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Marine Weather and Tides
Version 3.4 |
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. 6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen |
| Sunrise 6:55AM | Sunset 5:57PM | Friday October 18, 2019 8:19 PM EDT (00:19 UTC) | Moonrise 9:06PM | Moonset 11:29AM | Illumination 72% |  |
ANZ231 Cape Cod Bay- 717 Pm Edt Fri Oct 18 2019
.small craft advisory in effect until 8 pm edt this evening...
Tonight..NW winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 25 kt. Seas around 4 ft.
Sat..NW winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt in the afternoon. Seas around 3 ft.
Sat night..W winds around 5 kt. Seas around 2 ft.
Sun..S winds around 5 kt. Seas 1 foot or less.
Sun night..E winds 5 to 10 kt. Seas 1 foot or less, then around 2 ft after midnight.
Mon..NE winds 5 to 10 kt. Seas around 2 ft.
Mon night..NE winds 10 to 15 kt. Gusts up to 20 kt after midnight. Seas around 3 ft.
Tue..E winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. A chance of showers.
Tue night..SE winds 10 to 15 kt with gusts up to 25 kt. Seas 3 to 4 ft. Showers.
Wed..SW winds around 15 kt with gusts up to 25 kt. Seas 3 to 4 ft. Showers likely, mainly in the morning.
Wed night..W winds 10 to 15 kt with gusts up to 20 kt. Seas around 3 ft. 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.
.small craft advisory in effect until 8 pm edt this evening...
Tonight..NW winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 25 kt. Seas around 4 ft.
Sat..NW winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt in the afternoon. Seas around 3 ft.
Sat night..W winds around 5 kt. Seas around 2 ft.
Sun..S winds around 5 kt. Seas 1 foot or less.
Sun night..E winds 5 to 10 kt. Seas 1 foot or less, then around 2 ft after midnight.
Mon..NE winds 5 to 10 kt. Seas around 2 ft.
Mon night..NE winds 10 to 15 kt. Gusts up to 20 kt after midnight. Seas around 3 ft.
Tue..E winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. A chance of showers.
Tue night..SE winds 10 to 15 kt with gusts up to 25 kt. Seas 3 to 4 ft. Showers.
Wed..SW winds around 15 kt with gusts up to 25 kt. Seas 3 to 4 ft. Showers likely, mainly in the morning.
Wed night..W winds 10 to 15 kt with gusts up to 20 kt. Seas around 3 ft. 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 Fri Oct 18 2019
Synopsis for massachusetts and rhode island coastal waters.. A gale center moves up into the maritimes overnight. West winds gradually weaken by Saturday morning as high pressure builds over the east coast for the weekend. Low pressure may approach the southern waters Sunday night and Monday then remain in the vicinity through Tuesday. A cold front swings across the waters on Wednesday. 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.
Synopsis for massachusetts and rhode island coastal waters.. A gale center moves up into the maritimes overnight. West winds gradually weaken by Saturday morning as high pressure builds over the east coast for the weekend. Low pressure may approach the southern waters Sunday night and Monday then remain in the vicinity through Tuesday. A cold front swings across the waters on Wednesday. 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 Brewster, MA
Hourly EDIT Helplocation: 41.77, -70.08 debug
Area Discussion for - Boston, MA
(on/off) Help NOTE: mouseover dotted underlined text for definition| Fxus61 kbox 182259 afdbox area forecast discussion national weather service boston norton ma 659 pm edt Fri oct 18 2019 Synopsis High pressure will build across the region this weekend bringing dry and seasonable fall-like weather. Low pressure across the great lakes with another low well south of nantucket will likely bring showers and gusty onshore winds Tuesday into the mid week timeframe. Another high builds to the mid atlantic coast with more dry weather around Thursday. Near term until 6 am Saturday morning 700 pm update... no major changes to the near term forecast this evening. Skies continue to clear with the last of the mid level deck lingering over western ma and ct this evening. These will be gone in plenty of time to benefit from radiative cooling overnight. The big storm from yesterday will continue to move north across eastern canada tonight as high pressure builds in from the west. This coupled with the loss of daytime heating should allow gusty winds to diminish early this evening. We also should see the strato cu dissipate this evening with skies eventually becoming mainly clear tonight. Diminishing winds coupled with mainly clear skies should result in a good night of radiational cooling. Low temps in many locations should bottom out in the lower to middle 30s. We have continued the frost advisory for the areas that were technically still in the growing season. The urban heat islands of boston providence should only drop into the upper 30s to lower 40s by daybreak. Short term 6 am Saturday morning through Saturday night Saturday... high pressure overhead will result in a very nice fall day. After a chilly start, mostly sunny skies should allow Sat afternoon high temps to top out near 60 in most locations. Light winds and lots of sunshine will make for a rather comfortable, but fall-like afternoon. Saturday night... high pressure will remain in control of the region, resulting in continued dry tranquil weather. Model cross sections do indicate that some high thin cloudiness may move into the region, but do not expect them to have much impact on temperatures. The relatively dry airmass in place along with light winds should allow a good night of radiational cooling. Low temperatures by daybreak Sunday will be in the upper 20s to the middle 30s in most locations except milder in a few of the urban centers. Additional frost freeze headlines will likely be needed where the growing season is technically still in progress. Long term Sunday through Friday Highlights... * remnants of tropical storm nestor may bring some showers on Sunday, mainly to the south coast * dry Monday under high pressure ridge * unsettled weather returns tues Wed with rain and gusty winds * dry late week Sunday and Monday... upper level ridge axis crosses the region early Sunday, placing southern new england on the backside of the ridge under SW return flow aloft, brining in more moisture and cloudy skies. Better cloud coverage the further south you go, in closer proximity to the subtropical tap of moisture lifting north. This is associated with what is now tropical storm nestor, currently in the gulf of mexico. Nestor is expected to move off the coast of north carolina into the western atlantic as a post-tropical cyclone late Sunday. Currently the most consistent guidance keeps the low center far enough south that southern new england should escape any significant wind rain, with perhaps the northern periphery of the rain shield reaching the south coast or toward the mass pike. For now going with a slight chance of rain showers Sunday in southern ma and southern ri. Monday, while the remnants of nestor meander well to our south a nice day is in store. An inverted ridge of high pressure keeps the low center away while a mid level heights rise. Good subsidence and a dry column will lead to a sunny, dry day with highs in the 60s. This is right in line with seasonal normals for late october. The gradient between the high and remnant low to our south may make things breezy along the south coast, but not expecting anything particularly impactful (gusts 15-25 mph). Tuesday and Wednesday... next chance of rain ramps up on Tuesday, maximizing in probability and rainfall amounts Tuesday evening through the overnight hours. This as a deep mid level shortwave approaches from the midwest, becoming negatively tilted as it approaches new england Tuesday night. A deep plume of moisture precedes the associated cold front which crosses the region sometime late Tuesday or early Wednesday. Additionally, along this frontal boundary a secondary low is generated over the delmarva, while likely phasing with the remnants of nestor. A lot of dynamic mesoscale features will be in play with many moving parts, details of which will come into better focus as we approach. All things considered, none of the guidance shows this system getting near the strength of this past week's storm; no eps members take the low sub-1000mb over southern new england. So, expecting a rain event with breezy winds - details to be ironed out |
in the future. Thursday and Friday... dry weather on tap to end the week as high pressure takes hold. No major warm ups or cool downs; temperatures stay seasonal with highs in the low 60s and lows in the 40s. Aviation 00z Saturday through Wednesday Forecaster confidence levels... low - less than 30 percent. Moderate - 30 to 60 percent. High - greater than 60 percent. Short term through Saturday night ... 00z update... tonight... High confidence.VFR conditions as the remaining strato CU dissipates this evening. Gusty northwest winds diminish early in the evening. Saturday and Saturday night... High confidence inVFR conditions. Nw winds of 5 to 10 knots during the daylight hours Saturday become very light Saturday night. Kbos terminal... High confidence in taf. Kbdl terminal... High confidence in taf. Outlook Sunday through Wednesday ... High confidence. Sunday:VFR. Slight chance shra. Sunday night:VFR. Monday through Monday night:VFR. Breezy. Tuesday: mainlyVFR, with local ifr possible. Breezy. Chance shra. Tuesday night: mainlyVFR, with local ifr possible. Breezy. Shra likely. Wednesday:VFR. Breezy. Chance shra. Marine Forecaster confidence levels... low - less than 30 percent. Moderate - 30 to 60 percent. High - greater than 60 percent. Short term through Saturday night ... tonight... High confidence. Lingering SCA winds seas will gradually diminish as the night wears along from west to east. This in response to high pressure building in from the west. SCA headlines will gradually expire in most locations tonight as a result. Saturday and Saturday night... High confidence. High pressure in control will keep winds seas below small craft advisory thresholds. Outlook Sunday through Wednesday ... Moderate confidence. Sunday through Sunday night: winds less than 25 kt. Slight chance of rain showers. Monday: winds less than 25 kt. Local rough seas. Monday night: winds less than 25 kt. Areas of rough seas. Slight chance of rain showers. Tuesday: low risk for small craft advisory winds with gusts up to 25 kt. Rough seas up to 9 ft. Chance of rain showers. Tuesday night: low risk for small craft advisory winds with gusts up to 25 kt. Rough seas up to 9 ft. Rain showers likely. Wednesday: moderate risk for small craft advisory winds with gusts up to 25 kt. Rough seas up to 8 ft. Chance of rain showers. Box watches warnings advisories Ct... Frost advisory from 3 am to 8 am edt Saturday for ctz002>004. Ma... Frost advisory from 3 am to 8 am edt Saturday for maz017-018. Ri... Frost advisory from 3 am to 8 am edt Saturday for riz001-003. Marine... Small craft advisory until 8 pm edt this evening for anz231>235-237-251-256. Small craft advisory until 8 am edt Saturday for anz250-254. Small craft advisory until 2 am edt Saturday for anz255. Synopsis... Frank bw near term... Frank bw short term... Frank long term... Bw aviation... Frank bw marine... Frank bw |
Weather Reporting Stations
EDIT (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 |
| 44090 | 14 mi | 49 min | 56°F | 3 ft | ||||
| 44020 - NANTUCKET SOUND | 22 mi | 39 min | 57°F | 1 ft | ||||
| WAXM3 - Waquoit Bay Reserve, MA | 27 mi | 94 min | WNW 1 | 53°F | 1009 hPa | 43°F | ||
| 44018 - SE Cape Cod 30NM East of Nantucket, MA | 30 mi | 29 min | WNW 21 G 25 | 53°F | 4 ft | 1009.4 hPa (+2.7) | 39°F | |
| NTKM3 - 8449130 - Nantucket Island, MA | 34 mi | 49 min | NW 7 G 9.9 | 56°F | 57°F | 1009.9 hPa | ||
| BZBM3 - 8447930 - Woods Hole, MA | 36 mi | 49 min | 56°F | 60°F | 1010.1 hPa |
Wind History for Nantucket Island, MA
(wind in knots) EDIT (on/off) Help| 9 PM | 10 PM | 11 PM | 12 AM | 1 AM | 2 AM | 3 AM | 4 AM | 5 AM | 6 AM | 7 AM | 8 AM | 9 AM | 10 AM | 11 AM | 12 PM | 1 PM | 2 PM | 3 PM | 4 PM | 5 PM | 6 PM | 7 PM | 8 PM | |
| Last 24hr | W G23 | W G27 | W G21 | W G27 | W G19 | W G21 | W G20 | W G20 | W G19 | W G18 | W G19 | W G17 | NW G21 | NW G19 | NW G21 | NW G20 | NW G19 | NW G15 | NW G12 | NW G13 | NW G13 | NW G7 | NW G11 | NW G10 |
| 1 day ago | E G24 | E G26 | E G31 | E G31 | E G42 | SE G38 | S G22 | SW G29 | SW G27 | SW G28 | SW G26 | SW G25 | SW G30 | W G27 | W G29 | SW G31 | SW G21 | SW G25 | SW G25 | SW G33 | W G35 | W G27 | W G26 | |
| 2 days ago | -- | S | -- | S | S | S | S | S | S | S | -- | SE | E | E G13 | E | E G16 | E G17 | E G18 | E G19 | E G18 | E G17 | E G16 | E G20 | E G24 |
Airport Reports
EDIT (on/off) Help Click EDIT to display multiple airports. Follow links for more data.| Airport | Dist | Age | Wind kt | Visibility | Sky/Weather | Temp | DewPt | Humidity | Pressure |
| Hyannis, Barnstable Municipal-Boardman Airport, MA | 12 mi | 83 min | WNW 5 | 10.00 mi | Fair | 53°F | 39°F | 61% | 1009.1 hPa |
| Provincetown Municipal Airport, MA | 18 mi | 23 min | NW 17 | 10.00 mi | Fair | 53°F | 42°F | 66% | 0 hPa |
Link to 5 minute data for KCQX
Wind History from CQX (wind in knots)
| 2 AM | 3 AM | 4 AM | 5 AM | 6 AM | 7 AM | 8 AM | 9 AM | 10 AM | 11 AM | 12 PM | 1 PM | 2 PM | 3 PM | 4 PM | 5 PM | 6 PM | 7 PM | 8 PM | 9 PM | 10 PM | 11 PM | 12 AM | 1 AM | |
| Last 24hr | Calm | Calm | S | Calm | Calm | Calm | Calm | SE | E | SE G16 | SE G18 | SE G19 | SE | SE G18 | E G21 | E G18 | SE G20 | E G23 | E G24 | E G24 | E G24 | E G31 | E G38 | E G40 |
| 1 day ago | W | NW | NW | NW | Calm | NW | N | N | NE | NE | Calm | Calm | Calm | Calm | Calm | Calm | Calm | |||||||
| 2 days ago | Calm | S | S | S | S | Calm | S | SE | SE | E | E | E | E | Calm | W | SW | SW | W |
Tide / Current Tables for Sesuit Harbor, East Dennis, Cape Cod Bay, Massachusetts
EDIT Weekend mode (on/off) (on/off) Help One Week of DataTide / Current data from XTide NOT FOR NAVIGATION
Tide / Current Tables for Pollock Rip Channel, Massachusetts Current
EDIT (on/off) Help One Week of DataPollock Rip Channel
Click for Map
Fri -- 12:56 AM EDT -0.00 knots Slack
Fri -- 03:32 AM EDT -1.79 knots Max Ebb
Fri -- 06:37 AM EDT 0.00 knots Slack
Fri -- 06:55 AM EDT Sunrise
Fri -- 09:43 AM EDT 1.83 knots Max Flood
Fri -- 11:27 AM EDT Moonset
Fri -- 01:07 PM EDT -0.00 knots Slack
Fri -- 03:49 PM EDT -1.81 knots Max Ebb
Fri -- 05:54 PM EDT Sunset
Fri -- 06:52 PM EDT 0.00 knots Slack
Fri -- 09:05 PM EDT Moonrise
Fri -- 10:07 PM EDT 2.01 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Fri -- 12:56 AM EDT -0.00 knots Slack
Fri -- 03:32 AM EDT -1.79 knots Max Ebb
Fri -- 06:37 AM EDT 0.00 knots Slack
Fri -- 06:55 AM EDT Sunrise
Fri -- 09:43 AM EDT 1.83 knots Max Flood
Fri -- 11:27 AM EDT Moonset
Fri -- 01:07 PM EDT -0.00 knots Slack
Fri -- 03:49 PM EDT -1.81 knots Max Ebb
Fri -- 05:54 PM EDT Sunset
Fri -- 06:52 PM EDT 0.00 knots Slack
Fri -- 09:05 PM EDT Moonrise
Fri -- 10:07 PM EDT 2.01 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
| 12 am | 1 am | 2 am | 3 am | 4 am | 5 am | 6 am | 7 am | 8 am | 9 am | 10 am | 11 am | 12 pm | 1 pm | 2 pm | 3 pm | 4 pm | 5 pm | 6 pm | 7 pm | 8 pm | 9 pm | 10 pm | 11 pm |
| 0.9 | -0.1 | -1.1 | -1.7 | -1.7 | -1.3 | -0.5 | 0.3 | 1.2 | 1.7 | 1.8 | 1.5 | 1 | 0.1 | -0.9 | -1.6 | -1.8 | -1.4 | -0.8 | 0.1 | 1 | 1.7 | 2 | 1.9 |
Weather Map
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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 Boston, MA (20,4,5,8)
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Ground Weather Radar Station Boston, MA
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Disclaimer: 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. |