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 5h 29m 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 - Oct 1932

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sat8:176.98:306.32:00-0.22:380.06:136:04New Moon1Sat
2Sun9:097.09:216.02:46-0.23:310.16:146:03Waxing Crescent2Sun
3Mon10:046.910:165.73:35-0.14:250.46:156:02Waxing Crescent3Mon
4Tue11:036.711:155.54:250.15:230.76:156:00Waxing Crescent4Tue
5Wed12:076.55:210.46:260.96:165:59First Quarter5Wed
6Thu12:195.21:136.36:240.77:311.16:175:58First Quarter6Thu
7Fri1:265.12:186.27:320.98:341.16:175:57First Quarter7Fri
8Sat2:315.23:206.18:391.09:331.16:185:55Waxing Gibbous8Sat
9Sun3:345.34:176.19:421.010:261.06:195:54Waxing Gibbous9Sun
10Mon4:325.55:076.010:400.911:140.86:205:53Waxing Gibbous10Mon
11Tue5:235.75:506.011:330.811:570.76:205:52Waxing Gibbous11Tue
12Wed6:076.06:306.012:200.86:215:50Full Moon12Wed
13Thu6:486.17:075.912:370.61:040.86:225:49Full Moon13Thu
14Fri7:256.27:445.71:140.61:460.86:235:48Full Moon14Fri
15Sat8:016.28:205.51:490.62:260.96:235:47Full Moon15Sat
16Sun8:376.18:575.32:230.73:031.16:245:45Waning Gibbous16Sun
17Mon9:116.09:335.12:560.93:401.26:255:44Waning Gibbous17Mon
18Tue9:455.910:104.93:291.04:161.46:265:43Waning Gibbous18Tue
19Wed10:225.810:494.74:051.14:561.66:265:42Waning Gibbous19Wed
20Thu11:055.711:344.64:461.25:411.76:275:41Waning Gibbous20Thu
21Fri11:555.65:341.36:341.86:285:40Third Quarter21Fri
22Sat12:274.612:525.66:311.37:311.76:295:39Third Quarter22Sat
23Sun1:274.71:525.77:341.38:271.56:305:38Third Quarter23Sun
24Mon2:285.02:515.88:381.19:221.26:305:37Waning Crescent24Mon
25Tue3:295.33:495.99:410.910:140.86:315:35Waning Crescent25Tue
26Wed4:285.84:456.110:420.611:050.46:325:34Waning Crescent26Wed
27Thu5:236.35:376.211:400.311:550.06:335:33Waning Crescent27Thu
28Fri6:146.76:276.212:350.06:345:32New Moon28Fri
29Sat7:057.07:186.112:44-0.21:30-0.16:355:31New Moon29Sat
30Sun7:577.28:106.01:33-0.42:23-0.16:355:31New Moon30Sun
31Mon8:527.19:055.82:24-0.43:170.06:365:30Waxing Crescent31Mon
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