Tides Today & Tomorrow in Southwest Harbor, ME

TIDE TIMES for Tuesday, August 11, 2026
The tide is currently rising in Southwest Harbor, ME.
Next low tide : 3:38 pm (0.3 ft)
Next high tide : in 5h 56m at 10:03 am (10.3 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 - Oct 1972

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sun6:199.66:4110.611:591.26:316:14Waning Crescent1Sun
2Mon7:269.77:4710.612:440.41:071.16:326:12Waning Crescent2Mon
3Tue8:2610.08:4710.71:450.32:080.76:336:10Waning Crescent3Tue
4Wed9:1910.39:4010.82:400.23:030.46:346:08Waning Crescent4Wed
5Thu10:0510.710:2710.83:290.13:510.16:366:06New Moon5Thu
6Fri10:4710.911:1010.74:120.24:350.06:376:05New Moon6Fri
7Sat11:2511.011:4910.54:520.35:150.06:386:03New Moon7Sat
8Sun12:0110.95:290.65:540.16:396:01New Moon8Sun
9Mon12:2710.312:3610.86:040.96:310.36:415:59Waxing Crescent9Mon
10Tue1:0510.01:1210.66:401.27:080.56:425:58Waxing Crescent10Tue
11Wed1:429.61:4910.37:161.57:470.86:435:56Waxing Crescent11Wed
12Thu2:229.32:2910.07:551.88:291.16:445:54Waxing Crescent12Thu
13Fri3:059.03:139.88:372.19:151.36:465:52First Quarter13Fri
14Sat3:528.74:029.69:252.310:051.56:475:51First Quarter14Sat
15Sun4:458.64:579.510:192.311:001.56:485:49First Quarter15Sun
16Mon5:418.75:559.511:172.211:561.36:495:47First Quarter16Mon
17Tue6:379.06:549.812:161.86:515:46Waxing Gibbous17Tue
18Wed7:319.57:5010.212:501.01:121.36:525:44Waxing Gibbous18Wed
19Thu8:2110.28:4310.61:410.52:060.66:535:42Waxing Gibbous19Thu
20Fri9:0811.09:3411.12:300.12:57-0.26:545:41Waxing Gibbous20Fri
21Sat9:5511.710:2311.43:17-0.33:46-0.96:565:39Full Moon21Sat
22Sun10:4112.311:1211.64:03-0.64:36-1.46:575:37Full Moon22Sun
23Mon11:2812.74:51-0.75:25-1.76:585:36Full Moon23Mon
24Tue12:0311.612:1712.85:39-0.66:17-1.77:005:34Waning Gibbous24Tue
25Wed12:5411.41:0812.66:31-0.47:10-1.47:015:33Waning Gibbous25Wed
26Thu1:4911.12:0312.27:250.08:07-1.07:025:31Waning Gibbous26Thu
27Fri2:4610.63:0211.78:240.59:08-0.57:045:30Third Quarter27Fri
28Sat3:4910.24:0711.19:280.810:120.07:055:28Third Quarter28Sat
29Sun3:549.94:1510.69:351.110:180.36:064:27Third Quarter29Sun
30Mon5:019.85:2310.310:441.211:210.56:084:25Third Quarter30Mon
31Tue6:059.96:2810.211:501.06:094:24Waning Crescent31Tue
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 12:50 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