Tides Today & Tomorrow in Southwest Harbor, ME

TIDE TIMES for Tuesday, July 21, 2026
The tide is currently falling in Southwest Harbor, ME.
Next low tide : in 2h 03m at 11:17 pm (1.0 ft)
Next high tide (tomorrow) : 5:52 am (9.3 ft)
Sunset today : 8:10 pm
Sunrise tomorrow : 5:09 am
Moon phase : First Quarter (52% illuminated)
Tide Station Location : Station #8413564
Common Questions About Tides

Southwest Harbor, ME Tides - Jan 2076

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Wed5:339.96:029.311:271.011:430.97:084:04Waning Crescent1Wed
2Thu6:2810.47:029.612:260.57:084:05Waning Crescent2Thu
3Fri7:2211.08:009.912:390.71:23-0.27:084:06Waning Crescent3Fri
4Sat8:1611.68:5510.41:350.42:18-0.87:084:07Waning Crescent4Sat
5Sun9:0912.29:4910.82:290.13:12-1.37:084:08New Moon5Sun
6Mon10:0212.610:4211.13:23-0.24:05-1.77:084:09New Moon6Mon
7Tue10:5512.811:3511.24:17-0.54:57-1.97:084:10New Moon7Tue
8Wed11:4912.75:11-0.65:51-1.87:074:11Waxing Crescent8Wed
9Thu12:2811.312:4412.56:07-0.56:44-1.57:074:12Waxing Crescent9Thu
10Fri1:2311.21:4012.07:04-0.37:39-1.17:074:13Waxing Crescent10Fri
11Sat2:1911.02:3911.38:03-0.18:35-0.67:074:15First Quarter11Sat
12Sun3:1710.83:4010.79:050.29:33-0.17:064:16First Quarter12Sun
13Mon4:1610.64:4410.110:080.410:320.47:064:17First Quarter13Mon
14Tue5:1610.45:489.611:120.511:310.87:054:18First Quarter14Tue
15Wed6:1510.36:509.412:130.57:054:19Waxing Gibbous15Wed
16Thu7:1110.47:489.312:291.01:110.47:044:21Waxing Gibbous16Thu
17Fri8:0310.48:409.41:231.12:030.27:044:22Waxing Gibbous17Fri
18Sat8:5010.59:269.52:131.12:500.17:034:23Waxing Gibbous18Sat
19Sun9:3310.610:079.52:581.13:330.07:024:24Full Moon19Sun
20Mon10:1310.710:459.63:391.04:120.07:024:26Full Moon20Mon
21Tue10:5110.811:219.74:171.04:480.07:014:27Full Moon21Tue
22Wed11:2610.711:569.74:541.05:230.17:004:28Full Moon22Wed
23Thu12:0210.65:291.05:570.26:594:30Waning Gibbous23Thu
24Fri12:319.712:3710.56:051.16:320.36:584:31Waning Gibbous24Fri
25Sat1:069.71:1410.36:411.17:070.46:584:32Waning Gibbous25Sat
26Sun1:439.81:5410.07:211.17:440.56:574:34Waning Gibbous26Sun
27Mon2:229.82:389.88:051.18:260.76:564:35Third Quarter27Mon
28Tue3:069.93:289.58:541.09:130.96:554:37Third Quarter28Tue
29Wed3:5610.04:249.39:490.910:061.06:544:38Third Quarter29Wed
30Thu4:5110.25:279.210:500.711:061.06:534:39Third Quarter30Thu
31Fri5:5110.46:339.311:540.46:514:41Waning Crescent31Fri
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
Tidal Data Source: (8413564)

Common Questions About Southwest Harbor, ME Tides

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What time does the tide turn (slack tide) in Southwest Harbor, ME today?

Slack tide in Southwest Harbor, ME is approximately 2:34 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 Southwest Harbor, ME?

Southwest Harbor, 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 Southwest Harbor, 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 Southwest Harbor, ME?

Tide predictions for Southwest Harbor, 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 Southwest Harbor, ME?

Tide data for Southwest Harbor, ME is sourced from NOAA Station #8413564. View the official NOAA station page at https://tidesandcurrents.noaa.gov/stationhome.html?id=8413564.

What is the moon phase in Southwest Harbor, ME tonight?

Tonight the moon over Southwest Harbor, ME is First Quarter (52% illuminated). This places Southwest Harbor, 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