Tides Today & Tomorrow in South Harpswell, ME

TIDE TIMES for Saturday, July 18, 2026
The tide is currently falling in South Harpswell, ME.
Next low tide : in 5h 32m at 9:10 pm (0.2 ft)
Next high tide (tomorrow) : 3:24 am (10.0 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 - Sep 2068

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sat2:268.82:409.18:260.98:520.86:047:14Waxing Crescent1Sat
2Sun3:058.53:189.09:041.19:340.96:067:12Waxing Crescent2Sun
3Mon3:488.24:028.99:461.310:221.16:077:11First Quarter3Mon
4Tue4:368.04:518.910:331.511:141.16:087:09First Quarter4Tue
5Wed5:297.85:459.011:251.56:097:07First Quarter5Wed
6Thu6:277.96:439.112:101.112:221.56:107:05First Quarter6Thu
7Fri7:288.17:459.51:100.91:231.26:117:03Waxing Gibbous7Fri
8Sat8:288.68:459.92:110.42:250.76:127:02Waxing Gibbous8Sat
9Sun9:239.29:4110.43:07-0.13:230.16:137:00Waxing Gibbous9Sun
10Mon10:149.910:3510.93:59-0.64:18-0.66:156:58Full Moon10Mon
11Tue11:0410.511:2811.14:49-1.15:11-1.26:166:56Full Moon11Tue
12Wed11:5411.05:38-1.46:03-1.56:176:54Full Moon12Wed
13Thu12:2011.212:4411.36:28-1.46:56-1.76:186:52Waning Gibbous13Thu
14Fri1:1311.01:3411.37:17-1.37:49-1.66:196:51Waning Gibbous14Fri
15Sat2:0610.62:2611.18:08-0.98:44-1.26:206:49Waning Gibbous15Sat
16Sun3:0210.13:2110.79:02-0.49:42-0.86:216:47Third Quarter16Sun
17Mon4:019.54:2110.29:590.210:45-0.26:226:45Third Quarter17Mon
18Tue5:059.05:249.811:010.711:500.26:236:43Third Quarter18Tue
19Wed6:098.66:299.412:071.16:256:41Third Quarter19Wed
20Thu7:148.57:349.212:560.51:141.26:266:40Waning Crescent20Thu
21Fri8:168.58:359.22:010.62:181.26:276:38Waning Crescent21Fri
22Sat9:108.79:289.32:580.63:141.06:286:36Waning Crescent22Sat
23Sun9:578.910:149.33:460.54:020.86:296:34Waning Crescent23Sun
24Mon10:399.110:579.34:280.54:450.66:306:32New Moon24Mon
25Tue11:179.311:369.35:060.55:240.46:316:30New Moon25Tue
26Wed11:529.45:410.56:000.36:336:29New Moon26Wed
27Thu12:139.212:269.46:130.66:350.36:346:27New Moon27Thu
28Fri12:499.112:589.46:450.77:090.36:356:25Waxing Crescent28Fri
29Sat1:248.91:309.47:180.97:440.46:366:23Waxing Crescent29Sat
30Sun1:598.72:059.37:531.08:220.56:376:21Waxing Crescent30Sun
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 12:17 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 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