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 2h 08m 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 - Jul 2004

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Thu7:194.88:066.41:36-0.31:29-0.76:158:31Full Moon1Thu
2Fri8:204.89:046.42:32-0.42:26-0.76:158:31Full Moon2Fri
3Sat9:204.910:026.43:26-0.53:23-0.76:168:31Full Moon3Sat
4Sun10:204.910:576.24:19-0.54:19-0.56:168:31Waning Gibbous4Sun
5Mon11:195.011:515.95:10-0.55:14-0.36:178:31Waning Gibbous5Mon
6Tue12:175.06:01-0.46:110.06:178:31Waning Gibbous6Tue
7Wed12:435.61:145.06:52-0.27:110.36:188:30Third Quarter7Wed
8Thu1:345.22:095.07:43-0.18:120.66:188:30Third Quarter8Thu
9Fri2:244.93:015.18:330.09:120.76:198:30Third Quarter9Fri
10Sat3:124.63:515.19:210.110:090.86:198:30Third Quarter10Sat
11Sun4:014.44:415.210:070.211:030.86:208:29Waning Crescent11Sun
12Mon4:524.35:295.310:540.311:550.86:208:29Waning Crescent12Mon
13Tue5:424.36:165.411:400.36:218:29Waning Crescent13Tue
14Wed6:314.36:595.512:420.712:250.36:228:28Waning Crescent14Wed
15Thu7:174.37:415.51:270.61:090.36:228:28New Moon15Thu
16Fri8:014.38:215.52:090.51:510.26:238:27New Moon16Fri
17Sat8:434.39:005.52:490.52:320.26:238:27New Moon17Sat
18Sun9:244.39:375.53:260.53:130.26:248:27New Moon18Sun
19Mon10:034.410:125.44:010.53:530.36:258:26Waxing Crescent19Mon
20Tue10:414.410:465.34:350.44:340.36:258:25Waxing Crescent20Tue
21Wed11:184.511:225.35:100.45:180.46:268:25Waxing Crescent21Wed
22Thu11:594.75:480.36:060.56:278:24Waxing Crescent22Thu
23Fri12:035.112:464.96:300.27:010.66:278:24First Quarter23Fri
24Sat12:505.01:405.17:170.18:020.76:288:23First Quarter24Sat
25Sun1:444.92:385.38:100.19:070.76:298:22First Quarter25Sun
26Mon2:424.73:415.69:070.010:130.66:298:22First Quarter26Mon
27Tue3:464.64:485.810:08-0.111:180.46:308:21Waxing Gibbous27Tue
28Wed4:554.65:556.011:12-0.26:318:20Waxing Gibbous28Wed
29Thu6:044.76:576.312:210.212:15-0.46:318:20Waxing Gibbous29Thu
30Fri7:074.97:556.41:190.01:16-0.56:328:19Full Moon30Fri
31Sat8:075.08:516.42:14-0.22:14-0.66:338:18Full Moon31Sat
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