Currently

81°
Feels Like 89°
Mostly Clear
last updated at 4:56 AM on August 20, 2026

Weather Alerts

Issued by the National Weather Service, last updated at 6:10 AM on August 20, 2026

Charleston Weather Discussion

The latest forecast and discussion for the Charleston, SC metro area

Thursday: Heat advisories continue ahead of a more unsettled weekend

/ August 19, 2026 at 11:38 PM

Another hot day lies ahead on Thursday, but we do have some changes coming that will turn conditions a little more unsettled, which in turn will start to take the edge off this heat some.

That being said, Thursday will mark the ninth consecutive day of heat headlines of some sort, whether it be a Heat Advisory or an Extreme Heat Warning, and it’s getting very difficult to find new ways to tell you it’s going to be hot. We start Thursday in the upper 70s to low 80s once again, with air temperatures in the afternoon peaking in the mid-90s. Heat indices will once again peak between 108-112° — not as bad as it has been, but still pretty gnarly — and that’s prompted the aforementioned heat advisory for Charleston and Berkeley counties. (Looks like we’ll fall short of heat advisory criteria in Dorchester County, but it will still be quite hot to the point where you’ll want to monitor for heat illness if outdoors for an extended period.) A few of us should see some isolated to scattered thunderstorms in the afternoon along and ahead of the seabreeze. There’s not much shear and storm motions will be slow, so heavy rain will continue to be a concern, and with plenty of instability available, storms could produce frequent lightning and gusty winds in downbursts. Be ready for conditions to change on a dime if out and about.

Read more »

Charleston Area NWS Forecast

Forecast for Charleston updated at 5:37 AM on August 20, 2026