Marine Weather and Tides
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
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|Sunrise 5:38AM||Sunset 7:36PM||Monday April 24, 2017 9:16 AM EDT (13:16 UTC)||Moonrise 4:55AM||Moonset 5:25PM||Illumination 3%|
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|ANZ153 Casco Bay- 649 Am Edt Mon Apr 24 2017 |
.small craft advisory in effect from Tuesday evening through Wednesday afternoon...
Today..N winds around 5 kt...becoming se this afternoon. Seas 1 to 2 ft.
Tonight..E winds around 5 kt. Seas 1 to 2 ft.
Tue..NE winds 5 to 10 kt...becoming E 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 1 to 2 ft...building to 2 to 3 ft in the afternoon. Rain likely... Mainly in the afternoon.
Tue night..E winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. Rain in the evening...then rain with patchy drizzle after midnight. Patchy fog after midnight.
Wed..SE winds 5 to 10 kt. Seas 3 to 5 ft... Building to 4 to 7 ft in the afternoon. Patchy drizzle. Rain. Patchy fog.
Wed night..SE winds 5 to 10 kt. Seas 4 to 6 ft. Patchy drizzle. Rain. Patchy fog.
Thu..SE winds around 5 kt. Seas 3 to 5 ft. A chance of rain with patchy drizzle. Patchy fog.
Thu night..S winds around 5 kt. Seas 3 to 5 ft. A chance of rain.
Fri..S winds 5 to 10 kt. Seas 2 to 4 ft. A chance of showers.
Fri night..SW winds 5 to 10 kt. Seas 2 to 4 ft. A chance of showers.
|ANZ100 649 Am Edt Mon Apr 24 2017 |
Synopsis for stonington me to merrimack river ma out to 25 nm.. A weak cold front will settle over the waters today. An onshore flow develops later today which will strengthen as low pressure moves up the east coast Tuesday into Wednesday...tracking near the gulf of maine on Wednesday. A cold front will approach from the west Thursday, before crossing the waters Friday.
7 Day Forecast for Marine Location Near Bowdoinham, MEHourly EDIT Help
Area Discussion for - Gray/Portland, ME  (on/off)  Help NOTE: mouseover dotted underlined text for definition
|Fxus61 kgyx 241052|
area forecast discussion
national weather service gray me
652 am edt Mon apr 24 2017
A cold front will drop south into northern new england today
and stall. Low pressure will slowly move up the eastern seaboard
Tuesday and Wednesday with rain. A cold front will slowly
approach from the west Thursday into Friday, before finally
crossing the region on Saturday.
Near term /until 6 pm this evening/
Patchy fog early this morning will dissipate around sunrise in
the valleys of south-central new hampshire.
A weak cold front will continue to slowly press southward this
morning across the northern and central portions of our forecast
area. This front remains relatively moisture starved with little
if any precipitation expected and will likely dissipate later
today over the region.
With plenty of sunshire, especially over southern areas,
temperatures will climb through the 60s. A couple locations over
southern new hampshire will nudge 70 degrees. Along the coast,
winds will become onshore leading to temperatures falling the
through 50s during the afternoon.
Short term /6 pm this evening through 6 pm Tuesday/
have updated the grids to account for current conditions. Some
patchy fog continues over southwest new hampshire with patchy
fog being reported at times in rockland as well. This fog will
mix out quickly this morning.
Have adjusted temperatures per current observations and raised
today's forecast MAX readings by a couple degrees as plenty of
sunshine will allow for some readings in the lower 70s across
southern new hampshire today. A sea breeze will lead to lowering
temperatures along the coast this afternoon.
a coastal low pressure system will reach the north
carolina tonight. A large area of high pressure will remain over
the northern maine acting as a blocking pattern and keeping
precipitation from advecting up the coast and into our area.
By Tuesday, this surface high will retreat to the canadian
maritimes as low pressure slowly moves towards the mid atlantic
region. 00z model suite is in relatively good agreement with
the positioning of this system. Model ensembles are in very good
agreement as well with the upper level low pressure system
gradually opening up and moving northeast with time.
An onshore flow will allow for rain and perhaps some drizzle to
enter the region with the gradient being created by the exiting
surface high as much as the approaching weak area of low
Long term /Tuesday night through Sunday/
A coastal low moving slowly northeast up the east coast of the
u.S. Will bring rain Tue night into early thu. All models agree
on the track of this system moving over eastern new england by
Thursday and spreading heavy rain at times with QPF totals to
range between 1-2 inches. An persistent onshore flow will keep
temps cool and damp through Thursday. See tides/coastal flooding
section below regarding coastal effects.
The system finally moves off to the east by late Thursday
slowly bringing an end to the rain from west to east. With lack
of any dry ventilation following this system, the low level
moisture will likely linger and not much in the way of clearing
expected into early Friday.
Some partial clearing should take place during the day Friday
with warmer temperatures as the flow aloft and in the lower
levels becomes southwest ahead of an approaching upper short
wave helping clear out much of the moisture. The short wave
moves through during the afternoon so some scattered convection should|
A broad bermuda high setup develops over the weekend but along
its northern periphery over northern new england, models are
showing a broad area of overrunning rain to develop.
Aviation /12z Monday through Friday/
Short term...VFR conditions are expected today and tonight. We
may start to see some MVFR CIGS develop across southern nh and
coastal me late Monday night.
Long term... Ifr to lifr conditions expected Tue night into
early Thursday. Conditions improve by late Thu to MVFR from west
to east and then mainlyVFR by fri.
Short term... A brief period of marginal SCA conditions will be
possible tonight in advance of a cold front. However,
probability is pretty low, so will hold off an advisory at this
time. Otherwise sub-sca conditions are expected through Monday
Long term... A prolonged weak onshore easterly flow will
generate wave heights 5 to 9 ft by Tuesday night into Wednesday
and potentially staying above 5 ft into Friday.
Rh values will be generally between 35 and 45 percent tonday
with relatively light winds. Rain is expected to develop tue
and last into Wed and thu.
We are expecting 1-2 inches of rain with locally higher amounts from
Tuesday into early Thursday. With snowmelt and the additional
rainfall, river rises will be possible with the chance of some
localized minor flooding.
We are entering a period of high astronomical tides which will
coincide in part with the weak storm system moving up the coast.
There are two primary tides we are monitoring for minor coastal
flooding, Tuesday evening and Wednesday evening, though high
water conditions may continue during the high tides into the
For Tuesday night the astronomical tide at portland is 11 ft.
Winds over the waters will be out of the east at about 20 kt
with nearshore waves building to 5 or 8 ft. This would lead to
about a 1 ft surge along coastal new hampshire and southwest
maine and create the potential for minor coastal flooding,
splash over, and beach erosion.
The tide Wednesday night is 11.5 ft at portland. At this time
winds will be out of the southeast at about 15 to 20 kt which
will not promote a strong surge on its own but will likely keep
a residual surge in the gulf of maine of up to 1 ft with waves
of 5 to 9 ft. Minor coastal flooding, splash over, and beach
erosion is possible with this tide as well.
The next two tidal cycles will see tides of 11.7 ft at portland
Thursday night and Friday night, but atmospheric conditions
contributing to storm surge will be on the decrease and we are
not expecting significant issues with these tides.
Marine... Small craft advisory from 7 pm Tuesday to 6 pm edt Wednesday
Small craft advisory from 2 pm Tuesday to 6 pm edt Wednesday
Near term... Cannon
short term... Cannon
long term... Marine
Weather Reporting StationsEDIT (on/off)  Help NOTE: Click on distance to see the station location on a map
|Stations||Dist||Age||Wind||Air Temp||Water Temp||Waves||Pressure||DewPt|
|CASM1 - 8418150 - Portland, ME||31 mi||46 min||48°F||44°F||1021.2 hPa|
|44032 - Buoy E0104 - Central Maine Shelf||35 mi||72 min||NNE 3.9 G 3.9||43°F||42°F||3 ft||1020.4 hPa|
|44007 - PORTLAND 12 NM Southeast of Portland,ME||36 mi||86 min||Calm G 1.9||46°F||44°F||3 ft||1020.6 hPa (+2.6)||43°F|
|44033 - Buoy F0103 - West Penobscot Bay||48 mi||72 min||SSW 1.9 G 1.9||46°F||41°F||2 ft||1020.1 hPa|
Wind History for Wells, ME(wind in knots) EDIT (on/off)  Help
Airport ReportsEDIT (on/off)  Help Click EDIT to display multiple airports
|Wiscasset Airport, ME||11 mi||23 min||E 4||10.00 mi||Fair||54°F||42°F||64%||1021.5 hPa|
|Auburn-Lewiston, ME||21 mi||20 min||N 0||10.00 mi||Fair||50°F||39°F||68%||1022.9 hPa|
|Augusta, Augusta State Airport, ME||22 mi||23 min||N 5||10.00 mi||Fair||52°F||37°F||57%||1021.5 hPa|
Wind History from IWI (wind in knots)
|1 day ago||Calm||E||NE||E||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm|
|2 days ago||E||E||E||E||E||E||E||E||E|
EDIT RT Ports Option Weekend mode (on/off) (on/off)  Help One Week of Data
Click for Map
Mon -- 12:08 AM EDT 6.15 feet High Tide
Mon -- 04:55 AM EDT Moonrise
Mon -- 05:41 AM EDT Sunrise
Mon -- 06:26 AM EDT 0.02 feet Low Tide
Mon -- 12:30 PM EDT 6.27 feet High Tide
Mon -- 05:24 PM EDT Moonset
Mon -- 06:47 PM EDT -0.19 feet Low Tide
Mon -- 07:34 PM EDT Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
EDIT (on/off)  Help One Week of Data
|Upper Hell Gate (Sasanoa River |
Click for Map
Mon -- 02:21 AM EDT -0.00 knots Slack
Mon -- 04:27 AM EDT -0.94 knots Max Ebb
Mon -- 04:54 AM EDT Moonrise
Mon -- 05:41 AM EDT Sunrise
Mon -- 08:00 AM EDT 0.00 knots Slack
Mon -- 10:40 AM EDT 0.99 knots Max Flood
Mon -- 02:39 PM EDT -0.00 knots Slack
Mon -- 04:49 PM EDT -1.02 knots Max Ebb
Mon -- 05:23 PM EDT Moonset
Mon -- 07:34 PM EDT Sunset
Mon -- 08:16 PM EDT 0.00 knots Slack
Mon -- 11:06 PM EDT 1.14 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Weather Map and Satellite Images(on/off)  Help
|Weather Map ||IR Satellite Image from GEOS|
GOES Local Image of Northeast EDIT
Wind Forecast for Gray/Portland, ME (9,2,3,4)(on/off)  Help
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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 numerious 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.