Tides Today & Tomorrow in Portland, ME

TIDE TIMES for Tuesday, July 21, 2026
The tide is currently falling in Portland, ME.
Next low tide (tomorrow) : in 3h 33m at 12:03 am (0.9 ft)
Next high tide (tomorrow) : 6:13 am (8.4 ft)
Sunset today : 8:15 pm
Sunrise tomorrow : 5:19 am
Moon phase : First Quarter (52% illuminated)
Tide Station Location : Station #8418150
Common Questions About Tides

Portland, ME Tides - Jan 2070

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Wed1:559.82:0910.17:560.08:27-0.57:144:15Waning Gibbous1Wed
2Thu2:479.53:049.58:510.49:190.07:144:16Third Quarter2Thu
3Fri3:409.34:008.99:480.710:110.67:144:16Third Quarter3Fri
4Sat4:339.14:588.410:471.011:041.07:144:17Third Quarter4Sat
5Sun5:278.95:578.111:471.111:591.37:144:18Third Quarter5Sun
6Mon6:218.96:568.012:471.17:134:19Waning Crescent6Mon
7Tue7:158.97:528.012:551.41:440.97:134:20Waning Crescent7Tue
8Wed8:059.18:418.11:481.42:330.77:134:22Waning Crescent8Wed
9Thu8:509.39:268.32:351.33:170.47:134:23Waning Crescent9Thu
10Fri9:329.610:088.63:171.13:570.17:124:24New Moon10Fri
11Sat10:129.810:478.83:570.94:34-0.17:124:25New Moon11Sat
12Sun10:5010.011:248.94:350.75:10-0.37:124:26New Moon12Sun
13Mon11:2710.15:130.55:45-0.57:114:27New Moon13Mon
14Tue12:009.112:0410.25:510.36:21-0.67:114:28Waxing Crescent14Tue
15Wed12:369.312:4310.16:320.27:00-0.67:104:30Waxing Crescent15Wed
16Thu1:149.51:2510.07:150.17:41-0.67:104:31Waxing Crescent16Thu
17Fri1:569.62:119.88:020.08:26-0.57:094:32Waxing Crescent17Fri
18Sat2:439.73:039.58:540.09:16-0.27:094:33First Quarter18Sat
19Sun3:349.84:019.29:500.010:100.07:084:35First Quarter19Sun
20Mon4:319.95:048.910:510.011:090.27:074:36First Quarter20Mon
21Tue5:329.96:128.811:57-0.17:064:37Waxing Gibbous21Tue
22Wed6:3710.17:228.912:130.31:06-0.37:064:38Waxing Gibbous22Wed
23Thu7:4210.48:269.21:200.22:11-0.77:054:40Waxing Gibbous23Thu
24Fri8:4310.79:249.52:23-0.13:09-1.17:044:41Waxing Gibbous24Fri
25Sat9:3911.010:189.83:20-0.34:03-1.47:034:42Full Moon25Sat
26Sun10:3211.111:0810.04:15-0.64:54-1.57:024:44Full Moon26Sun
27Mon11:2211.111:5610.15:06-0.75:41-1.47:014:45Full Moon27Mon
28Tue12:1010.85:55-0.76:27-1.27:004:46Waning Gibbous28Tue
29Wed12:4110.012:5610.46:43-0.57:10-0.86:594:48Waning Gibbous29Wed
30Thu1:269.91:429.97:30-0.27:54-0.36:584:49Waning Gibbous30Thu
31Fri2:109.62:309.38:180.28:380.26:574:51Waning Gibbous31Fri
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 3:08 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 Portland, ME?

Portland, ME is currently in a neap phase. Tonight's moon is 52% 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 minimum.

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 First Quarter (52% illuminated). This places Portland, ME in a neap tide cycle, so tidal ranges are near their weekly minimum 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