Nearby Harbors
43.6537’ N, 70.2487’ W

Portland, ME

61°
H -°
L 58°
NNE
4mph
High tide
4:04 am
Photo Credits

Tides Today & Tomorrow in Portland, ME

TIDE TIMES for Thursday, September 17, 2026
The tide is currently rising in Portland, ME.
Next low tide : 9:56 am (1.7 ft)
Next high tide : in 2h 25m at 4:04 am (8.3 ft)
Sunset today : 6:47 pm
Sunrise tomorrow : 6:22 am
Moon phase : First Quarter (39% illuminated)
Tide Station Location : Station #8418150
Common Questions About Tides

Featured Local Businesses

USCG Station South Portland, ME
Maine Yacht Center docks, Portland, Maine

Maine Yacht Center
Sunset, calm water and the islands on the Maine Island Trail

Maine Island Trail Association (MITA)
Freedom Boat Club at Yarmouth Boat Yard, Maine

Freedom Boat Club of Maine
Yarmouth Boat Yard is an authorized Pursuit Boats dealer

Yarmouth Boat Yard
Hamilton Marine - Portland

Hamilton Marine - Portland
Casco Bay Boat Transport

Casco Bay Boat Transport

Portland, ME Tides - Jun 1870

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Common Questions About Portland, ME Tides

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Is this week a spring tide or neap tide in Portland, ME?

Portland, ME is currently in a transitional phase. Tonight's moon is 39% 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 shifting between spring and neap.

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 (39% illuminated). This places Portland, ME in a transitional tide cycle, so tidal ranges are shifting between spring and neap 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

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