Marine Weather and Tides
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
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.
|Sunrise 5:10AM||Sunset 8:10PM||Wednesday May 24, 2017 12:05 AM EDT (04:05 UTC)||Moonrise 4:39AM||Moonset 6:43PM||Illumination 2%|
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|ANZ251 Massachusetts Bay And Ipswich Bay- 717 Pm Edt Tue May 23 2017 |
Tonight..SE winds 5 to 10 kt. Seas 1 foot or less. Patchy fog after midnight. A slight chance of rain after midnight with vsby 1 to 3 nm.
Wed..NE winds 5 to 10 kt. Seas 1 foot or less.
Wed night..E winds 5 to 10 kt. Seas around 2 ft.
Thu..E winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. Showers likely.
Thu night..E winds 10 to 15 kt with gusts up to 25 kt. Seas 3 to 5 ft. Showers. Vsby 1 to 3 nm.
Fri..N winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. Showers. Vsby 1 to 3 nm.
Fri night..NW winds 5 to 10 kt. Gusts up to 20 kt in the evening. Seas 3 to 5 ft. A chance of showers.
Sat..NW winds 5 to 10 kt. Seas around 2 ft.
Sat night..S winds 5 to 10 kt. Seas around 2 ft.
Sun..SE winds 5 to 10 kt. Seas around 2 ft.
Sun night..E winds 5 to 10 kt. Seas 2 to 4 ft. A chance of showers. Vsby 1 to 3 nm. Seas are reported as significant wave height...which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height.
|ANZ200 717 Pm Edt Tue May 23 2017 |
Synopsis for massachusetts and rhode island coastal waters.. Another coastal low will move across the benchmark tonight followed by another high pressure system on Wednesday. A potent low pressure system will move over the area late Thursday into Friday. Followed by quiet weather for the weekend. For information on possible hazardous weather beyond the 24-36 hour forecast period...please visit www.weather.gov/boston and follow the current hazards link above the map on the left.
7 Day Forecast for Marine Location Near Seabrook Beach, NHHourly EDIT Help
Area Discussion for - Gray/Portland, ME  (on/off)  Help NOTE: mouseover dotted underlined text for definition
|Fxus61 kgyx 240232|
area forecast discussion
national weather service gray me
1032 pm edt Tue may 23 2017
Weak high pressure will hold over the region through Wednesday as
low pressure passes well offshore. A complex area of low pressure
will approach from the southwest Wednesday night and Thursday and
will slowly move northeast through southern new england and the gulf
of maine Thursday night and Friday. High pressure will build in from
the west Friday night and Saturday. A cold front will drop south
through the region Saturday night and Sunday.
Near term until 6 am Wednesday morning
have issued a quick update to account for current observational
trends and mesoscale models. Cs shield has expanded to central
areas and is opaque in many areas, while skies remain mainly
clear over northern areas. With this cloud cover, have backed
off on some of the fog forecast for late tonight and primarily
will focus on patchy for over northern areas which are mainly
clear as of 0230z.
Widespread 40s expected for overnight lows tonight. No signs of
marine stratus as of late this evening.
a stratus deck has moved offshore but it did take a
while for coastal locations to clear out today. After some
clearing over the coastal plain and variable Sun across the
area, moderately dense cirrus blow off from the west has covered
southern nh and much of western maine. Elsewhere cumulus had
developed over the mountains. All this developed in wsw weak
ridging aloft and in advance of a warm front over the great
Expect more cloudy skies tonight with light and variable winds.
Overnight lows will range from the mid 40s to mid 50s.
Short term 6 am Wednesday morning through Wednesday night
Wednesday will be similar to today but with increasing moisture
due to an increased onshore flow. We'll see a weak sea breeze
develop tomorrow afternoon with low pressure passing well south of
the gulf of maine. That said there may be a stray shower associated
with this low across southern nh or SW maine. In addition, isolated
mountain showers are possible as the elevated warm front nears
tomorrow. Highs will generally be in the lower to mid 70s. Overnight
lows will be a little warmer for northern zones in the upper 40s
with lower 50s to the south.
Long term Thursday through Tuesday
A broad upper level ridge currently over the eastern portion of the
us will shift eastward as the trough moves through the midwest and
onto the east coast. This will set us up for an active pattern with
a series of waves moving along the upper low and up the east coast.
Thursday will start off partly sunny but quickly cloud over as|
low pressure develops to our south and moves up the east coast.
This storm will deepen and pass across CAPE cod on Friday
bringing widespread rain. While there is a fairly good consensus
there will be a coastal low, the strength of the storm is still
seeing quite a bit of spread with QPF amounts as high as 2
inches possible along the coast for the stronger solution and as
low as 0.5 inch. Have leaned a bit on the higher QPF both due
to favoring the stronger solution and because of the long
tropical fetch for the moisture source.
The storm departs into the maritimes on Saturday with some
scattered upslope showers. Saturday afternoon and evening will
be a brief break from the rain. The next low will move through the
great lakes on Sunday pushing a warm front and overunning
precipitation through the area Sunday night. Another coastal low
will spin up on Monday pushing another round of widespread
precipitation through to start the week.
Aviation 03z Wednesday through Sunday
Short term...VFR conditions will prevail with some possible
ifr MVFR in low stratus and fog once again near rkd... Aug... And pwm
late tonight into Wednesday morning. A low deck is lurking just
offshore and should move back towards shore tonight. Additional fog
or drizzle is possible late Wednesday night into Thursday morning.
Long term... Thursday will begin withVFR and MVFR but rapidly drop
to ifr on Thursday night as low pressure approaches the region. Ifr
with rain and fog will continue through the day on Friday with gusty
winds along the coast. Conditions will improve toVFR with MVFR
ceilings in the mountains for Saturday.
Short term... Conditions should remain below SCA thresholds today
through early Thursday morning.
a coastal low will cross the waters on Thursday into Friday with
small craft advisories likely and gale force winds possible ahead of
the storm. Winds and seas will subside on Saturday and remain fairly
calm through the start of next week.
Tides coastal flooding
In addition to the potential for a lot of rain on Friday morning,
the easterly flow and winds associated with a coastal low will
create a risk for coastal flooding. Onshore flow will develop
Thursday ahead of the storm and strengthen through the day on
Friday. This will result in a storm surge of around 0.5 ft Thursday
night. The highest tides of the year will occur Friday, with the
onshore component plus the storm surge resulting in coastal flooding.
Gyx watches warnings advisories
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|
|IOSN3 - Isle of Shoals, NH||9 mi||66 min||SSW 13 G 13||55°F||1009.4 hPa (+0.3)||51°F|
|BGXN3 - Great Bay Reserve, NH||20 mi||81 min||E 1||53°F||1010 hPa||52°F|
|44029 - Buoy A0102 - Mass. Bay/Stellwagen||21 mi||122 min||S 9.7 G 12||55°F||54°F||2 ft||1009.1 hPa|
|44098 - Jeffrey's Ledge, NH (160)||24 mi||60 min||51°F||2 ft|
|44030 - Buoy B0102 - Western Maine Shelf||26 mi||122 min||SSW 9.7 G 12||54°F||53°F||2 ft||1009.2 hPa|
|WELM1 - 8419317 - Wells, ME||34 mi||48 min||Calm G 1.9||50°F||1009.6 hPa|
|44013 - BOSTON 16 NM East of Boston, MA||34 mi||76 min||S 7.8 G 9.7||55°F||54°F||1 ft||1009.2 hPa (+0.0)|
|WEXM1 - Wells Reserve, ME||35 mi||66 min||Calm||50°F||50°F|
|BHBM3 - 8443970 - Boston, MA||40 mi||48 min||61°F||54°F||1009.7 hPa|
Wind History for Wells, ME(wind in knots) EDIT (on/off)  Help
Airport ReportsEDIT (on/off)  Help Click EDIT to display multiple airports
|Pease Air Force Base / Portsmouth, NH||21 mi||8 min||N 0||10.00 mi||Overcast||53°F||51°F||94%||1009.5 hPa|
|Beverly, Beverly Municipal Airport, MA||24 mi||13 min||N 0||10.00 mi||Fair||53°F||51°F||93%||1009 hPa|
Wind History from PSM (wind in knots)
|1 day ago||SW||SW||S||Calm||SW||Calm||SW||Calm||Calm||Calm||SE||S||S||S||S||S||SE||SE||SE||E||E||SE||Calm||E|
|2 days ago||N||NW||NE||NE||NE||N||N||NE||NE||E||E||SE||S||SE||S||S||SE||SE||SE||S||SE||Calm|
EDIT RT Ports Option Weekend mode (on/off) (on/off)  Help One Week of Data
|Gosport Harbor |
Click for Map
Wed -- 04:06 AM EDT -0.78 feet Low Tide
Wed -- 04:39 AM EDT Moonrise
Wed -- 05:11 AM EDT Sunrise
Wed -- 10:22 AM EDT 9.46 feet High Tide
Wed -- 04:21 PM EDT -0.49 feet Low Tide
Wed -- 06:42 PM EDT Moonset
Wed -- 08:08 PM EDT Sunset
Wed -- 10:40 PM EDT 10.65 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
EDIT (on/off)  Help One Week of Data
|Newburyport (Merrimack River) |
Click for Map
Wed -- 01:43 AM EDT -1.73 knots Max Ebb
Wed -- 04:40 AM EDT Moonrise
Wed -- 05:12 AM EDT Sunrise
Wed -- 05:30 AM EDT 0.00 knots Slack
Wed -- 09:15 AM EDT 1.84 knots Max Flood
Wed -- 11:32 AM EDT -0.00 knots Slack
Wed -- 02:06 PM EDT -1.68 knots Max Ebb
Wed -- 05:47 PM EDT 0.00 knots Slack
Wed -- 06:43 PM EDT Moonset
Wed -- 08:08 PM EDT Sunset
Wed -- 09:36 PM EDT 1.94 knots Max Flood
Wed -- 11:56 PM EDT -0.00 knots Slack
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 (0,6,7,8)(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.