Monday, July6, 2020
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Marine Weather and Tides
South Portland, ME

Version 3.4
NOTICE
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.

Sunrise 5:05AMSunset 8:26PM Monday July 6, 2020 5:06 AM EDT (09:06 UTC) Moonrise 9:56PMMoonset 6:18AM Illumination 99% Phase: Waning Gibbous; Moon at 16 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- 337 Am Edt Mon Jul 6 2020
Today..NE winds around 5 kt, becoming se this afternoon. Seas 1 to 2 ft.
Tonight..S winds around 5 kt. Seas 1 to 2 ft. Patchy fog after midnight. Vsby variable to less than one quarter nm after midnight.
Tue..SE winds 5 to 10 kt. Seas 1 foot or less, then around 2 ft in the afternoon. Patchy fog in the morning. Vsby variable to less than one quarter nm in the morning.
Tue night..S winds 5 to 10 kt. Seas 2 to 3 ft. Patchy fog after midnight with vsby 1 to 3 nm.
Wed..S winds 5 to 10 kt. Seas 2 to 4 ft. Patchy fog in the morning. A chance of showers. Vsby 1 to 3 nm in the morning.
Wed night..SW winds 5 to 10 kt, diminishing to around 5 kt after midnight. Seas 2 to 4 ft. A chance of showers in the evening. Patchy fog after midnight with vsby 1 to 3 nm.
Thu..S winds around 5 kt. Seas around 2 ft. Patchy fog. Vsby 1 to 3 nm.
Thu night..S winds around 5 kt. Seas around 2 ft.
Fri..S winds 5 to 10 kt. Seas 2 to 3 ft.
Fri night..S winds 5 to 10 kt. Seas 2 to 4 ft.
ANZ100 337 Am Edt Mon Jul 6 2020
Synopsis for stonington me to merrimack river ma out to 25 nm.. High pressure crosses to the north today with northerly offshore breeze. It then settles over the canadian maritimes for remainder of the week with onshore flow and occasional overnight fog. A coastal system may approach the region this weekend. &&


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 060814 AFDGYX

Area Forecast Discussion National Weather Service Gray ME 414 AM EDT Mon Jul 6 2020

SYNOPSIS. High pressure builds into the region today before exiting into the Atlantic Ocean Tuesday. Heat and humidity will build by mid week, triggering daily chances for showers and afternoon thunderstorms. More widespread rainfall is in store for late in the week and into the weekend.

NEAR TERM /TODAY/. Today, a northerly breeze brings in drier and cooler air behind a departing short wave trough aloft as high pressure builds over the north into the maritimes. Low clouds and patchy fog will lift out through late morning as dry air flows in which will finally allow coastal areas to see the sun for the first time in a couple days. High temperatures range from the mid-80s over the lower Connecticut River Valley where sunshine and mixing are favored, to around 70 along the immediate coastline low level moisture scours out last.

SHORT TERM /TONIGHT THROUGH TUESDAY/. Tonight into tomorrow, upper level ridging rotates through New England with high pressure at the surface settling just south of Nova Scotia over the Atlantic. While this keeps rain chances to a minimum it also produces another period of onshore flow across the region which in turn leads to another night of low clouds between the mountains the ocean and perhaps some fog over the coast depending on how mixed the boundary layer remains. Lows rain from the mid-50s to near 60 under stratus, to around 50 over northern valleys where some radiational cooling can be realized.

Low clouds by late Tuesday morning and retreat toward the coast; how quickly this occurs dictates high temperatures. The Connecticut River Valley and other northern valleys remain unencumbered by low level onshore flow and warm into the 70s to near 80 however the coast struggles to hit 70 with the combination of clouds and persistent onshore flow. Meanwhile broad warm frontal forcing returns on the backside of the ridge axis with a few sprinkles possible over New Hampshire during the day.

LONG TERM /TUESDAY NIGHT THROUGH SUNDAY/. By mid week high pressure will push east, allowing for warm and moist return flow. A baroclinic zone will shift through the area with subtle upper level support, resulting in scattered showers and thunderstorms Wednesday and Wednesday night. PWATs during this time will surge to 1.75"+, which is above the 90% climatological moving average. Thus would need to watch for flash flooding with any convection. In fact, there will be enough moisture around to ensure afternoon showers and thunderstorms over the mountains each day through Friday.

Wednesday will also begin a warm up which will result in mid 80s to lower 90s across the area Thursday and Friday as heights rise aloft. This along with high humidity values will make it quite muggy. Overnight lows will range from the lower 60s north to the upper 60s across southern NH.

The end of the week will be interesting with a possible influence from the tropical system now spinning in the northern Gulf of Mexico. By this time significant troughing will be digging into the Great Lakes and south into the Midwest . poised to shift east. NHC has the tropical system moving over the southeastern states before possibly moving offshore near the Carolinas. With ridging over the Atlantic, it is possibly the remnant system will travel between the troughing to our west and up the eastern sea board towards the Gulf of Maine by the end of the week.

PWATs will surge again Friday and into the weekend as the trough impinges from the west and the tropical system (becoming extratropical by this point) nears. At this time it is hard to narrow down timing for what will likely be multiple waves of precipitation, but once again we will be concerned for heavy rain/flash flooding with this set up. Have generally increased PoPs during this time. Temperatures will drop several degrees with the increased cloud cover/precip chances over the weekend.

AVIATION /08Z MONDAY THROUGH FRIDAY/. Short Term . As of early this morning, patchy fog and low stratus had formed in a few river valleys and over most of region south and east of the mountains in the wake of a departing cold front. VSBY restrictions should lift as the sun rises this morning with gradual improvements to ceilings as low stratus lifts and dissipates. Stratus should scatter by about 14Z for PWM/PSM while clinging to RKD in mid-day. Winds veer NW to NE today, then onshore flow brings another period of restrictions tonight along the coast, possibly further inland with low stratus.

Long Term . Expect patchy fog Wednesday and Thursday mornings, with possible IFR for coastal sites in stratus. Scattered -TSRA is most likely for the higher terrain Wednesday and Wednesday night with a FROPA, but could bring MVFR ceilings to all terminals briefly. Prevailing VFR Thursday. Widespread -TSRA/-SHRA Friday.

MARINE. Short Term . High pressure build into the maritimes today and eventually settles east of the Gulf of Maine by tonight. Thus starts a new period of onshore flow with patchy fog possible.

Long Term . Wednesday and Wednesday night SCAs are possible outside the bays in seas around 5-6 ft. Waves increase above 5 ft for all the waters Friday through Sunday with low pressure passing near the Gulf of Maine.



GYX WATCHES/WARNINGS/ADVISORIES. ME . None. NH . None. MARINE . None.



NEAR TERM . Casey SHORT TERM . Casey LONG TERM . Hanes


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CASM1 - 8418150 - Portland, ME 3 mi48 min 61°F 62°F
44007 - PORTLAND 12 NM Southeast of Portland,ME 12 mi76 min NNE 5.8 G 7.8 60°F 61°F3 ft1014.8 hPa (+0.4)52°F
WEXM1 - Wells Reserve, ME 25 mi66 min N 5.1 63°F 63°F
WELM1 - 8419317 - Wells, ME 27 mi48 min NNE 6 G 8 62°F 65°F1015.8 hPa
44030 - Buoy B0102 - Western Maine Shelf 33 mi122 min NE 5.8 G 7.8 3 ft1020.7 hPa
44073 45 mi122 min N 5.8 G 7.8 66°F 65°F
CMLN3 45 mi182 min NW 18 62°F

Wind History for Wells, ME
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Portland, Portland International Jetport, ME1 mi75 minN 02.00 miFog/Mist62°F60°F93%1015.7 hPa

Link to 5 minute data for KPWM

Wind History from PWM (wind in knots)
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Last 24hrS3SE3SE3SE5E6E5SE6SE6SE6SE10SE10SE10SE9S5S65S3CalmCalmE3E6NE4CalmN3
1 day agoCalmNE3E4E7E6E7E8E9E9E9SE9S6S66S6S6S3S6Calm3S3S4S3S4
2 days agoE83NE6E13E11E11E8E11E13
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E10E14E8E8E4NE6NE6E5E4N4N4N3N3Calm

Tide / Current Tables for Fore River, Maine
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Fore River
Click for Map
Mon -- 12:16 AM EDT     10.94 feet High Tide
Mon -- 05:06 AM EDT     Sunrise
Mon -- 06:18 AM EDT     Moonset
Mon -- 06:44 AM EDT     -0.88 feet Low Tide
Mon -- 12:59 PM EDT     9.44 feet High Tide
Mon -- 06:50 PM EDT     0.48 feet Low Tide
Mon -- 08:24 PM EDT     Sunset
Mon -- 09:55 PM EDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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10.910.69.16.53.61-0.5-0.80.22.34.97.38.99.48.87.14.72.40.90.51.33.35.98.3

Tide / Current Tables for Cow Island, Maine
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Cow Island
Click for Map
Mon -- 12:13 AM EDT     10.94 feet High Tide
Mon -- 05:06 AM EDT     Sunrise
Mon -- 06:17 AM EDT     Moonset
Mon -- 06:42 AM EDT     -0.88 feet Low Tide
Mon -- 12:56 PM EDT     9.44 feet High Tide
Mon -- 06:48 PM EDT     0.48 feet Low Tide
Mon -- 08:24 PM EDT     Sunset
Mon -- 09:55 PM EDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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10.910.696.43.40.9-0.6-0.80.22.457.48.99.48.874.62.30.90.51.43.468.4

Weather Map
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wmap_A
GEOS Local Image of Northeast    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Gray/Portland, ME (5,6,7,8)
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Ground Weather Radar Station Portland, ME
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The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerous of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.