Charleston Weather Blog

Forecast explanations, atmospheric science, and other cool weather-related stuff for Charleston, SC

Friday & the weekend: Pleasantly warm; midday coastal flood issues

/ September 11, 2025 at 8:39 PM

More sunshine will show itself starting Friday and lasting into the weekend courtesy of continued high pressure and northeasterly winds keeping a feed of cooler and drier air coming in. All in all, we can expect lows in the mid-60s each morning, with highs peaking in the low to mid-80s in the afternoon. Fun fact: This looks like the first weekend since July 26-27 without at least a trace of rain at either of the climate sites, so suffice it to say, we are very, very due for a quiet weekend of weather.

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Quiet, comfortably warm weather continues through the weekend

/ September 10, 2025 at 11:54 PM

Thursday will run a bit on the cloudy side, but we’ll still see some peeks of sun at times to allow temperatures to warm from the mid-60s in the morning to the mid-80s in the afternoon. Northeasterly winds persist, keeping dewpoints relatively low and the air comfortably warm as a result. We will continue to contend with some salt water flooding around the midday high tide, which could close a few roads for those of us headed for an early lunch downtown.

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Tuesday: Northeast breeze persists, keeping us on the cooler side of normal

/ September 8, 2025 at 10:25 PM

Another quiet weather day is ahead as high pressure wedges across the area from the northeast. Expect a mix of sun and clouds with comfortable temperatures. We start the day in the mid-60s, warming to about 80° in the afternoon. It’ll be a bit breezy, with winds gusting around 15-20 MPH especially near the coast. These northeasterly winds will continue to drive tidal departures in Charleston Harbor above flood stage, and we should see minor to moderate flooding with the 9:35 AM high tide. Some flooding may have impacts on the tail end of the commute, so be prepared for delays if downtown is your destination.

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The week ahead: Cooler than normal temperatures with an elevated coastal flooding risk

/ September 7, 2025 at 10:47 PM

A front which helped stir up another round of heavy rain and flooding in downtown Charleston on Sunday will clear the area overnight into early Monday, yielding a week of comfortable temperatures with occasional slight shower and storm chances.

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