Marine Weather Net

Summerville, SC Weather Forecast


Marine Forecast: Charleston Harbor


Summerville, South Carolina

 Lat: 33.02N, Lon: 80.18W

Current Conditions Updated: 356 AM EDT TUE JUL 28 2026

Partly Cloudy
Temp: 79°F
  • Humidity:
  • 93%
  • Winds:
  • 5 MPH SSW
  • Gusts:
  • N/A MPH
  • Barometer:
  • 29.79 in.
  • Dewpoint:
  • 77°F
  • Heat index:
  • 83°F

  • Sunrise:
  • 6:30 AM EDT
  • Sunset:
  • 8:21 PM EDT
  • Moonrise:
  • 8:06 PM EDT
  • Moonset:
  • 5:22 AM EDT

TONIGHT

MOSTLY CLEAR
Lo: 75°F

TUESDAY

MOSTLY SUNNY
Hi: 99°F
Lo: 77°F

WEDNESDAY

MOSTLY SUNNY
Hi: 95°F
Lo: 71°F
Precip: 20%

THURSDAY

SUNNY

Hi: 91°F
Lo: 71°F
Weather Forecast In Detail:
Forecast Issued: 222 AM EDT Tue Jul 28 2026

HEAT ADVISORY IN EFFECT FROM 11 AM THIS MORNING TO 8 PM EDT THIS EVENING
Rest Of Tonight...Mostly clear. Lows in the mid 70s. Light and variable winds.
Tuesday...Mostly sunny. Highs in the upper 90s. Heat index values up to 108. Southwest winds 5 to 10 mph.
Tuesday Night...Partly cloudy with a slight chance of thunderstorms. A slight chance of showers in the evening, then a chance of showers after midnight. Lows in the upper 70s. Heat index values up to 106 early in the evening. Southwest winds 5 to 10 mph with gusts up to 20 mph. Chance of rain 40 percent.
Wednesday...Mostly sunny. A slight chance of showers and thunderstorms in the afternoon. Highs in the mid 90s. Northwest winds 5 to 10 mph. Chance of rain 20 percent. Heat index values up to 107.
Wednesday Night...Mostly clear. A slight chance of showers and thunderstorms in the evening. Lows in the lower 70s. Northwest winds around 5 mph. Chance of rain 20 percent.
Thursday...Sunny. Highs in the lower 90s.
Thursday Night...Clear. Lows in the lower 70s.
Friday...Sunny. Highs in the mid 90s.
Friday Night...Partly cloudy. Lows in the lower 70s.
Saturday...Partly sunny with a chance of showers and thunderstorms. Highs in the lower 90s. Chance of rain 40 percent.
Saturday Night...Mostly cloudy with a chance of showers with a slight chance of thunderstorms. Lows in the mid 70s. Chance of rain 40 percent.
Sunday...Showers and thunderstorms likely. Highs in the lower 90s. Chance of rain 70 percent.
Sunday Night...Mostly 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 with a slight chance of thunderstorms. Highs in the lower 90s. Chance of rain 50 percent.
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