Tides Today & Tomorrow in South Harpswell, ME

TIDE TIMES for Friday, July 17, 2026
The tide is currently rising in South Harpswell, ME.
Next low tide : 8:14 pm (-0.1 ft)
Next high tide : in 5h 39m at 2:17 pm (9.8 ft)
Sunset today : 8:18 pm
Sunrise tomorrow : 5:14 am
Moon phase : Waxing Crescent (14% illuminated)
Tide Station Location : Station #8417647
Common Questions About Tides

South Harpswell, ME Tides - Aug 1987

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sat3:498.74:159.19:570.710:281.05:288:04First Quarter1Sat
2Sun4:368.55:009.310:410.911:190.95:298:02First Quarter2Sun
3Mon5:298.25:509.411:301.05:308:01First Quarter3Mon
4Tue6:278.16:469.612:160.712:251.15:318:00Waxing Gibbous4Tue
5Wed7:318.17:499.91:180.61:261.15:327:59Waxing Gibbous5Wed
6Thu8:388.28:5310.32:240.22:300.95:347:57Waxing Gibbous6Thu
7Fri9:418.69:5410.73:27-0.23:320.55:357:56Waxing Gibbous7Fri
8Sat10:409.010:5211.14:25-0.74:310.15:367:55Full Moon8Sat
9Sun11:369.511:4911.35:20-1.15:29-0.35:377:53Full Moon9Sun
10Mon12:299.96:13-1.36:25-0.55:387:52Full Moon10Mon
11Tue12:4311.31:2010.27:04-1.47:19-0.65:397:50Waning Gibbous11Tue
12Wed1:3711.02:1010.37:53-1.28:14-0.65:407:49Waning Gibbous12Wed
13Thu2:2910.53:0010.28:42-0.89:09-0.35:417:48Waning Gibbous13Thu
14Fri3:249.93:5210.09:32-0.210:060.05:427:46Third Quarter14Fri
15Sat4:219.24:459.710:240.411:050.45:447:45Third Quarter15Sat
16Sun5:208.65:409.411:181.05:457:43Third Quarter16Sun
17Mon6:218.16:389.112:060.712:151.55:467:41Third Quarter17Mon
18Tue7:247.87:388.91:101.01:161.85:477:40Waning Crescent18Tue
19Wed8:267.78:378.92:141.02:181.95:487:38Waning Crescent19Wed
20Thu9:217.89:309.03:111.03:131.85:497:37Waning Crescent20Thu
21Fri10:107.910:179.24:010.84:011.65:507:35Waning Crescent21Fri
22Sat10:548.210:599.44:440.64:441.45:517:34New Moon22Sat
23Sun11:338.411:389.55:230.55:231.25:537:32New Moon23Sun
24Mon12:108.65:580.36:001.05:547:30New Moon24Mon
25Tue12:159.612:438.86:300.36:360.85:557:29New Moon25Tue
26Wed12:509.51:159.07:010.27:110.75:567:27Waxing Crescent26Wed
27Thu1:249.41:469.27:320.37:480.65:577:25Waxing Crescent27Thu
28Fri1:599.22:199.38:050.48:270.55:587:23Waxing Crescent28Fri
29Sat2:379.02:559.48:420.69:100.55:597:22Waxing Crescent29Sat
30Sun3:208.73:379.59:230.89:580.56:007:20First Quarter30Sun
31Mon4:098.44:269.510:101.010:520.66:027:18First Quarter31Mon
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 5:15 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 spring phase. Tonight's moon is 14% 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 Waxing Crescent (14% 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