Tides Today & Tomorrow in Southwest Harbor, ME

TIDE TIMES for Wednesday, July 15, 2026
The tide is currently falling in Southwest Harbor, ME.
Next low tide : in 5h 07m at 5:29 am (-1.3 ft)
Next high tide : 12:06 pm (11.0 ft)
Sunset today : 8:14 pm
Sunrise tomorrow : 5:03 am
Moon phase : New Moon (2% illuminated)
Tide Station Location : Station #8413564
Common Questions About Tides

Southwest Harbor, ME Tides - Feb 1981

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sun7:5110.08:279.11:121.61:520.66:514:42Waning Crescent1Sun
2Mon8:3810.49:129.52:001.22:370.26:494:44Waning Crescent2Mon
3Tue9:2210.99:5510.02:450.93:20-0.36:484:45New Moon3Tue
4Wed10:0411.410:3610.43:280.54:01-0.76:474:47New Moon4Wed
5Thu10:4711.711:1710.84:110.14:43-1.06:464:48New Moon5Thu
6Fri11:3012.04:54-0.25:25-1.26:454:49Waxing Crescent6Fri
7Sat12:0011.112:1612.05:40-0.56:09-1.26:434:51Waxing Crescent7Sat
8Sun12:4511.31:0411.86:28-0.66:56-1.06:424:52Waxing Crescent8Sun
9Mon1:3311.41:5511.47:19-0.57:45-0.76:414:54Waxing Crescent9Mon
10Tue2:2411.32:5110.98:15-0.48:39-0.36:394:55First Quarter10Tue
11Wed3:2011.13:5210.39:16-0.29:380.16:384:56First Quarter11Wed
12Thu4:2110.94:599.910:210.010:420.56:364:58First Quarter12Thu
13Fri5:2610.86:089.711:290.011:490.66:354:59Waxing Gibbous13Fri
14Sat6:3210.87:169.712:36-0.16:345:00Waxing Gibbous14Sat
15Sun7:3611.08:179.912:550.61:39-0.46:325:02Waxing Gibbous15Sun
16Mon8:3411.29:1210.21:550.42:35-0.66:315:03Waxing Gibbous16Mon
17Tue9:2711.410:0110.52:500.23:25-0.86:295:05Full Moon17Tue
18Wed10:1511.510:4610.63:390.04:11-0.86:285:06Full Moon18Wed
19Thu10:5911.411:2710.64:25-0.14:53-0.76:265:07Full Moon19Thu
20Fri11:4111.25:070.05:33-0.46:245:09Full Moon20Fri
21Sat12:0610.612:2110.95:480.16:11-0.16:235:10Waning Gibbous21Sat
22Sun12:4410.41:0110.56:280.36:490.36:215:11Waning Gibbous22Sun
23Mon1:2210.21:4110.17:080.67:270.76:205:13Waning Gibbous23Mon
24Tue2:0210.02:239.67:500.98:071.16:185:14Waning Gibbous24Tue
25Wed2:439.73:099.18:351.18:511.56:165:15Third Quarter25Wed
26Thu3:299.54:008.79:241.49:401.86:155:17Third Quarter26Thu
27Fri4:209.34:568.510:191.510:342.06:135:18Third Quarter27Fri
28Sat5:159.35:568.411:171.411:321.96:115:19Third Quarter28Sat
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 8:47 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 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