| NWS Forecast for: Coastal Chatham Issued by: National Weather Service Charleston, SC Last Update: 537 AM EDT Sat Jul 25 2026 | |
| Today: Partly sunny. A chance of showers and thunderstorms this afternoon. Highs in the lower 90s. Heat index values up to 108. Southwest winds around 5 mph. Chance of rain 50 percent. Tonight: Mostly cloudy with a chance of showers and thunderstorms in the evening, then partly cloudy with a slight chance of showers and thunderstorms after midnight. Lows in the upper 70s. Southwest winds around 5 mph. Chance of rain 50 percent. Sunday: Sunny with a slight chance of showers and thunderstorms in the morning, then partly sunny with showers and thunderstorms likely in the afternoon. Highs in the lower 90s. Heat index values up to 105. West winds 5 to 10 mph. Chance of rain 70 percent. Sunday Night: Mostly cloudy with showers with thunderstorms likely in the evening, then partly cloudy with a chance of showers with a slight chance of thunderstorms after midnight. Lows in the mid 70s. Southwest winds around 5 mph. Chance of rain 80 percent. Monday: Mostly sunny with a slight chance of showers. A slight chance of thunderstorms in the afternoon. Highs in the lower 90s. North winds around 5 mph, becoming east in the afternoon. Chance of rain 20 percent. Monday Night: Partly cloudy. Lows in the upper 70s. Tuesday: Sunny. Highs in the mid 90s. Heat index values up to 110. Tuesday Night: Mostly clear. Lows around 80. Heat index values up to 105 early in the evening. Wednesday: Sunny with a chance of showers and thunderstorms. Highs in the mid 90s. Chance of rain 50 percent. Heat index values up to 115 in the afternoon. Wednesday Night: Mostly cloudy with a chance of showers and thunderstorms. Lows in the upper 70s. Chance of rain 50 percent. Heat index values up to 110 early in the evening. Thursday: Sunny with a chance of showers and thunderstorms. Highs in the lower 90s. Chance of rain 30 percent. Heat index values up to 105. Thursday Night: Partly cloudy with a chance of showers and thunderstorms. Lows in the upper 70s. Chance of rain 30 percent. Friday: Mostly sunny with a chance of showers and thunderstorms. Highs in the lower 90s. Chance of rain 40 percent. | |
| Zone Forecast: Coastal Chatham | |
Visit your local NWS office at: https://www.weather.gov/chs |