Fort Sumter, SC Weather Forecast and Current Conditions

Day Sky High / Low Precip Wind Humidity
Mon
Jul 13 		Showers Late
Close Hourly 		-º / 75º 45% E 4 mph 92%
9pm Scattered Thunderstorms 81º 55% S 3 mph 85%
10pm Scattered Thunderstorms 81º 50% SE 3 mph 85%
11pm Few Showers 80º 31% E 3 mph 88%
Tue
Jul 14 		Thunderstorms
View Hourly 		84º / 75º 65% ENE 7 mph 87%
12am Few Showers 79º 34% E 4 mph 91%
1am Cloudy 78º 17% ENE 2 mph 94%
2am Cloudy 77º 18% ENE 2 mph 95%
3am Isolated Thunderstorms 77º 34% ENE 2 mph 94%
4am Showers 76º 45% ENE 2 mph 97%
5am Showers 76º 46% ENE 2 mph 98%
6am Scattered Thunderstorms 76º 38% ENE 2 mph 98%
7am Scattered Thunderstorms 76º 46% ENE 2 mph 99%
8am Thunderstorms 77º 66% NE 3 mph 97%
9am Light Rain 79º 64% NE 4 mph 93%
10am Showers 81º 42% NE 5 mph 88%
11am Few Showers 82º 33% NE 5 mph 85%
12pm Few Showers 83º 33% ENE 5 mph 83%
1pm Cloudy 83º 24% ENE 6 mph 82%
2pm Cloudy 84º 20% ENE 6 mph 81%
3pm Scattered Thunderstorms 83º 54% E 7 mph 81%
4pm Scattered Thunderstorms 82º 53% ENE 6 mph 82%
5pm Few Showers 82º 34% ENE 6 mph 84%
6pm Mostly Cloudy 82º 24% ENE 7 mph 84%
7pm Cloudy 82º 19% ENE 5 mph 84%
8pm Cloudy 81º 15% ENE 4 mph 89%
9pm Cloudy 80º 24% ENE 3 mph 92%
10pm Mostly Cloudy 79º 20% NE 2 mph 92%
11pm Mostly Cloudy 79º 24% NE 2 mph 92%
Wed
Jul 15 		PM Thunderstorms
View Hourly 		88º / 76º 45% ENE 6 mph 79%
12am Mostly Cloudy 78º 24% NE 1 mph 94%
1am Mostly Cloudy 78º 18% NNE 0 mph 96%
2am Mostly Cloudy 77º 21% NNE 1 mph 97%
3am Cloudy 77º 23% NNE 0 mph 98%
4am Cloudy 76º 12% NNE 1 mph 97%
5am Cloudy 76º 11% NNE 2 mph 97%
6am Cloudy 76º 11% NNE 2 mph 98%
7am Mostly Cloudy 76º 10% NNE 2 mph 99%
8am Mostly Cloudy 79º 10% N 3 mph 94%
9am Mostly Cloudy 81º 17% NNE 4 mph 87%
10am Mostly Cloudy 83º 15% NNE 4 mph 81%
11am Partly Cloudy 85º 17% NNE 4 mph 74%
12pm Mostly Cloudy 86º 23% NE 5 mph 73%
1pm Cloudy 87º 20% E 5 mph 73%
2pm Scattered Thunderstorms 87º 38% ESE 6 mph 73%
3pm Scattered Thunderstorms 86º 46% ESE 5 mph 73%
4pm Mostly Cloudy 85º 24% SE 6 mph 74%
5pm Mostly Cloudy 85º 24% SE 5 mph 75%
6pm Mostly Cloudy 84º 15% SE 5 mph 77%
7pm Partly Cloudy 84º 7% SSE 4 mph 79%
8pm Partly Cloudy 83º 6% SSE 3 mph 82%
Thu
Jul 16 		PM Thunderstorms 91º / 78º 39% SW 8 mph 75%
Fri
Jul 17 		Mostly Sunny 92º / 79º 19% SSW 10 mph 73%
Sat
Jul 18 		Mostly Sunny 91º / 79º 24% SSW 13 mph 73%
Sun
Jul 19 		PM Thunderstorms 91º / 78º 49% SW 14 mph 73%
Mon
Jul 20 		Thunderstorms 90º / 77º 66% SSW 12 mph 75%

Weather Radar for Fort Sumter, SC See Radar

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* Playback displays weather for the past 6 hours.

NOAA Weather Marine Forecast for Fort Sumter, SC

Tonight
Low : 78ºF
SW wind around 6 kt becoming variable and less than 5 kt in the evening. Showers and thunderstorms likely before 2am, then showers likely and possibly a thunderstorm between 2am and 4am, then a chance of showers and thunderstorms after 4am. Seas around 2 ft.
Tuesday
High : 82ºF
N wind 5 to 8 kt becoming SE in the afternoon. A chance of showers and thunderstorms before 10am, then showers likely and possibly a thunderstorm between 10am and 1pm, then a chance of showers and thunderstorms after 1pm. Seas around 2 ft.
Tuesday Night
Low : 79ºF
E wind around 6 kt becoming variable and less than 5 kt in the evening. A chance of showers and thunderstorms before 2am, then a slight chance of showers between 2am and 5am. Seas around 2 ft.
Wednesday
High : 83ºF
NNW wind 5 to 7 kt becoming SSW in the afternoon. A chance of showers and thunderstorms. Seas around 2 ft.
Wednesday Night
Low : 80ºF
SW wind around 6 kt becoming variable and less than 5 kt. Partly cloudy. Seas 1 to 2 ft.
Thursday
High : 85ºF
Variable winds less than 5 kt becoming SSW 5 to 10 kt in the afternoon. Sunny. Seas around 1 ft.
Thursday Night
Low : 81ºF
WSW wind 7 to 10 kt. Mostly clear. Seas around 2 ft.
Friday
High : 87ºF
Variable winds less than 5 kt becoming S 7 to 12 kt in the afternoon. Sunny. Seas 1 to 2 ft.
Friday Night
Low : 82ºF
SW wind 8 to 11 kt. Mostly clear. Seas around 2 ft.

NOAA Buoy Data Near Fort Sumter, SC See Map

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    Wind Speed Forecast for Fort Sumter, SC

    TuesdayWednesday
    Wind Speed (MPH) 322466302455
    1am5am9am1pm5pm9pm1am5am9am1pm5pm9pm
    MPH 322466302455
    DIR SENEENENEENEENEENENNENNENNEESE

    Current Weather Conditions In Fort Sumter, SC

    As Of: 20 minutes ago

    • 81ºF
    • 90ºF
    • 3mph
    • 0º (S)
    • 3mph
    • Scattered Thunderstorms
    • 7mi
    • 30.03"
    • 85%
    • 0ºF

    The weather right now in Fort Sumter, SC is Scattered Thunderstorms. The current temperature is 81°F, and the expected high and low for today, Monday, July 13, 2026, are -° high temperature and 75°F low temperature. The wind is currently blowing at 3 miles per hour, and coming from the South. The wind is gusting to 3 mph. With the wind and the atmosphere the temperature feels like 90° Fahrenheit. Expected precipitation is 55 percent, with current humidity at 85 percent, and air pressure at 30.03 in. Visibility is 7 nautical miles. There are 1 current weather alert(s).

    Weather Alerts
    Coastal Flood Advisory - 2:24pm Mon Jul 13 2026

    ...COASTAL FLOOD ADVISORY IN EFFECT FROM 6 PM TO 10 PM EDT THIS EVENING...

    WHAT: Up to one half foot of inundation above ground level
    expected along shorelines and tidal waterways (7.2 to 7.4 feet
    Mean Lower Low Water at Charleston).

    WHERE: Coastal Colleton and Charleston Counties.

    WHEN: From 6 PM to 10 PM EDT this evening.

    IMPACTS: This could result in some roads becoming impassable.

    ADDITIONAL DETAILS: High tide will occur around 8 PM this
    evening at Charleston. Saltwater inundation will be possible 1
    to 2 hours before and after high tide.

    PRECAUTIONARY / PREPAREDNESS ACTIONS:

    If travel is required, allow extra time as some roads may be
    closed. Do not drive around barricades or through water of
    unknown depth. Take the necessary actions to protect flood-prone
    property.

    Visit water.weather.gov for additional water level and flood
    impact information.

    &&

    Time of high total tides are approximate to the nearest hour.

    Charleston Harbor SC
    MLLW Categories - Minor 7.0 ft, Moderate 7.5 ft, Major 8.0 ft
    MHHW Categories - Minor 1.2 ft, Moderate 1.7 ft, Major 2.2 ft

    Total Total Departure
    Day/Time Tide Tide from Norm Waves Flood
    ft MLLW ft MHHW ft ft Impact
    -------- --------- --------- --------- ------- --------
    13/08 PM 7.3 1.5 0.7 N/A Minor
    14/08 AM 5.6 -0.2 0.6 N/A None
    14/09 PM 7.4 1.6 0.8 N/A Minor
    15/09 AM 5.8 0.0 0.7 N/A None
    15/10 PM 7.0 1.2 0.5 N/A Minor

    &&