Tides Today & Tomorrow in South Harpswell, ME

TIDE TIMES for Thursday, July 30, 2026
The tide is currently falling in South Harpswell, ME.
Next low tide : in 4h 47m at 6:30 am (0.2 ft)
Next high tide : 12:45 pm (8.5 ft)
Sunset today : 8:05 pm
Sunrise tomorrow : 5:27 am
Moon phase : Full Moon (99% illuminated)
Tide Station Location : Station #8417647
Common Questions About Tides

South Harpswell, ME Tides - Mar 2078

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Tue12:379.112:519.26:390.36:570.36:155:28Waning Gibbous1Tue
2Wed1:109.01:288.87:150.47:300.66:135:30Waning Gibbous2Wed
3Thu1:438.92:068.47:530.68:051.06:115:31Waning Gibbous3Thu
4Fri2:198.72:488.08:340.88:451.36:105:32Waning Gibbous4Fri
5Sat2:598.63:357.69:201.09:291.76:085:34Third Quarter5Sat
6Sun3:458.44:287.310:101.210:191.96:065:35Third Quarter6Sun
7Mon4:378.35:277.111:061.411:152.06:055:36Third Quarter7Mon
8Tue5:368.36:317.212:091.36:035:37Third Quarter8Tue
9Wed6:398.57:327.512:171.91:131.06:015:39Waning Crescent9Wed
10Thu7:419.08:268.01:191.62:100.55:595:40Waning Crescent10Thu
11Fri8:369.69:158.72:171.03:00-0.15:585:41Waning Crescent11Fri
12Sat9:2710.110:019.43:090.33:46-0.75:565:42New Moon12Sat
13Sun11:1610.611:4610.14:59-0.45:31-1.26:546:44New Moon13Sun
14Mon12:0410.95:48-1.06:16-1.46:526:45New Moon14Mon
15Tue12:3110.612:5310.96:37-1.57:01-1.46:506:46Waxing Crescent15Tue
16Wed1:1610.91:4310.77:27-1.67:48-1.26:496:47Waxing Crescent16Wed
17Thu2:0211.02:3410.28:18-1.68:36-0.86:476:49Waxing Crescent17Thu
18Fri2:5210.83:309.69:12-1.29:29-0.26:456:50Waxing Crescent18Fri
19Sat3:4610.44:319.010:11-0.710:260.56:436:51First Quarter19Sat
20Sun4:469.85:378.511:15-0.211:301.06:416:52First Quarter20Sun
21Mon5:529.46:478.112:250.26:406:53First Quarter21Mon
22Tue7:039.17:588.012:401.41:370.56:386:55Waxing Gibbous22Tue
23Wed8:149.09:028.21:541.42:450.46:366:56Waxing Gibbous23Wed
24Thu9:179.19:568.53:001.23:420.36:346:57Waxing Gibbous24Thu
25Fri10:109.310:428.83:560.94:290.26:326:58Waxing Gibbous25Fri
26Sat10:569.311:239.04:430.65:110.16:317:00Full Moon26Sat
27Sun11:389.411:599.25:260.45:480.26:297:01Full Moon27Sun
28Mon12:169.36:040.26:210.36:277:02Full Moon28Mon
29Tue12:339.312:529.16:400.26:530.56:257:03Full Moon29Tue
30Wed1:049.31:278.97:140.27:230.76:237:04Waning Gibbous30Wed
31Thu1:359.32:028.67:480.27:550.96:227:06Waning Gibbous31Thu
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 9:37 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 spring phase. Tonight's moon is 99% 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 near their weekly maximum.

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 Full Moon (99% illuminated). This places South Harpswell, ME in a spring tide cycle, so tidal ranges are near their weekly maximum 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