2026

Rest Of Tonight...Clear. Lows in the mid 70s. Southwest winds 5 to 10 mph.
Thursday...Sunny in the morning, then partly sunny with showers and thunderstorms likely in the afternoon. Highs in the mid 90s. Southwest winds 5 to 10 mph with gusts up to 25 mph. Chance of rain 70 percent.
Thursday Night...Mostly cloudy with a chance of showers. Thunderstorms likely after midnight. Lows in the lower 70s. Southwest winds 5 to 10 mph with gusts up to 20 mph. Chance of rain 70 percent.
Juneteenth...Mostly cloudy with showers and thunderstorms in the morning, then partly sunny with a chance of showers in the afternoon. Highs in the upper 80s. Southwest winds 10 to 15 mph with gusts up to 30 mph. Chance of rain 90 percent.
Friday Night...A slight chance of thunderstorms in the evening. Mostly cloudy with a slight chance of showers. Lows in the lower 70s. West winds 5 to 10 mph. Chance of rain 20 percent.
Saturday...Mostly sunny. Highs in the lower 90s.
Saturday Night...Partly cloudy. Lows around 70.
Sunday...Mostly sunny with a slight chance of showers and thunderstorms. Highs in the lower 90s. Chance of rain 20 percent.
Sunday Night...Partly cloudy with a slight chance of showers and thunderstorms. Lows in the lower 70s. Chance of rain 20 percent.
Monday...Mostly sunny with a chance of showers and thunderstorms. Highs in the mid 90s. Chance of rain 30 percent.
Monday Night...Partly cloudy with a slight chance of showers and thunderstorms. Lows in the mid 70s. Chance of rain 20 percent.
Tuesday...Mostly sunny with a chance of showers and thunderstorms. Highs in the lower 90s. Chance of rain 40 percent.
Tuesday Night...Partly cloudy with a chance of showers with a slight chance of thunderstorms. Lows in the lower 70s. Chance of rain 40 percent.
Wednesday...Mostly sunny with a chance of showers and thunderstorms. Highs in the lower 90s. Chance of rain 40 percent.
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