Tides Today & Tomorrow in Portland, ME

TIDE TIMES for Tuesday, August 11, 2026
The tide is currently falling in Portland, ME.
Next low tide : in 4h 16m at 4:19 pm (0.2 ft)
Next high tide : 10:39 pm (11.1 ft)
Sunset today : 7:50 pm
Sunrise tomorrow : 5:41 am
Moon phase : New Moon (2% illuminated)
Tide Station Location : Station #8418150
Common Questions About Tides

Portland, ME Tides - Jan 1945

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Mon1:419.11:4610.17:320.68:10-0.48:145:14Waning Gibbous1Mon
2Tue2:258.92:309.78:170.88:530.08:145:15Waning Gibbous2Tue
3Wed3:108.73:159.39:031.19:370.48:145:16Waning Gibbous3Wed
4Thu3:568.54:048.89:521.410:230.78:145:17Third Quarter4Thu
5Fri4:448.44:558.410:441.511:091.08:145:18Third Quarter5Fri
6Sat5:328.45:498.111:381.611:571.38:145:19Third Quarter6Sat
7Sun6:228.46:457.812:341.68:145:20Third Quarter7Sun
8Mon7:128.57:447.812:471.51:321.58:145:21Waning Crescent8Mon
9Tue8:038.78:397.81:401.62:281.18:135:22Waning Crescent9Tue
10Wed8:529.19:308.12:311.53:180.78:135:23Waning Crescent10Wed
11Thu9:379.410:178.33:191.34:030.38:135:24Waning Crescent11Thu
12Fri10:219.911:018.64:041.04:47-0.28:125:26New Moon12Fri
13Sat11:0410.311:459.04:480.65:30-0.68:125:27New Moon13Sat
14Sun11:4810.65:330.36:13-1.08:125:28New Moon14Sun
15Mon12:289.312:3410.96:180.06:57-1.28:115:29New Moon15Mon
16Tue1:139.51:2011.07:06-0.27:43-1.38:115:30Waxing Crescent16Tue
17Wed1:589.72:0810.97:55-0.38:30-1.38:105:32Waxing Crescent17Wed
18Thu2:479.83:0010.68:47-0.39:20-1.18:095:33Waxing Crescent18Thu
19Fri3:399.93:5710.19:43-0.310:13-0.78:095:34First Quarter19Fri
20Sat4:349.94:589.610:44-0.111:09-0.38:085:35First Quarter20Sat
21Sun5:329.96:029.211:480.08:075:37First Quarter21Sun
22Mon6:339.97:108.912:090.112:550.08:075:38First Quarter22Mon
23Tue7:369.98:198.71:120.42:04-0.18:065:39Waxing Gibbous23Tue
24Wed8:3810.09:228.82:170.63:08-0.38:055:41Waxing Gibbous24Wed
25Thu9:3610.110:188.93:170.64:05-0.58:045:42Waxing Gibbous25Thu
26Fri10:2910.311:099.04:120.54:56-0.78:035:43Full Moon26Fri
27Sat11:1810.311:569.15:020.45:44-0.78:025:45Full Moon27Sat
28Sun12:0310.35:490.36:27-0.78:015:46Full Moon28Sun
29Mon12:409.112:4610.16:320.47:07-0.58:005:47Full Moon29Mon
30Tue1:209.11:269.97:130.47:45-0.37:595:49Waning Gibbous30Tue
31Wed1:589.02:059.67:530.68:210.07:585:50Waning Gibbous31Wed
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
Tidal Data Source: (8418150)

Common Questions About Portland, ME Tides

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What time does the tide turn (slack tide) in Portland, ME today?

Slack tide in Portland, ME is approximately 7:29 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 Portland, ME?

Portland, 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 Portland, 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 Portland, ME?

Tide predictions for Portland, 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 Portland, ME?

Tide data for Portland, ME is sourced from NOAA Station #8418150. View the official NOAA station page at https://tidesandcurrents.noaa.gov/stationhome.html?id=8418150.

What is the moon phase in Portland, ME tonight?

Tonight the moon over Portland, ME is New Moon (2% illuminated). This places Portland, 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