Tides Today & Tomorrow in Fort Sumter, SC

TIDE TIMES for Saturday, August 15, 2026
The tide is currently rising in Fort Sumter, SC.
Next low tide : 4:51 pm (0.0 ft)
Next high tide : in 4h 28m at 10:53 am (5.7 ft)
Sunset today : 8:04 pm
Sunrise tomorrow : 6:43 am
Moon phase : Waxing Crescent (11% illuminated)
Tide Station Location : Station #8665728
Common Questions About Tides

Fort Sumter, SC Tides - Sep 2004

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Wed10:285.910:505.84:130.04:350.26:547:44Waning Gibbous1Wed
2Thu11:145.811:345.54:540.15:230.66:557:42Waning Gibbous2Thu
3Fri12:005.75:350.36:110.96:557:41Waning Gibbous3Fri
4Sat12:175.212:465.66:170.67:031.26:567:40Third Quarter4Sat
5Sun1:044.91:345.47:010.97:571.46:577:38Third Quarter5Sun
6Mon1:534.72:245.37:491.18:531.66:577:37Third Quarter6Mon
7Tue2:444.53:165.38:401.29:481.66:587:36Third Quarter7Tue
8Wed3:384.54:105.39:341.210:411.66:597:34Third Quarter8Wed
9Thu4:344.65:055.410:281.111:311.46:597:33Waning Crescent9Thu
10Fri5:294.75:565.611:211.07:007:32Waning Crescent10Fri
11Sat6:194.96:425.812:171.312:110.87:007:30Waning Crescent11Sat
12Sun7:045.17:235.912:591.112:590.77:017:29Waning Crescent12Sun
13Mon7:465.38:016.01:380.91:440.57:027:28New Moon13Mon
14Tue8:265.58:386.02:160.72:290.47:027:26New Moon14Tue
15Wed9:045.79:155.92:530.53:140.47:037:25New Moon15Wed
16Thu9:445.99:535.83:310.43:590.47:047:24Waxing Crescent16Thu
17Fri10:256.010:355.64:100.34:460.57:047:22Waxing Crescent17Fri
18Sat11:116.111:215.44:510.35:370.77:057:21Waxing Crescent18Sat
19Sun12:036.15:370.46:320.97:067:20Waxing Crescent19Sun
20Mon12:155.21:056.06:300.57:351.07:067:18First Quarter20Mon
21Tue1:175.02:136.07:310.68:421.17:077:17First Quarter21Tue
22Wed2:254.93:246.08:380.79:481.07:087:16First Quarter22Wed
23Thu3:375.04:336.19:470.710:500.97:087:14Waxing Gibbous23Thu
24Fri4:475.15:376.210:550.511:490.77:097:13Waxing Gibbous24Fri
25Sat5:525.46:346.311:580.47:097:11Waxing Gibbous25Sat
26Sun6:495.77:246.412:420.412:550.27:107:10Waxing Gibbous26Sun
27Mon7:406.08:096.31:300.21:490.27:117:09Full Moon27Mon
28Tue8:286.28:536.22:160.12:390.27:117:07Full Moon28Tue
29Wed9:136.29:355.92:580.13:270.37:127:06Full Moon29Wed
30Thu9:566.210:165.73:390.24:120.67:137:05Waning Gibbous30Thu
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
Tidal Data Source: (8665728)

Common Questions About Fort Sumter, SC Tides

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What time does the tide turn (slack tide) in Fort Sumter, SC today?

Slack tide in Fort Sumter, SC is approximately 1:52 pm — midway between the next high and low tide, when tidal current is weakest. This is the preferred window for boat crossings, underwater visibility, and fishing in areas with strong currents.

Is this week a spring tide or neap tide in Fort Sumter, SC?

Fort Sumter, SC is currently in a spring phase. Tonight's moon is 11% illuminated. Spring tides (largest swings) occur near new and full moons; neap tides (smallest swings) occur near first and third quarter moons. Tidal ranges this week are near their weekly maximum.

What datum are Fort Sumter, SC tide heights measured from?

Tide heights on this page are measured from Mean Lower Low Water (MLLW), the U.S. NOAA standard. A height of 0 ft represents the 19-year average of each day's lower low tide. Negative values indicate a "minus tide" — water levels below that long-term reference.

What factors can affect the tide predictions for Fort Sumter, SC?

Tide predictions for Fort Sumter, SC come from NOAA's harmonic analysis and are typically accurate within about ±10 minutes on timing and ±0.5 ft on height. Actual water levels can deviate further due to sustained winds, atmospheric pressure changes, river flow, and storm surge. During major weather events, be sure to check US Harbors weather pages for factors that could impact tidal predictions.

Which NOAA station provides tide data for Fort Sumter, SC?

Tide data for Fort Sumter, SC is sourced from NOAA Station #8665728. View the official NOAA station page at https://tidesandcurrents.noaa.gov/stationhome.html?id=8665728.

What is the moon phase in Fort Sumter, SC tonight?

Tonight the moon over Fort Sumter, SC is Waxing Crescent (11% illuminated). This places Fort Sumter, SC in a spring tide cycle, so tidal ranges are near their weekly maximum this week.

US Harbors Tidal Data

The data in our tide charts, tide tables, and tide graphs is provided by NOAA and others. These predictions are derived mathematically from numerous inputs, including data from historical tide stations and nearby locations where sensors are actively recording. As shown in the tide graph at the top of this page, “Predicted” tides (blue) are what forecasting models expect to happen. “Observed” tides (red) are those recorded by local sensors in real time, overlaid on the predictions for direct comparison. We display Observed water levels for a select group of harbors including Portland, Maine, where a physical sensor monitors water levels in real time.

LEARN MORE ABOUT OUR TIDE DATA