Marine Weather Net

Johns Island, SC Weather Forecast




Johns Island, South Carolina

 Lat: 32.72N, Lon: 80.06W

Current Conditions Updated: 356 PM EDT WED SEP 24 2025

Partly Cloudy
Temp: 90°F
  • Humidity:
  • 57%
  • Winds:
  • 10 MPH SSE
  • Gusts:
  • N/A MPH
  • Barometer:
  • 30 in.
  • Dewpoint:
  • 73°F
  • Heat index:
  • 98°F

  • Sunrise:
  • 7:08 AM EDT
  • Sunset:
  • 7:14 PM EDT
  • Moonrise:
  • 9:43 AM EDT
  • Moonset:
  • 8:31 PM EDT

TONIGHT

PARTLY CLOUDY
Lo: 71°F

THURSDAY

SUNNY

Hi: 90°F
Lo: 71°F

FRIDAY

MOSTLY SUNNY
Hi: 89°F
Lo: 70°F
Precip: 50%

SATURDAY

CHANCE OF T-STORM
Hi: 81°F
Lo: 69°F
Precip: 70%
Weather Forecast In Detail:
Forecast Issued: 322 PM EDT Wed Sep 24 2025

Tonight...Mostly clear this evening, then becoming partly cloudy. Lows in the lower 70s. South winds 5 to 10 mph.
Thursday...Sunny. Highs around 90, except in the mid 80s near the coast. South winds 5 to 10 mph.
Thursday Night...Mostly clear in the evening, then becoming partly cloudy. A slight chance of showers and thunderstorms. Lows in the lower 70s. South winds 5 to 10 mph. Chance of rain 20 percent.
Friday...Mostly sunny. A slight chance of showers and thunderstorms in the morning, then a chance of showers and thunderstorms in the afternoon. Highs in the upper 80s. Southwest winds 5 to 10 mph. Chance of rain 50 percent.
Friday Night...Mostly cloudy with a chance of showers. A chance of thunderstorms, mainly in the evening. Lows around 70. Southwest winds around 5 mph. Chance of rain 50 percent.
Saturday...Showers likely with a chance of thunderstorms. Highs in the lower 80s. Chance of rain 70 percent.
Saturday Night...Mostly cloudy with a chance of showers with a slight chance of thunderstorms. Lows in the upper 60s. Chance of rain 50 percent.
Sunday...Partly sunny with a chance of showers and thunderstorms. Highs in the lower 80s. Chance of rain 50 percent.
Sunday Night...Mostly cloudy with a chance of showers with a slight chance of thunderstorms. Lows around 70. Chance of rain 50 percent.
Monday...Partly sunny with a chance of showers and thunderstorms. Highs in the lower 80s. Chance of rain 50 percent.
Monday Night...Mostly cloudy with a slight chance of showers and thunderstorms. Lows in the upper 60s. Chance of rain 20 percent.
Tuesday...Partly sunny with a chance of showers with a slight chance of thunderstorms. Highs in the lower 80s. Chance of rain 30 percent.
Tuesday Night...Partly cloudy with a 20 percent chance of showers. Lows in the mid 60s.
Wednesday...Mostly sunny with a slight chance of showers and thunderstorms. Highs around 80. Chance of rain 20 percent.
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