Tides Today & Tomorrow in St. Simons Island, GA

TIDE TIMES for Tuesday, August 4, 2026
The tide is currently rising in St. Simons Island, GA.
Next low tide (tomorrow) : 7:38 am (0.2 ft)
Next high tide (tomorrow) : in 4h 11m at 1:14 am (6.3 ft)
Sunset today : 8:18 pm
Sunrise tomorrow : 6:44 am
Moon phase : Third Quarter (66% illuminated)
Tide Station Location : Station #8677344
Common Questions About Tides

St. Simons Island, GA Tides - Jan 1961

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sun7:416.98:056.01:39-0.52:18-0.27:245:34Full Moon1Sun
2Mon8:196.98:435.92:17-0.52:53-0.27:245:35Full Moon2Mon
3Tue8:566.89:195.72:53-0.43:26-0.17:245:35Full Moon3Tue
4Wed9:326.69:555.63:28-0.33:580.07:245:36Waning Gibbous4Wed
5Thu10:086.410:315.54:02-0.14:290.17:245:37Waning Gibbous5Thu
6Fri10:456.211:085.44:380.15:030.17:245:38Waning Gibbous6Fri
7Sat11:256.011:495.55:170.35:410.27:255:39Waning Gibbous7Sat
8Sun12:085.96:020.46:260.27:255:39Third Quarter8Sun
9Mon12:355.612:565.86:560.57:180.17:255:40Third Quarter9Mon
10Tue1:275.71:515.77:590.58:160.07:255:41Third Quarter10Tue
11Wed2:255.92:515.79:070.49:18-0.27:255:42Third Quarter11Wed
12Thu3:286.23:555.810:140.110:21-0.57:245:43Waning Crescent12Thu
13Fri4:336.74:596.011:17-0.311:23-0.97:245:43Waning Crescent13Fri
14Sat5:367.15:596.412:18-0.77:245:44Waning Crescent14Sat
15Sun6:337.66:556.712:23-1.31:15-1.17:245:45New Moon15Sun
16Mon7:287.97:506.91:21-1.62:09-1.57:245:46New Moon16Mon
17Tue8:218.08:437.12:16-1.93:00-1.77:245:47New Moon17Tue
18Wed9:158.09:387.13:09-1.93:50-1.87:235:48Waxing Crescent18Wed
19Thu10:097.710:337.04:01-1.84:39-1.77:235:49Waxing Crescent19Thu
20Fri11:037.311:296.84:54-1.45:30-1.47:235:50Waxing Crescent20Fri
21Sat11:586.95:49-0.96:22-1.17:235:51Waxing Crescent21Sat
22Sun12:246.612:526.46:49-0.57:18-0.77:225:51First Quarter22Sun
23Mon1:196.41:476.07:52-0.18:14-0.57:225:52First Quarter23Mon
24Tue2:156.32:435.78:560.29:10-0.37:215:53First Quarter24Tue
25Wed3:126.13:415.59:560.310:04-0.27:215:54Waxing Gibbous25Wed
26Thu4:096.14:385.410:510.310:56-0.27:215:55Waxing Gibbous26Thu
27Fri5:046.25:305.511:420.211:44-0.37:205:56Waxing Gibbous27Fri
28Sat5:536.36:185.612:290.17:195:57Waxing Gibbous28Sat
29Sun6:386.57:015.812:31-0.41:12-0.17:195:58Waxing Gibbous29Sun
30Mon7:186.67:415.81:14-0.51:51-0.27:185:59Full Moon30Mon
31Tue7:566.68:185.91:54-0.52:26-0.37:186:00Full Moon31Tue
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
Tidal Data Source: (8677344)

Common Questions About St. Simons Island, GA Tides

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What time does the tide turn (slack tide) in St. Simons Island, GA today?

Slack tide in St. Simons Island, GA is approximately 4:26 am — 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 St. Simons Island, GA?

St. Simons Island, GA is currently in a transitional phase. Tonight's moon is 66% 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 St. Simons Island, GA 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 St. Simons Island, GA?

Tide predictions for St. Simons Island, GA 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 St. Simons Island, GA?

Tide data for St. Simons Island, GA is sourced from NOAA Station #8677344. View the official NOAA station page at https://tidesandcurrents.noaa.gov/stationhome.html?id=8677344.

What is the moon phase in St. Simons Island, GA tonight?

Tonight the moon over St. Simons Island, GA is Third Quarter (66% illuminated). This places St. Simons Island, GA 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