South Dewees Island, SC Weather Forecast and Current Conditions

Day Sky High / Low Precip Wind Humidity
Sun
Aug 2 		Heavy Thunderstorms
Close Hourly 		85º / 76º 100% SSW 17 mph 88%
10am Thunderstorms 79º 97% SW 8 mph 96%
11am Heavy Thunderstorms 80º 84% SW 9 mph 94%
12pm Heavy Thunderstorms 81º 99% SSW 13 mph 91%
1pm Thunderstorms 83º 88% SSW 16 mph 87%
2pm Thunderstorms 84º 79% SSW 17 mph 85%
3pm Cloudy 85º 14% SSW 18 mph 83%
4pm Cloudy 84º 10% SSW 18 mph 82%
5pm Mostly Cloudy 84º 17% SSW 16 mph 85%
6pm Cloudy 83º 24% SSW 17 mph 87%
7pm Cloudy 83º 23% SSW 15 mph 88%
8pm Scattered Thunderstorms 82º 37% SSW 13 mph 89%
9pm Scattered Thunderstorms 81º 37% SSW 11 mph 92%
10pm Scattered Thunderstorms 80º 41% SSW 10 mph 93%
11pm Cloudy 81º 21% SSW 10 mph 91%
Mon
Aug 3 		Scattered Thunderstorms
View Hourly 		84º / 76º 51% SW 13 mph 89%
12am Mostly Cloudy 80º 23% SSW 11 mph 93%
1am Scattered Thunderstorms 80º 38% SSW 9 mph 95%
2am Scattered Thunderstorms 79º 40% SSW 9 mph 94%
3am Scattered Thunderstorms 80º 40% SSW 8 mph 93%
4am Scattered Thunderstorms 79º 38% SW 8 mph 94%
5am Scattered Thunderstorms 78º 47% SW 7 mph 95%
6am Scattered Thunderstorms 77º 36% SW 6 mph 97%
7am Mostly Cloudy 77º 24% SW 5 mph 97%
8am Mostly Cloudy 78º 24% SW 6 mph 94%
9am Scattered Thunderstorms 80º 45% SW 8 mph 90%
10am Scattered Thunderstorms 81º 45% SW 9 mph 89%
11am Scattered Thunderstorms 82º 38% SW 10 mph 88%
12pm Cloudy 83º 24% SSW 10 mph 86%
1pm Scattered Thunderstorms 83º 51% SSW 11 mph 85%
2pm Scattered Thunderstorms 83º 42% SSW 13 mph 87%
3pm Scattered Thunderstorms 83º 40% SSW 13 mph 87%
4pm Scattered Thunderstorms 82º 45% SSW 12 mph 89%
5pm Mostly Cloudy 82º 24% SSW 11 mph 90%
6pm Scattered Thunderstorms 82º 42% SSW 11 mph 91%
7pm Cloudy 80º 24% SSW 10 mph 94%
8pm Mostly Cloudy 80º 19% SSW 9 mph 94%
9pm Mostly Cloudy 80º 22% SSW 7 mph 96%
10pm Cloudy 80º 14% SSW 7 mph 93%
11pm Mostly Cloudy 80º 18% SSW 7 mph 92%
Tue
Aug 4 		AM Showers
View Hourly 		86º / 77º 60% S 11 mph 87%
12am Showers 80º 48% SSW 7 mph 92%
1am Showers 80º 36% SSW 7 mph 93%
2am Showers 80º 39% SSW 8 mph 93%
3am Showers 80º 43% SSW 6 mph 92%
4am Showers 79º 47% SSW 5 mph 92%
5am Mostly Cloudy 78º 22% SSW 4 mph 94%
6am Showers 78º 38% SW 2 mph 96%
7am Showers 77º 56% SW 1 mph 99%
8am Rain 78º 61% SSW 3 mph 99%
9am Showers 80º 48% SSW 4 mph 94%
Wed
Aug 5 		AM Thundershowers 85º / 78º 76% S 10 mph 86%
Thu
Aug 6 		Scattered Thunderstorms 87º / 79º 68% SSE 9 mph 84%
Fri
Aug 7 		AM Thunderstorms 88º / 78º 44% ESE 11 mph 81%
Sat
Aug 8 		Thunderstorms 86º / 77º 65% ESE 10 mph 83%
Sun
Aug 9 		Thunderstorms 87º / 77º 63% SSE 9 mph 82%

Weather Radar for South Dewees Island, SC See Radar

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* Playback displays weather for the past 6 hours.

NOAA Weather Marine Forecast for South Dewees Island, SC

Today
High : 85ºF
SSW wind 12 to 15 kt increasing to 18 to 21 kt in the afternoon. Winds could gust as high as 27 kt. Showers and possibly a thunderstorm, mainly before 2pm, then showers and thunderstorms likely after 2pm. Seas 3 to 4 ft.
Tonight
Low : 80ºF
SSW wind 18 to 21 kt decreasing to 15 to 18 kt after midnight. Showers and thunderstorms before midnight, then showers and possibly a thunderstorm, mainly after midnight. Seas 4 to 5 ft.
Monday
High : 84ºF
SW wind 13 to 18 kt, with gusts as high as 24 kt. Showers and thunderstorms before 2pm, then showers likely and possibly a thunderstorm between 2pm and 3pm, then a chance of showers and thunderstorms after 3pm. Seas around 4 ft.
Monday Night
Low : 79ºF
SSW wind 10 to 14 kt, with gusts as high as 20 kt. Showers and possibly a thunderstorm. Seas around 3 ft.
Tuesday
High : 84ºF
S wind 6 to 9 kt increasing to 9 to 12 kt in the afternoon. Showers and possibly a thunderstorm, mainly before 2pm, then a slight chance of showers and thunderstorms after 2pm. Seas 2 to 3 ft.
Tuesday Night
Low : 81ºF
S wind 9 to 11 kt. A slight chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 2am. Seas around 3 ft.
Wednesday
High : 84ºF
S wind 6 to 11 kt. Showers likely and possibly a thunderstorm before 8am, then a chance of showers and thunderstorms between 8am and 2pm. Seas around 2 ft.
Wednesday Night
Low : 80ºF
S wind 7 to 9 kt. A chance of showers and thunderstorms, mainly after 2am. Seas around 2 ft.
Thursday
High : 85ºF
Variable winds less than 5 kt becoming SSE 5 to 9 kt in the afternoon. A chance of showers and thunderstorms, mainly before 2pm. Seas around 2 ft.

NOAA Buoy Data Near South Dewees Island, SC See Map

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    Wind Speed Forecast for South Dewees Island, SC

    SundayMondayTuesday
    Wind Speed (MPH) 81717109691311782
    2pm6pm10pm2am6am10am2pm6pm10pm2am6am10am
    MPH 81717109691311782
    DIR SWSSWSSWSSWSSWSWSWSSWSSWSSWSSWSW

    Current Weather Conditions In South Dewees Island, SC

    As Of: 23 minutes ago

    • 79ºF
    • 88ºF
    • 8mph
    • 0º (SW)
    • 8mph
    • Thunderstorms
    • 6mi
    • 29.86"
    • 96%
    • 0ºF

    The weather right now in South Dewees Island, SC is Thunderstorms. The current temperature is 79°F, and the expected high and low for today, Sunday, August 2, 2026, are 85° high temperature and 76°F low temperature. The wind is currently blowing at 8 miles per hour, and coming from the Southwest. The wind is gusting to 8 mph. With the wind and the atmosphere the temperature feels like 88° Fahrenheit. Expected precipitation is 97 percent, with current humidity at 96 percent, and air pressure at 29.86 in. Visibility is 6 nautical miles. There are 3 current weather alert(s).

    Weather Alerts
    Special Marine Warning - 9:32am Sun Aug 2 2026

    The National Weather Service in Charleston has issued a

    * Special Marine Warning for...
    Waters from South Santee River SC to Savannah GA out 20 NM...
    Charleston Harbor...

    * Until 1130 AM EDT.

    * At 932 AM EDT, a severe thunderstorm capable of producing
    waterspouts was located near Fripp Island Reef, moving northeast at
    20 knots.

    HAZARD...Waterspouts and wind gusts to 34 knots.

    SOURCE...Radar indicated.

    IMPACT...Waterspouts can easily overturn boats and create locally
    hazardous seas. Small craft could be damaged in briefly
    higher winds and suddenly higher waves.

    * Locations impacted include...
    Charleston Nearshore Reef, Joe Shuford Reef, Charleston Sixty, Air
    Force Reef, Charleston Coastal Anglers, Rattlesnake Shoal, Capers
    Reef, Charleston Harbor Entrance, Lowcountry Anglers, Capers Island
    Buoy, Bull Breakers, Kiawah Reef, Bulls Bay, N. Edisto Nearshore
    Reef and Jimmy Leland Tug.

    PRECAUTIONARY / PREPAREDNESS ACTIONS:

    Move to safe harbor until hazardous weather passes.

    Thunderstorms can produce sudden waterspouts. Waterspouts can easily
    overturn boats and create locally hazardous seas. Seek safe harbor
    immediately.

    &&

    WATERSPOUT...POSSIBLE; MAX HAIL SIZE...0.00 IN; MAX WIND GUST...34 KTS

    Rip Current Statement - 2:10am Sun Aug 2 2026

    ...HIGH RIP CURRENT RISK REMAINS IN EFFECT FROM 8 AM EDT THIS MORNING THROUGH THIS EVENING...

    WHAT: Dangerous rip currents expected.

    WHERE: Charleston County.

    WHEN: From 8 AM EDT this morning through this evening.

    IMPACTS: Rip currents can sweep even the best swimmers away
    from shore into deeper water.

    PRECAUTIONARY / PREPAREDNESS ACTIONS:

    Swim near a lifeguard. If caught in a rip current, relax and
    float. Don't swim against the current. If able, swim in a
    direction following the shoreline. If unable to escape, face the
    shore and call or wave for help.

    &&

    Small Craft Advisory - 2:10am Sun Aug 2 2026

    ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM NOON TODAY TO 2 AM EDT TUESDAY...

    WHAT: Southwest winds 20 to 25 kt with gusts up to 30 kt and
    seas 4 to 7 ft expected.

    WHERE: South Santee River to Edisto Beach out 20 NM.

    WHEN: From noon today to 2 AM EDT Tuesday.

    IMPACTS: Conditions will be hazardous to small craft.

    PRECAUTIONARY / PREPAREDNESS ACTIONS:

    Inexperienced mariners, especially those operating smaller
    vessels, should avoid navigating in hazardous conditions.

    &&