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 (tomorrow) : 8:49 am (-0.8 ft)
Next high tide (tomorrow) : in 3h 30m at 2:30 am (10.6 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 - Oct 2067

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sat6:318.06:478.712:141.012:271.86:376:21Third Quarter1Sat
2Sun7:308.07:468.61:141.21:301.86:396:19Waning Crescent2Sun
3Mon8:248.28:418.72:111.22:271.66:406:17Waning Crescent3Mon
4Tue9:128.59:298.93:011.03:171.26:416:15Waning Crescent4Tue
5Wed9:548.810:129.03:430.94:000.96:426:14Waning Crescent5Wed
6Thu10:329.110:529.14:200.74:400.66:436:12New Moon6Thu
7Fri11:089.411:309.24:550.65:160.36:456:10New Moon7Fri
8Sat11:429.65:280.65:520.16:466:08New Moon8Sat
9Sun12:079.212:159.76:020.66:290.06:476:07New Moon9Sun
10Mon12:449.112:509.96:380.67:06-0.16:486:05Waxing Crescent10Mon
11Tue1:219.01:279.97:150.67:47-0.16:496:03Waxing Crescent11Tue
12Wed2:018.92:089.97:560.78:310.06:516:01Waxing Crescent12Wed
13Thu2:468.72:559.88:420.89:210.16:526:00Waxing Crescent13Thu
14Fri3:378.63:499.79:341.010:170.26:535:58First Quarter14Fri
15Sat4:358.54:509.610:321.011:170.36:545:56First Quarter15Sat
16Sun5:388.65:559.511:361.06:555:55First Quarter16Sun
17Mon6:428.87:039.612:200.212:430.86:575:53Waxing Gibbous17Mon
18Tue7:469.38:099.81:230.11:510.46:585:51Waxing Gibbous18Tue
19Wed8:459.89:1110.02:25-0.12:54-0.26:595:50Waxing Gibbous19Wed
20Thu9:3910.310:0710.23:21-0.43:52-0.77:005:48Waxing Gibbous20Thu
21Fri10:2910.811:0110.34:13-0.64:45-1.17:025:47Full Moon21Fri
22Sat11:1811.011:5210.25:02-0.65:36-1.37:035:45Full Moon22Sat
23Sun12:0511.05:50-0.46:25-1.37:045:43Full Moon23Sun
24Mon12:4110.012:5210.86:37-0.27:13-1.17:055:42Waning Gibbous24Mon
25Tue1:309.71:3810.57:230.28:01-0.77:075:40Waning Gibbous25Tue
26Wed2:189.22:2510.08:100.68:50-0.27:085:39Waning Gibbous26Wed
27Thu3:088.83:159.58:591.19:410.37:095:37Waning Gibbous27Thu
28Fri4:018.44:099.19:521.410:350.87:115:36Third Quarter28Fri
29Sat4:568.25:068.710:491.711:301.17:125:35Third Quarter29Sat
30Sun5:518.16:038.411:471.97:135:33Third Quarter30Sun
31Mon6:458.17:018.312:251.312:471.87:155:32Third 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 5:39 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 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