Tides Today & Tomorrow in Fort Sumter, SC

TIDE TIMES for Friday, July 31, 2026
The tide is currently rising in Fort Sumter, SC.
Next low tide : 3:44 pm (0.3 ft)
Next high tide : in 1h 49m at 9:43 am (4.7 ft)
Sunset today : 8:18 pm
Sunrise tomorrow : 6:32 am
Moon phase : Waning Gibbous (96% illuminated)
Tide Station Location : Station #8665728
Common Questions About Tides

Fort Sumter, SC Tides - Oct 2089

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sat6:076.06:296.512:120.07:147:03Waning Crescent1Sat
2Sun7:036.47:226.512:460.01:10-0.27:147:02New Moon2Sun
3Mon7:576.68:136.51:37-0.22:04-0.37:157:00New Moon3Mon
4Tue8:486.79:026.32:26-0.32:57-0.27:166:59New Moon4Tue
5Wed9:386.79:506.13:13-0.23:48-0.17:176:58New Moon5Wed
6Thu10:286.610:385.93:590.04:370.27:176:56Waxing Crescent6Thu
7Fri11:166.411:255.64:440.25:250.57:186:55Waxing Crescent7Fri
8Sat12:056.15:290.56:150.87:196:54Waxing Crescent8Sat
9Sun12:145.312:555.86:160.87:071.17:196:53First Quarter9Sun
10Mon1:055.11:475.67:071.18:011.37:206:51First Quarter10Mon
11Tue1:585.02:395.58:011.38:541.47:216:50First Quarter11Tue
12Wed2:515.03:305.48:581.49:451.47:226:49First Quarter12Wed
13Thu3:455.04:215.49:531.410:341.37:226:48Waxing Gibbous13Thu
14Fri4:385.15:125.510:461.311:201.17:236:47Waxing Gibbous14Fri
15Sat5:305.35:595.611:371.17:246:45Waxing Gibbous15Sat
16Sun6:175.56:435.612:040.912:241.07:256:44Waxing Gibbous16Sun
17Mon7:005.87:245.712:450.81:090.87:256:43Full Moon17Mon
18Tue7:405.98:025.71:240.61:520.77:266:42Full Moon18Tue
19Wed8:176.18:405.62:030.42:350.67:276:41Full Moon19Wed
20Thu8:546.29:175.52:430.33:180.67:286:40Full Moon20Thu
21Fri9:326.29:575.53:230.34:010.67:286:39Waning Gibbous21Fri
22Sat10:146.210:415.44:060.24:470.67:296:37Waning Gibbous22Sat
23Sun11:016.211:315.34:520.35:350.77:306:36Waning Gibbous23Sun
24Mon11:546.15:420.46:290.87:316:35Waning Gibbous24Mon
25Tue12:295.212:556.06:380.57:290.87:326:34Third Quarter25Tue
26Wed1:355.22:016.07:420.58:320.77:326:33Third Quarter26Wed
27Thu2:435.33:066.08:490.59:340.67:336:32Third Quarter27Thu
28Fri3:505.54:116.09:550.410:330.47:346:31Waning Crescent28Fri
29Sat4:545.85:136.010:590.311:300.17:356:30Waning Crescent29Sat
30Sun5:556.16:106.011:590.17:366:29Waning Crescent30Sun
31Mon6:496.47:026.012:23-0.112:56-0.17:376:28Waning Crescent31Mon
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
Tidal Data Source: (8665728)

Common Questions About Fort Sumter, SC Tides

Show All
What time does the tide turn (slack tide) in Fort Sumter, SC today?

Slack tide in Fort Sumter, SC is approximately 12:43 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 96% 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 Waning Gibbous (96% 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