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 1h 49m 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 - May 2069

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Wed8:378.79:059.02:271.12:490.85:307:43Waxing Gibbous1Wed
2Thu9:308.79:509.23:210.83:360.95:297:44Waxing Gibbous2Thu
3Fri10:168.710:319.44:070.64:180.95:287:45Waxing Gibbous3Fri
4Sat10:598.811:099.64:490.34:560.95:267:46Full Moon4Sat
5Sun11:398.811:459.65:280.25:320.95:257:48Full Moon5Sun
6Mon12:188.86:040.16:061.05:247:49Full Moon6Mon
7Tue12:209.712:548.76:380.16:411.05:227:50Full Moon7Tue
8Wed12:549.71:308.77:130.17:161.15:217:51Waning Gibbous8Wed
9Thu1:289.62:068.67:490.17:541.25:207:52Waning Gibbous9Thu
10Fri2:059.62:458.58:270.28:351.25:197:53Waning Gibbous10Fri
11Sat2:459.53:278.59:090.29:201.25:187:54Waning Gibbous11Sat
12Sun3:309.44:158.69:550.310:111.25:167:55Third Quarter12Sun
13Mon4:229.35:068.710:450.311:061.15:157:57Third Quarter13Mon
14Tue5:189.26:009.011:380.35:147:58Third Quarter14Tue
15Wed6:189.26:579.412:050.912:340.25:137:59Third Quarter15Wed
16Thu7:219.37:559.91:080.51:330.05:128:00Waning Crescent16Thu
17Fri8:259.58:5210.52:110.02:31-0.25:118:01Waning Crescent17Fri
18Sat9:269.89:4711.03:12-0.63:28-0.45:108:02Waning Crescent18Sat
19Sun10:2310.010:4011.44:08-1.24:22-0.65:098:03New Moon19Sun
20Mon11:1910.211:3311.65:03-1.65:15-0.75:088:04New Moon20Mon
21Tue12:1410.25:57-1.86:08-0.65:088:05New Moon21Tue
22Wed12:2611.61:0810.26:50-1.87:02-0.45:078:06Waxing Crescent22Wed
23Thu1:1811.42:0110.07:42-1.57:55-0.15:068:07Waxing Crescent23Thu
24Fri2:1110.92:559.78:35-1.18:500.35:058:08Waxing Crescent24Fri
25Sat3:0610.43:519.49:30-0.79:470.65:048:09Waxing Crescent25Sat
26Sun4:039.84:489.210:25-0.110:471.05:048:10First Quarter26Sun
27Mon5:019.35:449.011:200.311:481.25:038:11First Quarter27Mon
28Tue6:008.86:388.912:150.75:028:12First Quarter28Tue
29Wed6:598.57:328.912:491.31:101.05:028:13First Quarter29Wed
30Thu7:578.38:239.01:491.32:041.25:018:13Waxing Gibbous30Thu
31Fri8:528.29:119.22:451.12:531.35:018:14Waxing Gibbous31Fri
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
Tidal Data Source: (8417647)

Common Questions About South Harpswell, ME Tides

Show All
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