Marine Weather Net

Johns Island, SC Weather Forecast




Johns Island, South Carolina

 Lat: 32.72N, Lon: 80.06W

Current Conditions Updated: 1256 PM EDT WED JUN 18 2025

Partly Cloudy
Temp: 91°F
  • Humidity:
  • 55%
  • Winds:
  • 9 MPH WSW
  • Gusts:
  • N/A MPH
  • Barometer:
  • 30.12 in.
  • Dewpoint:
  • 73°F
  • Heat index:
  • 99°F

  • Sunrise:
  • 6:11 AM EDT
  • Sunset:
  • 8:29 PM EDT
  • Moonrise:
  • 1:08 AM EDT
  • Moonset:
  • 1:46 PM EDT

REST OF TODAY

SUNNY

Lo: 79°F
Precip: 20%

JUNETEENTH

SUNNY

Hi: 90°F
Lo: 75°F
Precip: 40%

FRIDAY

MOSTLY SUNNY
Hi: 90°F
Lo: 75°F
Precip: 50%

SATURDAY

MOSTLY SUNNY
Hi: 89°F
Lo: 75°F
Precip: 40%
Weather Forecast In Detail:
Forecast Issued: 1013 AM EDT Wed Jun 18 2025

Rest Of Today...Sunny. A slight chance of showers and thunderstorms this afternoon. Highs in the lower 90s, except in the upper 80s near the coast. Southwest winds 10 to 15 mph. Chance of rain 20 percent.
Tonight...Partly cloudy. Lows in the upper 70s. Southwest winds 10 to 15 mph with gusts up to 25 mph.
Juneteenth...Sunny. A slight chance of showers in the morning, then a chance of showers and thunderstorms in the afternoon. Highs around 90. Southwest winds 5 to 10 mph, increasing to 15 to 20 mph in the afternoon. Chance of rain 40 percent.
Thursday Night...Partly cloudy with a chance of showers and thunderstorms. Lows in the mid 70s. Southwest winds 15 to 20 mph, diminishing to 5 to 10 mph after midnight. Chance of rain 50 percent.
Friday...Mostly sunny with a chance of showers. A slight chance of thunderstorms in the morning, then a chance of thunderstorms in the afternoon. Highs around 90. Southwest winds 5 to 10 mph. Chance of rain 50 percent.
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 upper 80s. Chance of rain 40 percent.
Saturday Night...Mostly clear. Lows in the mid 70s.
Sunday...Sunny with a slight chance of showers and thunderstorms. Highs around 90. Chance of rain 20 percent.
Sunday Night...Mostly clear. Lows in the mid 70s.
Monday...Sunny. Highs around 90.
Monday Night...Mostly clear. Lows in the mid 70s.
Tuesday...Sunny. Highs around 90.
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