Tides Today & Tomorrow in Fort Sumter, SC

TIDE TIMES for Friday, August 21, 2026
The tide is currently rising in Fort Sumter, SC.
Next low tide : 10:10 pm (1.4 ft)
Next high tide : in 1h 34m at 3:50 pm (5.2 ft)
Sunset today : 7:58 pm
Sunrise tomorrow : 6:47 am
Moon phase : First Quarter (65% illuminated)
Tide Station Location : Station #8665728
Common Questions About Tides

Fort Sumter, SC Tides - May 1994

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sun1:195.71:444.87:320.17:420.46:328:00Third Quarter1Sun
2Mon2:175.42:434.88:300.28:460.66:318:01Third Quarter2Mon
3Tue3:135.13:404.99:250.39:480.76:308:02Third Quarter3Tue
4Wed4:065.04:355.010:170.310:460.76:298:03Waning Crescent4Wed
5Thu4:584.95:275.211:050.311:400.66:288:03Waning Crescent5Thu
6Fri5:474.86:135.311:500.26:278:04Waning Crescent6Fri
7Sat6:324.86:565.512:290.512:320.16:268:05Waning Crescent7Sat
8Sun7:144.87:355.61:140.41:120.16:258:06New Moon8Sun
9Mon7:554.88:135.71:560.31:500.16:248:06New Moon9Mon
10Tue8:344.88:495.72:360.32:270.16:248:07New Moon10Tue
11Wed9:134.79:235.63:140.33:030.16:238:08New Moon11Wed
12Thu9:514.69:565.63:500.33:400.26:228:09New Moon12Thu
13Fri10:264.410:295.54:260.44:170.36:218:09Waxing Crescent13Fri
14Sat11:024.411:055.45:020.44:570.36:218:10Waxing Crescent14Sat
15Sun11:414.411:475.35:420.55:420.46:208:11Waxing Crescent15Sun
16Mon12:284.46:250.56:330.56:198:11Waxing Crescent16Mon
17Tue12:365.31:234.67:150.47:330.56:198:12First Quarter17Tue
18Wed1:315.22:244.88:100.38:370.56:188:13First Quarter18Wed
19Thu2:325.23:265.19:070.19:430.46:178:14First Quarter19Thu
20Fri3:345.14:315.510:05-0.110:490.16:178:14Waxing Gibbous20Fri
21Sat4:395.25:345.811:03-0.411:52-0.16:168:15Waxing Gibbous21Sat
22Sun5:435.26:336.212:01-0.66:168:16Waxing Gibbous22Sun
23Mon6:445.37:296.512:52-0.412:56-0.86:158:16Full Moon23Mon
24Tue7:415.38:236.61:49-0.61:51-0.96:158:17Full Moon24Tue
25Wed8:385.39:186.62:44-0.72:45-0.96:148:18Full Moon25Wed
26Thu9:355.210:136.43:37-0.83:38-0.76:148:18Full Moon26Thu
27Fri10:325.111:076.24:29-0.74:30-0.56:138:19Waning Gibbous27Fri
28Sat11:285.05:20-0.55:23-0.26:138:19Waning Gibbous28Sat
29Sun12:005.912:244.96:11-0.36:180.16:138:20Waning Gibbous29Sun
30Mon12:525.51:204.97:04-0.17:170.56:128:21Third Quarter30Mon
31Tue1:445.22:154.87:560.18:170.76:128:21Third Quarter31Tue
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 7:00 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 transitional phase. Tonight's moon is 65% 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 shifting between spring and neap.

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 (65% illuminated). This places Fort Sumter, SC in a transitional tide cycle, so tidal ranges are shifting between spring and neap 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