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 52m at 8:49 am (-0.8 ft)
Next high tide : 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 - Jan 2068

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sun7:249.18:058.01:001.31:500.67:134:13Waning Crescent1Sun
2Mon8:159.68:558.41:541.02:410.07:134:14Waning Crescent2Mon
3Tue9:0410.19:448.82:450.63:29-0.67:134:15New Moon3Tue
4Wed9:5210.610:329.33:340.14:17-1.17:134:16New Moon4Wed
5Thu10:4111.011:219.74:24-0.35:05-1.47:134:17New Moon5Thu
6Fri11:3111.25:14-0.65:52-1.77:134:18New Moon6Fri
7Sat12:0910.012:2111.26:05-0.86:41-1.77:134:19Waxing Crescent7Sat
8Sun12:5810.21:1310.96:58-0.97:30-1.57:134:20Waxing Crescent8Sun
9Mon1:4910.22:0810.57:53-0.88:22-1.27:124:21Waxing Crescent9Mon
10Tue2:4410.23:079.98:51-0.69:17-0.77:124:22First Quarter10Tue
11Wed3:4110.04:099.39:54-0.310:15-0.27:124:23First Quarter11Wed
12Thu4:419.95:158.810:59-0.111:160.37:114:24First Quarter12Thu
13Fri5:439.76:228.512:070.17:114:25Waxing Gibbous13Fri
14Sat6:469.67:298.412:210.61:150.17:104:27Waxing Gibbous14Sat
15Sun7:479.68:298.41:250.82:160.07:104:28Waxing Gibbous15Sun
16Mon8:439.79:228.52:240.83:10-0.27:094:29Waxing Gibbous16Mon
17Tue9:329.810:108.63:160.73:58-0.37:094:30Full Moon17Tue
18Wed10:189.810:538.74:030.64:41-0.37:084:32Full Moon18Wed
19Thu11:009.811:338.84:450.65:20-0.37:084:33Full Moon19Thu
20Fri11:389.75:250.55:56-0.27:074:34Full Moon20Fri
21Sat12:098.812:159.56:020.66:30-0.17:064:35Waning Gibbous21Sat
22Sun12:448.812:519.36:390.67:030.17:054:37Waning Gibbous22Sun
23Mon1:188.81:279.07:160.77:370.37:054:38Waning Gibbous23Mon
24Tue1:538.72:068.67:550.88:130.67:044:39Waning Gibbous24Tue
25Wed2:318.72:488.38:370.98:530.87:034:41Third Quarter25Wed
26Thu3:128.63:348.09:231.19:371.17:024:42Third Quarter26Thu
27Fri3:578.64:267.710:141.110:251.37:014:43Third Quarter27Fri
28Sat4:478.65:227.611:091.111:191.37:004:45Third Quarter28Sat
29Sun5:428.86:247.612:090.96:594:46Waning Crescent29Sun
30Mon6:419.17:277.912:181.21:110.56:584:47Waning Crescent30Mon
31Tue7:419.68:258.41:190.92:090.06:574:49Waning Crescent31Tue
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 11:58 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