Monday, September27, 2021
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Marine Weather and Tides
South Portland, ME

Version 3.4
NOTICE
3/30/2021 -- ANZ330 has been split into ANZ331 and ANZ332. Click EDIT in Marine Forecast and select your new zone.
1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17.
1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support.

Sunrise 6:33AMSunset 6:30PM Monday September 27, 2021 12:16 AM EDT (04:16 UTC) Moonrise 10:02PMMoonset 1:12PM Illumination 68% Phase: Waning Gibbous; Moon at 20 days in cycle
NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.
Marine Forecasts
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ANZ153 Casco Bay- 1019 Pm Edt Sun Sep 26 2021
Overnight..W winds around 10 kt. Seas 2 to 3 ft.
Mon..SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. A chance of showers in the afternoon.
Mon night..SW winds 10 to 15 kt, becoming W 5 to 10 kt after midnight. Seas 2 to 3 ft.
Tue..NW winds 5 to 10 kt, becoming N in the afternoon. Seas 2 to 3 ft.
Tue night..N winds 5 to 10 kt. Seas around 2 ft.
Wed..N winds 5 to 10 kt. Seas 1 to 2 ft.
Wed night..N winds 5 to 10 kt. Seas 1 to 2 ft.
Thu..N winds around 10 kt. Seas 1 to 2 ft. A chance of showers.
Thu night..NW winds around 10 kt. Seas around 2 ft. A chance of showers in the evening.
Fri..NW winds 5 to 10 kt. Seas 1 to 2 ft.
Fri night..N winds 5 to 10 kt. Seas around 2 ft.
ANZ100 1019 Pm Edt Sun Sep 26 2021
Synopsis for stonington me to merrimack river ma out to 25 nm.. High pressure ridging will briefly move over the waters tonight. Another cold front is set to drop towards the waters from the northwest Monday. High pressure moves towards the waters mid- week.


7 Day Forecast for Marine Location Near South Portland, ME
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location: 43.65, -70.3     debug


Area Discussion for - Gray/Portland, ME
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FXUS61 KGYX 270202 AFDGYX

Area Forecast Discussion National Weather Service Gray ME 1002 PM EDT Sun Sep 26 2021

SYNOPSIS. Cooler, more seasonal conditions are expected through the middle of the week. Variably cloudy conditions and the chance for scattered showers continue mid-week as a upper level low drifts over the area. It is unlikely any single day will be a washout, but there will be a threat for several rounds of showers through the week.

NEAR TERM /UNTIL 6 AM MONDAY MORNING/. 10 PM Update . Just a few minor adjustments to the going forecast at this time but nothing major. Forecast remains on track.

645 PM Update . Little change to the going forecast this evening. Mostly clear skies continue for most locations except for the CT Valley where stratocu continues to stream across. Winds will continue to gradually diminish.

Previously .

The front which had been stalled across the eastern portion of the area has finally moved through. In its wake we have seen gusty NWly winds develop with generally clear skies.

Overnight as the drier air moves in expect temperatures to drop quite a bit lower than the previous nights with mid 40s across the bulk of the area. Have dropped temps just a bit towards the cold side of the guidance spread in the normal valley cold spots. Do expect some fog formation in the CT river valley in the early morning hours.

SHORT TERM /6 AM MONDAY MORNING THROUGH MONDAY NIGHT/. Tomorrow, zonal flow around the upper level low over Quebec will continue, with another short wave approaching in the afternoon. The result will be clear skies to start with an increasing chance for showers in the later afternoon. This weak front falls apart as it tries to push into the northern portion of the forecast area and expect overall little accumulation with this front, especially south of the mountains.

LONG TERM /TUESDAY THROUGH SUNDAY/. Hemispheric 500 Mb flow continues to be blocky, especially across the CONUS E into Europe. During the course of the week, the flow begins to flatten across Asia and the Pacific as the blocks strengthen up a bit before they start to flatten a bit next weekend. This will initially allow 500 mb closed low to develop to our N early in the week and then meander slowly S over the area mid-late week. This will bring us seasonally cool temps with highs in the 60s and lows in the 40s across much of the area. There will also be a few rounds of clouds and maybe showers as waves of energy rotate around that closed low. Could see some improvement late in the weekend, but the better chance is over the weekend.

Tuesday will be the warmest day as coolest air comes in Tuesday night after wave passes main to our S. Highs range from around 60 in the mtns, where there will be more clouds, to the upper 60s in the S. It gets cooler Tue night, and winds will die off as well, but not sure how cold it will get given the potential for clouds and a persistent NW boundary layer flow. Still lows in the upper 30s in the mountains are reasonable, and ranging to the mid-upper 40s in the S. Highs on Wed will be cooler as the core of the cool air moves in overhead. Wed may be the sunniest day of the mid-late week with highs 55-60 in the mtns to the mid 60s in the S. Thu-Fri will see more in the way of clouds, although downslope flow likely will keep the coastal plain partly sunny. Temps both day will feature highs in the upper 50s to mid 60s, and lows in the upper 30s to upper 40s.

AVIATION /02Z MONDAY THROUGH FRIDAY/. Short Term . VFR conditions under NWLy flow dominate the area as the front has moved off to our east. Overnight valley fog is again likely in the CT river valley bringing LEB and HIE to IFR while elsewhere conditions hold VFR.

VFR remains through the day tomorrow, with increasing clouds by late afternoon in the north bringing a chance for showers and MVFR.

Long Term . Mainly VFR Tue-Fri, with some periods of MVFR cigs and showers, most common at KHIE.

MARINE. Short Term . Have cancelled the SCA for the overnight hours and for Monday morning as seas are marginal and coming down. However, it remains in effect for Monday afternoon and night for gusts around 25 kt and seas building to 5, perhaps 6 feet on the outer waters.

Long Term . Winds/seas generally forecast to stay below SCA thresholds Tue-Fri.

GYX WATCHES/WARNINGS/ADVISORIES. ME . None. NH . None. MARINE . Small Craft Advisory from 2 PM Monday to 6 AM EDT Tuesday for ANZ150-152-154.



NEAR TERM . Ekster SHORT TERM . Curtis LONG TERM . Cempa


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CASM1 - 8418150 - Portland, ME 3 mi47 min 58°F 64°F
44007 - PORTLAND 12 NM Southeast of Portland,ME 12 mi27 min W 16 G 19 62°F 64°F4 ft1009.3 hPa52°F
WEXM1 - Wells Reserve, ME 25 mi77 min WSW 4.1 56°F 47°F
WELM1 - 8419317 - Wells, ME 27 mi47 min W 7 G 9.9 57°F 67°F1010.7 hPa
44030 - Buoy B0102 - Western Maine Shelf 33 mi73 min W 14 G 18 62°F 65°F4 ft1010.8 hPa

Wind History for Wells, ME
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Portland, Portland International Jetport, ME1 mi26 minN 010.00 miFair53°F48°F83%1010.1 hPa

Link to 5 minute data for KPWM

Wind History from PWM (wind in knots)
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Last 24hrN3NW7NW4CalmCalmW4W3N5NW8NW3NW7N10
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1 day agoSW3W3CalmN4NW3N3N5N4N5NE6E5NE3E3E4E8E7E6E4S3SE3CalmCalmCalmW5
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Tide / Current Tables for Fore River, Maine
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Fore River
Click for Map
Mon -- 04:00 AM EDT     8.13 feet High Tide
Mon -- 06:34 AM EDT     Sunrise
Mon -- 09:54 AM EDT     1.86 feet Low Tide
Mon -- 01:12 PM EDT     Moonset
Mon -- 04:07 PM EDT     8.77 feet High Tide
Mon -- 06:28 PM EDT     Sunset
Mon -- 10:01 PM EDT     Moonrise
Mon -- 10:34 PM EDT     1.30 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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34.86.57.78.17.86.753.42.21.92.33.55.26.98.28.88.57.45.83.92.31.41.4

Tide / Current Tables for Cow Island, Maine
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Cow Island
Click for Map
Mon -- 03:57 AM EDT     8.13 feet High Tide
Mon -- 06:33 AM EDT     Sunrise
Mon -- 09:52 AM EDT     1.86 feet Low Tide
Mon -- 01:12 PM EDT     Moonset
Mon -- 04:04 PM EDT     8.77 feet High Tide
Mon -- 06:28 PM EDT     Sunset
Mon -- 10:01 PM EDT     Moonrise
Mon -- 10:32 PM EDT     1.30 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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34.96.67.88.17.76.653.32.21.92.43.65.378.38.88.47.45.73.82.31.41.4

Weather Map
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NOTE: This section has been updated as of 1/26/2021. If the image you are expecting is not showing, please let me know. You may use the EDIT function to update your location.
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