Tides Today & Tomorrow in South Harpswell, ME

TIDE TIMES for Tuesday, August 4, 2026
The tide is currently rising in South Harpswell, ME.
Next low tide (tomorrow) : 10:17 am (0.5 ft)
Next high tide (tomorrow) : in 6h 00m at 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 - Mar 2090

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Wed11:149.511:379.15:020.35:240.06:155:29New Moon1Wed
2Thu11:499.45:360.25:550.06:135:30New Moon2Thu
3Fri12:099.212:239.36:100.26:260.16:115:31Waxing Crescent3Fri
4Sat12:419.212:579.16:440.26:590.26:105:32Waxing Crescent4Sat
5Sun1:129.21:328.97:200.27:340.46:085:34Waxing Crescent5Sun
6Mon1:479.12:118.67:590.38:140.66:065:35Waxing Crescent6Mon
7Tue2:269.12:568.48:440.48:580.86:045:36First Quarter7Tue
8Wed3:129.13:478.29:340.59:490.96:035:38First Quarter8Wed
9Thu4:049.04:448.110:290.510:451.06:015:39First Quarter9Thu
10Fri5:039.15:488.211:300.411:480.95:595:40First Quarter10Fri
11Sat6:089.36:558.512:350.25:575:41Waxing Gibbous11Sat
12Sun8:159.78:579.012:540.62:39-0.36:566:43Waxing Gibbous12Sun
13Mon9:1710.29:549.72:580.03:38-0.86:546:44Waxing Gibbous13Mon
14Tue10:1510.710:4810.33:57-0.74:31-1.36:526:45Full Moon14Tue
15Wed11:1011.111:3910.84:52-1.35:23-1.76:506:46Full Moon15Wed
16Thu12:0311.25:46-1.76:13-1.86:486:47Full Moon16Thu
17Fri12:2911.112:5511.16:38-1.97:02-1.76:476:49Waning Gibbous17Fri
18Sat1:1811.21:4710.87:29-1.87:51-1.36:456:50Waning Gibbous18Sat
19Sun2:0711.02:3910.38:21-1.58:41-0.86:436:51Waning Gibbous19Sun
20Mon2:5810.63:349.79:15-1.19:34-0.16:416:52Waning Gibbous20Mon
21Tue3:5210.14:329.110:13-0.510:310.56:396:54Third Quarter21Tue
22Wed4:509.55:348.511:130.111:311.06:386:55Third Quarter22Wed
23Thu5:519.16:378.212:170.56:366:56Third Quarter23Thu
24Fri6:548.77:408.112:351.41:220.86:346:57Third Quarter24Fri
25Sat7:578.68:388.21:411.52:230.86:326:58Waning Crescent25Sat
26Sun8:558.79:298.42:421.33:170.76:307:00Waning Crescent26Sun
27Mon9:458.910:148.73:341.14:020.66:297:01Waning Crescent27Mon
28Tue10:299.010:549.04:190.84:420.46:277:02Waning Crescent28Tue
29Wed11:109.211:309.24:590.55:180.36:257:03New Moon29Wed
30Thu11:489.35:350.35:510.36:237:04New Moon30Thu
31Fri12:059.412:249.36:100.16:230.36:217:06New Moon31Fri
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 7:14 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