Tides Today & Tomorrow in Southwest Harbor, ME

TIDE TIMES for Friday, July 31, 2026
The tide is currently rising in Southwest Harbor, ME.
Next low tide : 6:23 pm (1.1 ft)
Next high tide : in 4h 06m at 12:49 pm (10.0 ft)
Sunset today : 7:59 pm
Sunrise tomorrow : 5:19 am
Moon phase : Waning Gibbous (96% illuminated)
Tide Station Location : Station #8413564
Common Questions About Tides

Southwest Harbor, ME Tides - Feb 2088

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sun4:4710.85:279.710:490.111:080.66:504:42First Quarter1Sun
2Mon5:5310.96:369.811:58-0.16:494:44Waxing Gibbous2Mon
3Tue7:0011.27:4210.112:150.41:03-0.56:484:45Waxing Gibbous3Tue
4Wed8:0211.68:4210.51:210.12:04-0.96:474:46Waxing Gibbous4Wed
5Thu9:0012.09:3611.02:21-0.33:00-1.36:454:48Full Moon5Thu
6Fri9:5412.210:2711.33:16-0.63:51-1.56:444:49Full Moon6Fri
7Sat10:4512.311:1511.54:08-0.84:40-1.56:434:51Full Moon7Sat
8Sun11:3312.14:58-0.95:26-1.36:424:52Waning Gibbous8Sun
9Mon12:0111.512:2011.75:45-0.76:11-0.96:404:53Waning Gibbous9Mon
10Tue12:4611.31:0611.26:33-0.46:55-0.46:394:55Waning Gibbous10Tue
11Wed1:3111.01:5310.57:200.07:400.26:384:56Waning Gibbous11Wed
12Thu2:1610.52:429.98:080.48:260.76:364:58Third Quarter12Thu
13Fri3:0410.13:339.38:590.89:161.26:354:59Third Quarter13Fri
14Sat3:559.74:298.89:531.210:091.66:335:00Third Quarter14Sat
15Sun4:509.55:288.510:511.411:061.86:325:02Third Quarter15Sun
16Mon5:489.46:278.511:491.46:305:03Waning Crescent16Mon
17Tue6:449.57:228.712:041.812:451.26:295:04Waning Crescent17Tue
18Wed7:379.78:129.012:581.61:360.96:275:06Waning Crescent18Wed
19Thu8:2510.18:569.41:481.32:210.56:265:07Waning Crescent19Thu
20Fri9:0810.59:369.92:320.93:020.16:245:09New Moon20Fri
21Sat9:4810.910:1410.33:130.53:40-0.26:235:10New Moon21Sat
22Sun10:2711.210:5110.83:530.14:17-0.56:215:11New Moon22Sun
23Mon11:0611.411:2811.14:32-0.24:55-0.66:195:13New Moon23Mon
24Tue11:4711.45:12-0.55:33-0.76:185:14Waxing Crescent24Tue
25Wed12:0811.412:3011.35:55-0.66:15-0.66:165:15Waxing Crescent25Wed
26Thu12:5111.51:1611.16:40-0.76:59-0.46:145:17Waxing Crescent26Thu
27Fri1:3711.52:0610.77:30-0.67:49-0.16:135:18Waxing Crescent27Fri
28Sat2:2911.33:0310.38:26-0.38:450.36:115:19First Quarter28Sat
29Sun3:2611.04:069.99:27-0.19:480.66:095:21First Quarter29Sun
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
Tidal Data Source: (8413564)

Common Questions About Southwest Harbor, ME Tides

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

Slack tide in Southwest Harbor, ME is approximately 3:36 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 96% 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 Waning Gibbous (96% 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