Tides Today & Tomorrow in Southwest Harbor, ME

TIDE TIMES for Friday, August 14, 2026
The tide is currently rising in Southwest Harbor, ME.
Next low tide (tomorrow) : 6:49 am (-0.8 ft)
Next high tide (tomorrow) : in 1h 28m at 12:56 am (11.9 ft)
Sunset today : 7:40 pm
Sunrise tomorrow : 5:35 am
Moon phase : Waxing Crescent (5% illuminated)
Tide Station Location : Station #8413564
Common Questions About Tides

Southwest Harbor, ME Tides - Feb 1967

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Wed3:0711.23:3710.49:01-0.29:230.16:514:42Third Quarter1Wed
2Thu4:0510.94:429.810:050.010:240.66:504:43Third Quarter2Thu
3Fri5:0810.75:519.411:120.211:291.06:494:44Third Quarter3Fri
4Sat6:1310.66:599.212:190.26:484:46Waning Crescent4Sat
5Sun7:1710.68:029.312:351.11:230.16:474:47Waning Crescent5Sun
6Mon8:1610.78:589.51:361.12:20-0.16:454:49Waning Crescent6Mon
7Tue9:0910.89:479.72:320.93:11-0.26:444:50New Moon7Tue
8Wed9:5711.010:319.83:210.73:56-0.36:434:51New Moon8Wed
9Thu10:4111.011:119.94:060.64:37-0.26:414:53New Moon9Thu
10Fri11:2110.911:4810.04:470.65:15-0.16:404:54New Moon10Fri
11Sat11:5910.75:260.65:510.16:394:55Waxing Crescent11Sat
12Sun12:249.912:3510.46:030.76:260.46:374:57Waxing Crescent12Sun
13Mon12:599.91:1310.06:410.97:000.76:364:58Waxing Crescent13Mon
14Tue1:349.81:519.67:191.07:351.06:345:00Waxing Crescent14Tue
15Wed2:129.72:339.28:001.28:141.46:335:01First Quarter15Wed
16Thu2:529.53:188.78:451.48:561.76:325:02First Quarter16Thu
17Fri3:379.44:118.49:351.59:462.06:305:04First Quarter17Fri
18Sat4:299.35:108.210:321.510:422.16:285:05First Quarter18Sat
19Sun5:279.46:138.311:341.311:442.06:275:07Waxing Gibbous19Sun
20Mon6:289.67:148.612:351.06:255:08Waxing Gibbous20Mon
21Tue7:2710.28:109.112:451.71:320.46:245:09Waxing Gibbous21Tue
22Wed8:2210.89:019.81:421.12:25-0.26:225:11Waxing Gibbous22Wed
23Thu9:1411.59:4910.52:350.53:14-0.86:215:12Full Moon23Thu
24Fri10:0412.110:3611.23:25-0.24:01-1.36:195:13Full Moon24Fri
25Sat10:5312.411:2211.74:15-0.84:47-1.66:175:15Full Moon25Sat
26Sun11:4212.45:05-1.25:33-1.66:165:16Waning Gibbous26Sun
27Mon12:0912.012:3212.25:55-1.36:21-1.36:145:17Waning Gibbous27Mon
28Tue12:5712.01:2411.76:48-1.37:10-0.96:125:19Waning Gibbous28Tue
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 3:52 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 5% 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 Waxing Crescent (5% 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