Tides Today & Tomorrow in Southwest Harbor, ME

TIDE TIMES for Tuesday, August 11, 2026
The tide is currently falling in Southwest Harbor, ME.
Next low tide : in 4h 45m at 3:38 pm (0.3 ft)
Next high tide : 10:19 pm (12.1 ft)
Sunset today : 7:44 pm
Sunrise tomorrow : 5:32 am
Moon phase : New Moon (2% illuminated)
Tide Station Location : Station #8413564
Common Questions About Tides

Southwest Harbor, ME Tides - Mar 1972

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Wed11:3110.811:5010.64:580.05:180.06:095:21Full Moon1Wed
2Thu12:0910.55:360.15:520.36:085:22Waning Gibbous2Thu
3Fri12:2510.512:4610.16:130.36:270.66:065:24Waning Gibbous3Fri
4Sat1:0010.31:249.76:500.57:021.06:045:25Waning Gibbous4Sat
5Sun1:3610.12:049.37:300.87:401.46:025:26Waning Gibbous5Sun
6Mon2:169.82:478.88:121.18:231.86:015:27Third Quarter6Mon
7Tue3:019.53:378.59:001.39:112.15:595:29Third Quarter7Tue
8Wed3:529.34:338.29:551.510:072.25:575:30Third Quarter8Wed
9Thu4:509.25:358.210:551.511:082.15:555:31Third Quarter9Thu
10Fri5:519.46:358.511:561.25:535:33Waning Crescent10Fri
11Sat6:519.87:309.112:091.812:520.85:525:34Waning Crescent11Sat
12Sun7:4610.48:209.81:061.21:440.25:505:35Waning Crescent12Sun
13Mon8:3711.09:0710.61:590.52:31-0.35:485:36Waning Crescent13Mon
14Tue9:2611.59:5111.32:48-0.23:16-0.85:465:38New Moon14Tue
15Wed10:1311.910:3611.93:36-0.94:00-1.15:445:39New Moon15Wed
16Thu11:0112.011:2112.34:24-1.44:45-1.25:435:40New Moon16Thu
17Fri11:4911.95:12-1.65:31-1.15:415:41Waxing Crescent17Fri
18Sat12:0812.512:4011.66:03-1.66:20-0.75:395:43Waxing Crescent18Sat
19Sun12:5712.31:3311.06:56-1.47:12-0.25:375:44Waxing Crescent19Sun
20Mon1:5111.92:3110.47:52-0.98:100.45:355:45First Quarter20Mon
21Tue2:4911.33:359.88:54-0.39:130.95:335:46First Quarter21Tue
22Wed3:5510.74:449.410:020.210:231.25:315:48First Quarter22Wed
23Thu5:0510.35:549.211:120.411:341.35:305:49First Quarter23Thu
24Fri6:1610.17:009.412:190.55:285:50Waxing Gibbous24Fri
25Sat7:2110.27:589.712:411.11:180.45:265:51Waxing Gibbous25Sat
26Sun8:1810.48:4810.11:400.82:110.25:245:53Waxing Gibbous26Sun
27Mon9:0710.59:3110.42:310.42:560.25:225:54Waxing Gibbous27Mon
28Tue9:5110.610:1010.63:160.23:360.25:205:55Full Moon28Tue
29Wed10:3110.510:4510.73:570.04:130.35:195:56Full Moon29Wed
30Thu11:0810.411:1910.74:350.04:480.55:175:58Full Moon30Thu
31Fri11:4410.211:5210.65:100.05:210.85:155:59Full Moon31Fri
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 6:58 pm — 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 spring phase. Tonight's moon is 2% 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 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 New Moon (2% illuminated). This places Southwest Harbor, 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