Charleston Weather Blog

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

Weekend forecast: Heat wave ramps up with dangerous heat indices, especially Sunday

/ July 25, 2025 at 7:10 PM

This is one of those weekends where you probably want to just stay in a nice, cool place as a heat wave begins to ramp up across the Lowcountry, with the potential for several record highs and record warm low temperatures to occur starting Saturday through much of next week.

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Friday & the weekend: Dangerous heat wave begins

/ July 24, 2025 at 8:39 PM

Anomalously strong high pressure builds in aloft starting Friday, bringing about the hottest weather of the year. We’ll challenge record high temperatures as well as record warm low temperatures, with heat advisories and even Extreme Heat Warnings a likelihood.

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Thursday: Scattered storms possible, but taper off ahead of a hot weekend

/ July 23, 2025 at 8:54 PM

The stationary front that’s been lingering nearby will begin to fall apart on Thursday as high pressure begins to build in, bringing storm chances down and temperatures up especially as we head into the weekend, which looks particularly hot.

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Rest of the work week: A couple more unsettled days before late-July heat returns

/ July 22, 2025 at 10:49 PM

The stalled front that brought us some flooding rains and severe weather on Tuesday lingers over the next couple days before high pressure nudges in, sending rain chances down and temperatures up for Friday.

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Tuesday: Thunderstorms developing this afternoon, with heavy rain and flooding possible

/ at 8:14 AM

Thunderstorms will feature prominently in today’s forecast as the seabreeze pushes inland and a front drops in from the north.

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