Tides Today & Tomorrow in Fort Sumter, SC

TIDE TIMES for Tuesday, July 21, 2026
The tide is currently rising in Fort Sumter, SC.
Next low tide : 8:58 pm (0.8 ft)
Next high tide : in 3h 24m at 2:50 pm (5.2 ft)
Sunset today : 8:25 pm
Sunrise tomorrow : 6:26 am
Moon phase : First Quarter (52% illuminated)
Tide Station Location : Station #8665728
Common Questions About Tides

Fort Sumter, SC Tides - Dec 2077

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Wed8:466.49:095.12:18-0.63:10-0.27:045:13Waning Gibbous1Wed
2Thu9:356.110:004.93:06-0.43:590.17:055:13Waning Gibbous2Thu
3Fri10:245.810:524.73:54-0.14:470.37:065:13Waning Gibbous3Fri
4Sat11:135.511:444.54:430.25:360.67:065:13Waning Gibbous4Sat
5Sun12:035.25:350.56:280.87:075:13Third Quarter5Sun
6Mon12:394.412:534.96:300.87:190.97:085:13Third Quarter6Mon
7Tue1:334.41:434.77:290.98:080.97:095:13Third Quarter7Tue
8Wed2:264.52:324.68:261.08:550.87:095:13Third Quarter8Wed
9Thu3:184.63:224.59:220.99:390.77:105:13Waning Crescent9Thu
10Fri4:094.84:134.510:150.810:230.67:115:13Waning Crescent10Fri
11Sat4:585.05:014.511:060.711:050.47:125:13Waning Crescent11Sat
12Sun5:425.25:464.511:530.511:460.37:125:14Waning Crescent12Sun
13Mon6:245.46:294.512:370.47:135:14New Moon13Mon
14Tue7:035.57:094.512:260.11:200.27:145:14New Moon14Tue
15Wed7:425.67:484.51:070.02:020.17:145:15New Moon15Wed
16Thu8:215.68:284.51:49-0.12:440.17:155:15New Moon16Thu
17Fri9:015.69:114.52:32-0.23:270.17:155:15Waxing Crescent17Fri
18Sat9:445.59:574.53:17-0.24:110.17:165:16Waxing Crescent18Sat
19Sun10:315.510:494.54:05-0.14:580.07:175:16Waxing Crescent19Sun
20Mon11:235.311:474.64:580.05:490.07:175:17Waxing Crescent20Mon
21Tue12:205.25:580.16:44-0.17:185:17First Quarter21Tue
22Wed12:514.71:205.07:040.27:41-0.27:185:18First Quarter22Wed
23Thu1:555.02:214.98:130.28:39-0.37:185:18First Quarter23Thu
24Fri3:005.23:244.89:200.19:36-0.57:195:19Waxing Gibbous24Fri
25Sat4:045.54:264.810:25-0.110:32-0.67:195:19Waxing Gibbous25Sat
26Sun5:045.75:254.811:25-0.211:27-0.87:205:20Waxing Gibbous26Sun
27Mon6:005.96:194.812:21-0.47:205:21Full Moon27Mon
28Tue6:516.07:114.812:19-0.81:14-0.47:205:21Full Moon28Tue
29Wed7:406.08:004.71:10-0.82:03-0.47:215:22Full Moon29Wed
30Thu8:285.88:494.71:59-0.82:50-0.47:215:23Full Moon30Thu
31Fri9:135.69:384.52:46-0.63:34-0.27:215:23Waning Gibbous31Fri
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 5:54 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 neap phase. Tonight's moon is 52% 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 (52% 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