Tides Today & Tomorrow in South Harpswell, ME

TIDE TIMES for Saturday, July 18, 2026
The tide is currently rising in South Harpswell, ME.
Next low tide : 9:10 pm (0.2 ft)
Next high tide : in 5h 45m at 3:08 pm (9.8 ft)
Sunset today : 8:17 pm
Sunrise tomorrow : 5:15 am
Moon phase : Waxing Crescent (23% illuminated)
Tide Station Location : Station #8417647
Common Questions About Tides

South Harpswell, ME Tides - Jun 2068

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Fri12:1110.912:539.46:36-1.06:430.35:008:15New Moon1Fri
2Sat12:5810.61:409.37:23-0.87:300.65:008:16Waxing Crescent2Sat
3Sun1:4510.32:279.18:09-0.58:170.84:598:17Waxing Crescent3Sun
4Mon2:319.93:138.98:54-0.19:061.14:598:18Waxing Crescent4Mon
5Tue3:189.44:018.79:400.39:561.44:588:18Waxing Crescent5Tue
6Wed4:089.04:508.610:270.610:481.64:588:19First Quarter6Wed
7Thu4:598.65:388.611:131.011:421.74:588:20First Quarter7Thu
8Fri5:528.36:278.612:001.24:588:20First Quarter8Fri
9Sat6:468.07:168.712:371.712:491.44:588:21First Quarter9Sat
10Sun7:427.98:058.91:331.51:401.54:578:21Waxing Gibbous10Sun
11Mon8:377.98:529.12:271.32:291.54:578:22Waxing Gibbous11Mon
12Tue9:278.19:369.43:160.93:161.44:578:22Waxing Gibbous12Tue
13Wed10:148.310:199.84:010.64:001.24:578:23Waxing Gibbous13Wed
14Thu10:598.511:0110.14:440.24:441.04:578:23Full Moon14Thu
15Fri11:438.711:4510.45:27-0.25:280.84:578:24Full Moon15Fri
16Sat12:279.06:10-0.56:130.54:578:24Full Moon16Sat
17Sun12:2910.61:119.26:54-0.77:010.34:578:24Waning Gibbous17Sun
18Mon1:1510.71:579.57:39-0.97:500.24:578:25Waning Gibbous18Mon
19Tue2:0310.72:459.78:26-0.98:410.14:588:25Waning Gibbous19Tue
20Wed2:5510.53:379.89:15-0.89:370.14:588:25Waning Gibbous20Wed
21Thu3:5010.24:319.910:08-0.710:370.14:588:25Third Quarter21Thu
22Fri4:509.85:2810.011:02-0.411:380.14:588:25Third Quarter22Fri
23Sat5:529.46:2610.111:59-0.14:598:26Third Quarter23Sat
24Sun6:579.17:2610.212:430.112:590.24:598:26Waning Crescent24Sun
25Mon8:039.08:2610.31:490.02:010.44:598:26Waning Crescent25Mon
26Tue9:068.99:2310.42:53-0.23:010.55:008:26Waning Crescent26Tue
27Wed10:049.010:1710.53:51-0.43:570.55:008:26Waning Crescent27Wed
28Thu10:589.011:0810.54:45-0.54:490.55:018:26New Moon28Thu
29Fri11:499.111:5610.45:35-0.65:390.65:018:26New Moon29Fri
30Sat12:369.16:21-0.56:250.65:028:25New Moon30Sat
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 6:09 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 South Harpswell, ME?

South Harpswell, ME is currently in a transitional phase. Tonight's moon is 23% 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 Waxing Crescent (23% 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