Tides Today & Tomorrow in South Harpswell, ME

TIDE TIMES for Tuesday, August 4, 2026
The tide is currently falling in South Harpswell, ME.
Next low tide : in 5h 50m at 10:02 pm (0.4 ft)
Next high tide (tomorrow) : 4:11 am (8.9 ft)
Sunset today : 7:59 pm
Sunrise tomorrow : 5:32 am
Moon phase : Third Quarter (66% illuminated)
Tide Station Location : Station #8417647
Common Questions About Tides

South Harpswell, ME Tides - Aug 2089

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Mon6:378.47:009.712:260.712:380.85:308:02Waning Crescent1Mon
2Tue7:398.58:0110.11:260.41:380.75:318:01Waning Crescent2Tue
3Wed8:428.89:0110.52:290.02:390.35:328:00Waning Crescent3Wed
4Thu9:429.29:5911.03:28-0.53:38-0.15:337:58Waning Crescent4Thu
5Fri10:389.710:5511.34:23-1.04:35-0.55:347:57New Moon5Fri
6Sat11:3310.211:5011.55:17-1.55:31-0.95:357:56New Moon6Sat
7Sun12:2710.66:10-1.76:27-1.15:367:54New Moon7Sun
8Mon12:4511.51:1910.87:01-1.77:21-1.15:377:53Waxing Crescent8Mon
9Tue1:3811.32:1110.87:52-1.68:16-1.05:397:52Waxing Crescent9Tue
10Wed2:3310.93:0310.68:44-1.29:12-0.75:407:50Waxing Crescent10Wed
11Thu3:2910.33:5810.49:37-0.610:11-0.35:417:49First Quarter11Thu
12Fri4:289.64:5510.010:33-0.111:120.15:427:47First Quarter12Fri
13Sat5:289.15:539.711:300.55:437:46First Quarter13Sat
14Sun6:308.66:539.412:150.412:300.95:447:44First Quarter14Sun
15Mon7:328.37:529.31:190.71:311.25:457:43Waxing Gibbous15Mon
16Tue8:338.28:499.32:210.72:311.35:467:41Waxing Gibbous16Tue
17Wed9:278.39:399.43:170.63:241.25:487:40Waxing Gibbous17Wed
18Thu10:148.510:259.54:050.54:111.15:497:38Waxing Gibbous18Thu
19Fri10:578.611:079.64:480.44:531.05:507:36Full Moon19Fri
20Sat11:378.811:469.65:260.35:320.85:517:35Full Moon20Sat
21Sun12:149.06:010.26:080.75:527:33Full Moon21Sun
22Mon12:239.612:489.16:340.26:440.65:537:31Full Moon22Mon
23Tue12:589.51:219.27:060.27:190.65:547:30Waning Gibbous23Tue
24Wed1:329.41:549.27:390.37:560.55:557:28Waning Gibbous24Wed
25Thu2:089.22:289.38:130.48:350.55:577:26Waning Gibbous25Thu
26Fri2:469.13:069.48:520.59:190.55:587:25Waning Gibbous26Fri
27Sat3:298.83:499.49:340.610:070.65:597:23Third Quarter27Sat
28Sun4:188.64:399.510:220.711:000.56:007:21Third Quarter28Sun
29Mon5:138.55:349.611:150.811:580.56:017:20Third Quarter29Mon
30Tue6:128.56:349.712:130.86:027:18Third Quarter30Tue
31Wed7:178.67:3910.01:010.31:170.66:037:16Waning Crescent31Wed
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
Tidal Data Source: (8417647)

Common Questions About South Harpswell, ME Tides

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What time does the tide turn (slack tide) in South Harpswell, ME today?

Slack tide in South Harpswell, ME is approximately 1:06 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 South Harpswell, ME?

South Harpswell, ME 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 South Harpswell, ME 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 South Harpswell, ME?

Tide predictions for South Harpswell, ME 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 South Harpswell, ME?

Tide data for South Harpswell, ME is sourced from NOAA Station #8417647. View the official NOAA station page at https://tidesandcurrents.noaa.gov/stationhome.html?id=8417647.

What is the moon phase in South Harpswell, ME tonight?

Tonight the moon over South Harpswell, ME is Third Quarter (66% illuminated). This places South Harpswell, ME 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