Tides Today & Tomorrow in Fort Sumter, SC

TIDE TIMES for Wednesday, August 19, 2026
The tide is currently falling in Fort Sumter, SC.
Next low tide : in 1h 52m at 7:23 am (0.7 ft)
Next high tide : 2:07 pm (5.3 ft)
Sunset today : 8:00 pm
Sunrise tomorrow : 6:45 am
Moon phase : First Quarter (46% illuminated)
Tide Station Location : Station #8665728
Common Questions About Tides

Fort Sumter, SC Tides - Oct 1997

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Wed8:305.88:385.82:130.72:340.77:137:04New Moon1Wed
2Thu9:075.89:135.72:470.73:130.77:147:03New Moon2Thu
3Fri9:425.89:475.53:200.73:510.87:157:01New Moon3Fri
4Sat10:145.810:205.43:530.74:290.97:157:00Waxing Crescent4Sat
5Sun10:465.710:555.24:280.85:091.07:166:59Waxing Crescent5Sun
6Mon11:225.711:355.25:060.85:531.17:176:57Waxing Crescent6Mon
7Tue12:065.75:490.86:431.27:176:56Waxing Crescent7Tue
8Wed12:245.11:015.76:410.97:401.27:186:55First Quarter8Wed
9Thu1:225.12:055.87:410.98:411.17:196:54First Quarter9Thu
10Fri2:275.23:125.98:470.89:430.97:206:52First Quarter10Fri
11Sat3:355.44:196.09:540.610:430.67:206:51Waxing Gibbous11Sat
12Sun4:435.75:236.211:000.411:400.27:216:50Waxing Gibbous12Sun
13Mon5:476.16:226.412:030.17:226:49Waxing Gibbous13Mon
14Tue6:466.47:176.512:35-0.11:02-0.17:236:47Full Moon14Tue
15Wed7:416.78:106.51:27-0.41:59-0.37:236:46Full Moon15Wed
16Thu8:356.99:026.42:18-0.52:53-0.37:246:45Full Moon16Thu
17Fri9:286.99:546.23:08-0.53:46-0.27:256:44Full Moon17Fri
18Sat10:206.810:476.03:57-0.44:380.07:266:43Waning Gibbous18Sat
19Sun11:136.611:405.74:46-0.15:300.37:266:42Waning Gibbous19Sun
20Mon12:066.35:350.26:240.67:276:40Waning Gibbous20Mon
21Tue12:345.41:006.06:280.57:200.97:286:39Third Quarter21Tue
22Wed1:305.21:555.87:240.88:171.17:296:38Third Quarter22Wed
23Thu2:265.12:485.68:221.09:131.27:296:37Third Quarter23Thu
24Fri3:205.13:405.59:201.110:051.27:306:36Third Quarter24Fri
25Sat4:145.14:315.410:151.110:531.17:316:35Waning Crescent25Sat
26Sun4:065.34:205.510:081.110:381.06:325:34Waning Crescent26Sun
27Mon4:555.55:065.510:570.911:200.96:335:33Waning Crescent27Mon
28Tue5:405.65:495.511:430.811:580.76:345:32Waning Crescent28Tue
29Wed6:225.86:295.612:260.76:345:31New Moon29Wed
30Thu7:015.97:075.512:350.61:080.66:355:30New Moon30Thu
31Fri7:385.97:445.41:110.61:490.66:365:29New Moon31Fri
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 10:45 am — 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 neap phase. Tonight's moon is 46% 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 minimum.

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 First Quarter (46% illuminated). This places Fort Sumter, SC in a neap tide cycle, so tidal ranges are near their weekly minimum 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