Tides Today & Tomorrow in Fort Sumter, SC

TIDE TIMES for Thursday, July 30, 2026
The tide is currently rising in Fort Sumter, SC.
Next low tide : 3:03 pm (0.3 ft)
Next high tide : in 37m at 9:05 am (4.6 ft)
Sunset today : 8:19 pm
Sunrise tomorrow : 6:32 am
Moon phase : Full Moon (99% illuminated)
Tide Station Location : Station #8665728
Common Questions About Tides

Fort Sumter, SC Tides - Aug 2087

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Fri10:465.310:545.54:29-0.14:420.06:338:17Waxing Crescent1Fri
2Sat11:325.211:355.35:100.05:280.36:348:17Waxing Crescent2Sat
3Sun12:185.15:490.26:140.66:358:16Waxing Crescent3Sun
4Mon12:175.01:045.16:290.47:040.96:358:15First Quarter4Mon
5Tue1:014.81:515.07:100.67:561.16:368:14First Quarter5Tue
6Wed1:474.62:405.07:550.78:501.26:378:13First Quarter6Wed
7Thu2:374.53:305.08:430.89:431.26:388:12First Quarter7Thu
8Fri3:284.44:225.19:330.810:361.16:388:11Waxing Gibbous8Fri
9Sat4:224.45:155.310:250.711:281.06:398:10Waxing Gibbous9Sat
10Sun5:174.56:055.511:180.66:408:09Waxing Gibbous10Sun
11Mon6:094.76:515.612:160.812:090.46:408:08Waxing Gibbous11Mon
12Tue6:574.97:335.81:020.612:590.26:418:07Full Moon12Tue
13Wed7:425.18:155.91:450.31:470.16:428:06Full Moon13Wed
14Thu8:265.38:556.02:280.12:350.06:428:05Full Moon14Thu
15Fri9:115.59:375.93:11-0.13:23-0.16:438:04Full Moon15Fri
16Sat9:575.610:215.83:54-0.24:120.06:448:03Waning Gibbous16Sat
17Sun10:465.811:085.74:37-0.35:020.16:448:02Waning Gibbous17Sun
18Mon11:385.85:24-0.35:560.36:458:01Waning Gibbous18Mon
19Tue12:005.512:355.96:14-0.26:550.56:468:00Third Quarter19Tue
20Wed12:575.31:375.97:09-0.18:000.66:467:58Third Quarter20Wed
21Thu1:595.12:415.98:090.09:050.76:477:57Third Quarter21Thu
22Fri3:045.03:465.99:110.010:100.66:487:56Third Quarter22Fri
23Sat4:105.04:516.010:140.011:120.56:487:55Waning Crescent23Sat
24Sun5:155.15:526.111:160.06:497:54Waning Crescent24Sun
25Mon6:155.36:456.112:090.412:14-0.16:507:53Waning Crescent25Mon
26Tue7:095.57:346.21:010.21:09-0.16:507:51New Moon26Tue
27Wed7:595.68:186.11:490.12:00-0.16:517:50New Moon27Wed
28Thu8:465.79:006.02:340.12:480.06:527:49New Moon28Thu
29Fri9:315.79:405.83:160.13:330.26:527:48New Moon29Fri
30Sat10:135.710:195.63:550.24:160.46:537:46Waxing Crescent30Sat
31Sun10:555.610:585.44:320.44:580.66:537:45Waxing Crescent31Sun
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 12:04 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 99% 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 Full Moon (99% 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