| NWS Forecast for: Coastal Chatham Issued by: National Weather Service Charleston, SC Last Update: 537 AM EDT Sun Jul 26 2026 |  |
| Today: Mostly sunny. Showers and thunderstorms likely this afternoon. Highs in the lower 90s. Heat index values up to 108. West winds 5 to 10 mph. Chance of rain 70 percent. Tonight: Mostly cloudy with showers and thunderstorms likely in the evening, then partly cloudy with a slight chance of showers and thunderstorms after midnight. Lows in the mid 70s. Southwest winds around 5 mph. Chance of rain 70 percent. Monday: Mostly sunny. Highs in the lower 90s. North winds around 5 mph, becoming east in the afternoon. Monday Night: Partly cloudy in the evening, then becoming mostly clear. Lows in the upper 70s. Southeast winds around 5 mph, becoming south after midnight. Tuesday: Sunny. Highs in the mid 90s. Southwest winds around 5 mph, increasing to south 10 to 15 mph in the afternoon. Heat index values up to 111. Tuesday Night: Partly cloudy with a 20 percent chance of showers. Lows in the lower 80s. Heat index values up to 110 early in the evening. Wednesday: Mostly sunny with a chance of showers and thunderstorms. Highs in the upper 90s. Chance of rain 50 percent. Heat index values up to 115. Wednesday Night: Partly cloudy with a chance of showers and thunderstorms. Lows in the upper 70s. Chance of rain 50 percent. Heat index values up to 105 early in the evening. Thursday: Sunny with a chance of showers and thunderstorms. Highs in the lower 90s. Chance of rain 30 percent. Thursday Night: Partly cloudy with a slight chance of showers and thunderstorms. Lows in the upper 70s. Chance of rain 20 percent. Friday: Sunny with a chance of showers and thunderstorms. Highs in the lower 90s. Chance of rain 30 percent. Friday Night: Partly cloudy with a slight chance of showers and thunderstorms. Lows in the upper 70s. Chance of rain 20 percent. Saturday: 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 |