Tides Today & Tomorrow in Charleston, SC

TIDE TIMES for Friday, August 21, 2026
The tide is currently rising in Charleston, SC.
Next low tide : 10:11 pm (1.4 ft)
Next high tide : in 4h 53m at 3:48 pm (5.4 ft)
Sunset today : 7:58 pm
Sunrise tomorrow : 6:47 am
Moon phase : First Quarter (65% illuminated)
Tide Station Location : Station #8665530
Common Questions About Tides

Charleston, SC Tides - Sep 1932

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Thu8:515.99:076.42:460.13:03-0.16:547:44New Moon1Thu
2Fri9:396.19:536.33:29-0.13:53-0.16:547:43Waxing Crescent2Fri
3Sat10:296.310:406.14:13-0.24:450.06:557:42Waxing Crescent3Sat
4Sun11:226.411:315.84:58-0.25:390.36:567:41Waxing Crescent4Sun
5Mon12:186.45:460.06:370.66:567:39Waxing Crescent5Mon
6Tue12:265.41:206.36:390.27:400.86:577:38First Quarter6Tue
7Wed1:275.22:256.27:390.48:461.06:587:37First Quarter7Wed
8Thu2:325.03:316.18:440.69:511.06:587:35First Quarter8Thu
9Fri3:395.04:376.19:500.610:531.06:597:34Waxing Gibbous9Fri
10Sat4:455.05:396.210:540.611:500.87:007:33Waxing Gibbous10Sat
11Sun5:475.26:326.211:550.67:007:31Waxing Gibbous11Sun
12Mon6:415.47:186.312:410.712:490.57:017:30Waxing Gibbous12Mon
13Tue7:295.68:006.21:280.61:390.57:017:29Full Moon13Tue
14Wed8:135.88:396.12:100.52:250.57:027:27Full Moon14Wed
15Thu8:545.99:165.92:490.53:090.67:037:26Full Moon15Thu
16Fri9:335.99:535.73:260.53:500.87:037:25Full Moon16Fri
17Sat10:115.910:295.54:000.64:291.07:047:23Waning Gibbous17Sat
18Sun10:475.811:065.24:330.85:071.27:057:22Waning Gibbous18Sun
19Mon11:245.711:445.05:061.05:461.57:057:21Waning Gibbous19Mon
20Tue12:035.65:411.16:291.77:067:19Waning Gibbous20Tue
21Wed12:264.812:475.56:211.37:191.97:077:18Third Quarter21Wed
22Thu1:144.61:395.57:091.48:151.97:077:16Third Quarter22Thu
23Fri2:074.62:365.58:061.49:131.97:087:15Third Quarter23Fri
24Sat3:054.63:355.69:061.310:091.77:097:14Third Quarter24Sat
25Sun3:044.83:345.89:071.110:031.46:096:12Waning Crescent25Sun
26Mon4:045.14:306.110:070.910:541.16:106:11Waning Crescent26Mon
27Tue4:595.55:216.311:050.611:420.76:116:10Waning Crescent27Tue
28Wed5:505.96:086.512:000.36:116:08New Moon28Wed
29Thu6:386.36:546.512:280.312:530.16:126:07New Moon29Thu
30Fri7:276.77:416.51:140.01:460.06:136:06New Moon30Fri
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
Tidal Data Source: (8665530)

Common Questions About Charleston, SC Tides

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What time does the tide turn (slack tide) in Charleston, SC today?

Slack tide in Charleston, SC is approximately 6:59 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 Charleston, SC?

Charleston, 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 Charleston, 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 Charleston, SC?

Tide predictions for Charleston, 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 Charleston, SC?

Tide data for Charleston, SC is sourced from NOAA Station #8665530. View the official NOAA station page at https://tidesandcurrents.noaa.gov/stationhome.html?id=8665530.

What is the moon phase in Charleston, SC tonight?

Tonight the moon over Charleston, SC is First Quarter (65% illuminated). This places Charleston, 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