Tides Today & Tomorrow in South Harpswell, ME

TIDE TIMES for Tuesday, July 21, 2026
The tide is currently falling in South Harpswell, ME.
Next low tide (tomorrow) : in 3h 27m at 12:04 am (0.9 ft)
Next high tide (tomorrow) : 6:15 am (8.2 ft)
Sunset today : 8:15 pm
Sunrise tomorrow : 5:17 am
Moon phase : First Quarter (52% illuminated)
Tide Station Location : Station #8417647
Common Questions About Tides

South Harpswell, ME Tides - Jun 1986

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sun7:198.87:569.11:071.21:340.75:008:14Waning Crescent1Sun
2Mon8:208.68:489.32:111.02:280.95:008:15Waning Crescent2Mon
3Tue9:168.59:349.43:070.83:171.14:598:16Waning Crescent3Tue
4Wed10:068.410:169.53:570.64:011.34:598:17Waning Crescent4Wed
5Thu10:528.410:569.64:420.44:421.44:598:17New Moon5Thu
6Fri11:358.311:349.65:230.35:201.54:588:18New Moon6Fri
7Sat12:158.36:020.35:581.64:588:19New Moon7Sat
8Sun12:119.512:548.36:390.36:341.64:588:19New Moon8Sun
9Mon12:489.51:328.27:150.37:111.74:588:20Waxing Crescent9Mon
10Tue1:259.42:098.17:510.47:491.74:578:21Waxing Crescent10Tue
11Wed2:029.32:488.18:290.58:301.84:578:21Waxing Crescent11Wed
12Thu2:429.23:298.19:090.59:141.74:578:22Waxing Crescent12Thu
13Fri3:259.14:128.39:510.510:021.74:578:22First Quarter13Fri
14Sat4:139.04:588.510:360.510:541.54:578:23First Quarter14Sat
15Sun5:048.95:458.811:230.511:491.24:578:23First Quarter15Sun
16Mon5:598.86:359.312:120.54:578:23First Quarter16Mon
17Tue6:578.87:279.812:470.81:050.54:578:24Waxing Gibbous17Tue
18Wed7:588.98:2110.31:470.42:010.44:578:24Waxing Gibbous18Wed
19Thu8:599.09:1610.72:47-0.22:570.34:578:24Waxing Gibbous19Thu
20Fri9:589.210:1011.13:45-0.73:520.14:578:25Full Moon20Fri
21Sat10:569.411:0511.44:40-1.14:470.04:588:25Full Moon21Sat
22Sun11:539.55:36-1.45:430.04:588:25Full Moon22Sun
23Mon12:0111.412:499.66:31-1.56:390.04:588:25Full Moon23Mon
24Tue12:5711.31:459.57:26-1.47:350.14:588:25Waning Gibbous24Tue
25Wed1:5211.12:409.58:20-1.18:320.34:598:26Waning Gibbous25Wed
26Thu2:4910.63:369.49:15-0.89:310.64:598:26Waning Gibbous26Thu
27Fri3:4710.14:339.310:10-0.310:320.84:598:26Third Quarter27Fri
28Sat4:469.55:289.211:050.111:341.05:008:26Third Quarter28Sat
29Sun5:468.96:229.111:580.65:008:26Third Quarter29Sun
30Mon6:458.57:159.112:361.112:521.15:018:25Third Quarter30Mon
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 3:09 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 neap phase. Tonight's moon is 52% 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 minimum.

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 First Quarter (52% illuminated). This places South Harpswell, ME in a neap tide cycle, so tidal ranges are near their weekly minimum 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