South Dewees Island Weather Forecast
- 78
- 89
Chance Thunderstorms
- 78
- 91
Slight Chance Thunderstorms
- 78
- 92
Mostly Sunny
- 79
- 92
Partly Sunny
- 79
- 91
Chance Thunderstorms
- 78
- 90
Chance Thunderstorms
Today 10 Aug Charleston
Mostly sunny. A slight chance of Showers and Thunderstorms in the Morning, then a chance of Showers and Thunderstorms in the afternoon. Highs in the lower 90s. Heat index Values up to 110. Southwest Winds around 5 Mph, increasing to 10 to 15 Mph in the afternoon. Chance of rain 50 percent.
Tonight 10 Aug Charleston
Partly cloudy. A slight chance of Showers and Thunderstorms in the evening. Lows in the upper 70s. Heat index Values up to 107 early in the evening. Southwest Winds 5 to 10 Mph with Gusts up to 20 Mph. Chance of rain 20 percent.
South Dewees Island Temperature Statistics
August Temperature
Mount Pleasant Regional-Faison Field (5 miles)
Lowest 5 August, 2026
73.4 °FAverage August
80.7 °FHighest 7 August, 2026
89.6 °F
Climate (2021–2026)
Mount Pleasant Regional-Faison Field (5 miles)
Average Low 2021–2026
58.3 °FAverage 2021–2026
66.4 °FAverage High 2021–2026
75.5 °F