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 4h 17m 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 1982

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Fri2:448.72:519.38:421.09:130.17:144:14First Quarter1Fri
2Sat3:318.93:449.19:350.910:020.27:144:15First Quarter2Sat
3Sun4:229.14:429.010:320.710:550.37:144:16First Quarter3Sun
4Mon5:169.45:448.911:330.411:520.37:144:17First Quarter4Mon
5Tue6:149.86:509.012:370.07:144:18Waxing Gibbous5Tue
6Wed7:1410.37:549.212:530.21:40-0.57:144:19Waxing Gibbous6Wed
7Thu8:1210.88:549.51:530.02:40-1.07:144:20Waxing Gibbous7Thu
8Fri9:0811.29:519.72:50-0.33:36-1.57:134:21Full Moon8Fri
9Sat10:0311.510:479.93:46-0.54:31-1.87:134:22Full Moon9Sat
10Sun10:5811.611:4010.04:41-0.65:24-1.97:134:23Full Moon10Sun
11Mon11:5111.45:34-0.66:16-1.77:134:24Waning Gibbous11Mon
12Tue12:3210.012:4311.16:27-0.57:07-1.47:124:25Waning Gibbous12Tue
13Wed1:239.81:3610.67:20-0.27:58-1.07:124:27Waning Gibbous13Wed
14Thu2:169.62:3010.08:150.18:49-0.47:114:28Waning Gibbous14Thu
15Fri3:099.43:279.49:130.59:420.17:114:29Third Quarter15Fri
16Sat4:039.14:258.810:120.810:350.77:104:30Third Quarter16Sat
17Sun4:579.05:248.311:131.011:301.17:104:31Third Quarter17Sun
18Mon5:528.86:258.012:151.17:094:33Third Quarter18Mon
19Tue6:478.87:247.912:261.41:151.07:094:34Waning Crescent19Tue
20Wed7:398.98:188.01:221.52:090.87:084:35Waning Crescent20Wed
21Thu8:289.19:068.12:131.52:570.67:074:37Waning Crescent21Thu
22Fri9:129.39:508.32:581.33:400.37:064:38Waning Crescent22Fri
23Sat9:539.510:318.53:391.14:190.17:064:39New Moon23Sat
24Sun10:329.711:098.64:181.04:55-0.17:054:40New Moon24Sun
25Mon11:109.911:458.84:550.85:30-0.37:044:42New Moon25Mon
26Tue11:4610.05:320.66:05-0.47:034:43New Moon26Tue
27Wed12:208.912:2210.06:100.56:41-0.47:024:44Waxing Crescent27Wed
28Thu12:559.11:009.96:490.47:18-0.47:014:46Waxing Crescent28Thu
29Fri1:329.21:429.87:320.37:59-0.47:004:47Waxing Crescent29Fri
30Sat2:139.42:289.58:190.28:44-0.26:594:48Waxing Crescent30Sat
31Sun2:599.53:219.29:110.29:330.06:584:50First Quarter31Sun
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