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Marine Weather and Tides
Version 3.4 |
3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues. 6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported. 5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive. |
| Sunrise 5:47AM | Sunset 7:31PM | Sunday April 22, 2018 5:49 PM EDT (21:49 UTC) | Moonrise 11:32AM | Moonset 1:34AM | Illumination 51% |  |
Marine Forecasts
EDIT (on/off) Help| ANZ232 Nantucket Sound- 321 Pm Edt Sun Apr 22 2018 Tonight..SW winds 5 to 10 kt, becoming nw after midnight. Seas around 2 ft. Mon..N winds around 5 kt, becoming E with gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. Mon night..S winds 5 to 10 kt. Gusts up to 20 kt in the evening. Seas 2 to 3 ft. Tue..S winds 5 to 10 kt. Seas around 2 ft. Tue night..SE winds 10 to 15 kt. Seas 2 to 3 ft. A chance of rain. Wed..SE winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. Rain. Vsby 1 to 3 nm. Wed night..S winds 15 to 20 kt, becoming sw 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 3 to 5 ft. Rain likely. Thu..SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Thu night..W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Fri..S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. A chance of showers. Fri night..S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. A chance of showers. 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 321 Pm Edt Sun Apr 22 2018 Synopsis for massachusetts and rhode island coastal waters.. High pressure remains over the waters through Monday, then shifts the the east on Tuesday. Low pressure will move north along the eastern seaboard Tuesday night and Wednesday, lifting over the waters early Thursday. Another storm will be moving up along the coast late Friday. 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 New Seabury, MA
Hourly EDIT Helplocation: 41.55, -70.48 debug
Area Discussion for - Boston, MA
(on/off) Help NOTE: mouseover dotted underlined text for definition| Fxus61 kbox 221949 afdbox area forecast discussion national weather service boston norton ma 349 pm edt Sun apr 22 2018 Synopsis High pressure remains in control through Tuesday bringing dry weather with moderating temperatures. Wet weather returns Wednesday into Thursday as low pressure moves through our region. Unsettled weather continues into the weekend, but not a washout. Near term until 6 am Monday morning Just about as quiet as it gets around here weatherwise with high pressure in control. Satellite imagery shows clear skies around region with nearest (high) clouds in pa and southern nj. Deep mixing to nearly 850 mb has prevented sea breezes from developing so far this afternoon. However, model guidance suggests winds aloft will weaken just enough to allow a weak sea breeze to develop along E ma coast and a slightly stronger sw sea breeze along south coast from mid to late afternoon. Mixing has also brought drier air to surface, as dewpoints have fallen into teens and lower 20s, resulting in relative humidity values dropping to less than 20 percent. Dewpoints will gradually recover through this evening as mixing subsides. Otherwise, clear skies and light winds tonight with patchy valley fog. Leaned closer to MOS for lows which tend to perform well in these situations. Lows drop back into 30s to around 40 with some patchy frost inland. Short term 6 am Monday morning through Monday night High pressure becomes centered over sne Monday. Once again plenty of sunshine with light winds, and coastal sea breezes will get underway by their usual late morning time frame. This will give way to S SW flow Monday night as the high shifts offshore, with some increase in high clouds late. Stayed close to MOS with highs in the 50s 60s Monday, perhaps approaching 70 in ct valley, and lows falling back into 30s to near 40 Monday night. Long term Tuesday through Sunday * highlights... - wet and breezy midweek - perhaps a reprieve Friday - more showers possible Saturday overview and model preferences... 22 12z guidance remains in decent overall agreement through this portion of the forecast, although more detail differences arise after Wednesday. Generally expecting two mid level waves to phase over the ohio valley central appalachians towards Wednesday. This amplify the resulting trough, and steer a low pressure closer to southern new england Wednesday into Thursday. Near normal temperatures much of this period, except for Wednesday. Continue to favor an ensemble approach for this portion of the forecast, especially after Wednesday. Details... dry weather through Tuesday, with a large high pressure over the maritimes. Some question as to how quickly this high pressure will move offshore. Latest guidance has sped up the arrival of rainfall into late Tuesday night. Some surface ridging noted over southern new england Wednesday morning, so this might be too fast. Preferred a slower arrival to rainfall than the latest guidance for this reason. Good setup for a soaking rain Wednesday into Wednesday night. This looks to be our most likely period of wet weather during the next 7 days. Southern new england should be in the dry slot of this system Thursday, although there could be some lingering showers north of the mass pike Thursday morning. A brief dry period possible Thursday night into early Friday, before another low pressure moves into the great lakes. This system should be close enough where there would at least be a chance for some showers. Not looking like a washout, though. High pressure may start to arrive Sunday, leading to drier weather. Aviation 20z Sunday through Friday Forecaster confidence levels... low - less than 30 percent. Moderate - 30 to 60 percent. High - greater than 60 percent. |
Short term through Monday night ... High confidence. Sea breeze potential still questionable along E ma coast this afternoon as winds aloft have been just strong enough to maintain W NW flow. However, there should be some weakening in winds later this afternoon to allow sea breeze to develop between 20z-23z. Confidence is higher for south coastal sea breeze which should get underway around 20z as well. Vfr. Light W NW winds prevail tonight with local MVFR ifr visibility in patchy valley fog. Higher confidence in sea breezes along both coasts mon. Kbos terminal... Moderate confidence in taf. E sea breeze expected 20z-23z but if it does not occur, winds will veer to n. Kbdl terminal... High confidence in taf. Outlook Tuesday through Friday ... High confidence. Tuesday:VFR. Tuesday night: mainlyVFR, with local ifr possible. Chance ra. Wednesday: MVFR ifr conditions possible. Breezy. Ra. Wednesday night: mainlyVFR, with local ifr possible. Breezy. Chance shra, chance ra. Thursday:VFR. Breezy. Slight chance shra. Thursday night:VFR. Breezy. Friday: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 Monday night ... High confidence. High pressure builds over waters with light winds, flat seas, and good visibility. Only concern for recreational boaters is for sea breezes along south coast this afternoon with 15-20kt gusts and choppy seas near shore, especially when opposing outgoing tide. Similar conditions Monday. Outlook Tuesday through Friday ... High confidence. Tuesday: winds less than 25 kt. Tuesday night: winds less than 25 kt. Seas locally approaching 5 ft. Chance of rain. Wednesday: low risk for small craft advisory winds with gusts up to 25 kt. Areas of rough seas. Rain. Wednesday night: winds less than 25 kt. Rough seas up to 12 ft. Chance of rain, slight chance of rain showers. Thursday: winds less than 25 kt. Rough seas up to 9 ft. Thursday night: winds less than 25 kt. Areas of rough seas. Friday: winds less than 25 kt. Seas up to 5 ft. Chance of rain showers. Equipment Noaa weather radio transmitters serving providence and hyannis are out of service due to phone line problems. The phone company has prioritized the issues and is working to get the weather broadcast back on the air as soon as possible. Box watches warnings advisories Ct... None. Ma... None. Ri... None. Marine... None. Synopsis... Belk jwd near term... Jwd short term... Jwd long term... Belk aviation... Belk jwd marine... Belk jwd equipment... Staff |
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 |
| WAXM3 - Waquoit Bay Reserve, MA | 3 mi | 64 min | 2.9 | 54°F | 1027 hPa | 21°F | ||
| BZBM3 - 8447930 - Woods Hole, MA | 10 mi | 49 min | 49°F | 46°F | 1027.1 hPa (-0.4) | |||
| 44020 - NANTUCKET SOUND | 17 mi | 59 min | SSW 9.7 G 9.7 | 47°F | 44°F | 1 ft | 1027.3 hPa (-0.5) | 38°F |
| 44090 | 22 mi | 49 min | 45°F | 1 ft | ||||
| NTKM3 - 8449130 - Nantucket Island, MA | 27 mi | 49 min | WSW 5.1 G 9.9 | 53°F | 49°F | 1027.7 hPa (-0.0) | ||
| BUZM3 - Buzzards Bay, MA | 31 mi | 49 min | SW 19 G 20 | 47°F | 1027.1 hPa (-0.8) | |||
| FRXM3 | 38 mi | 49 min | 57°F | 24°F | ||||
| FRVM3 - 8447386 - Fall River, MA | 38 mi | 49 min | 58°F | 47°F | 1026.7 hPa (-0.6) | |||
| BLTM3 - 8447387 - Borden Flats Light at Fall River, MA | 38 mi | 49 min | SW 15 G 18 | 54°F | 1025.3 hPa (-0.8) | |||
| NWPR1 - 8452660 - Newport, RI | 45 mi | 49 min | SSW 8 G 15 | 52°F | 44°F | 1026.4 hPa (-0.8) | ||
| NAXR1 - Narragansett Bay Reserve, RI | 46 mi | 64 min | SSW 8.9 | 54°F | 1004 hPa | 31°F | ||
| PTCR1 - 8452951 - Potter Cove, Prudence Island, RI | 46 mi | 49 min | SSW 8 G 12 | 52°F | 1026.2 hPa (-0.8) | |||
| CPTR1 - 8452944 - Conimicut Light, RI | 47 mi | 49 min | S 16 G 19 | 51°F | 47°F | 1025.9 hPa (-0.9) | ||
| QPTR1 - 8454049 - Quonset Point, RI | 49 mi | 49 min | S 19 G 21 | 49°F | 47°F | 1026.5 hPa (-0.8) |
Wind History for Nantucket Island, MA
(wind in knots) EDIT (on/off) Help| 6 PM | 7 PM | 8 PM | 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 | |
| Last 24hr | SW G13 | S G9 | S G6 | S G5 | SW G7 | W | W | W | NW | N G9 | N G10 | NW | NW | NW | NW G11 | NW G10 | NW G9 | NW G9 | NW G8 | N G10 | SW G8 | N | W G11 | W G10 |
| 1 day ago | N | NW G8 | N G10 | N G12 | NW | N G15 | NW G17 | NW G16 | NW G14 | NW G14 | NW G13 | NW G16 | NW G15 | NW G16 | NW G16 | NW G15 | NW G14 | NW G11 | NW G11 | N G10 | N | NW G10 | SW | SW G12 |
| 2 days ago | NW G9 | W G7 | W G7 | W G8 | W G10 | NW G12 | NW | NW G18 | NW G22 | NW G17 | NW G18 | NW G18 | NW G18 | NW G17 | NW G17 | NW G16 | NW G16 | NW G16 | NW G17 | NW G15 | NW G11 | N | N | N |
Airport Reports
EDIT (on/off) Help Click EDIT to display multiple airports| Airport | Dist | Age | Wind kt | Visibility | Sky/Weather | Temp | DewPt | Humidity | Pressure |
| Otis Air National Guard Base, MA | 8 mi | 74 min | SSW 13 | 10.00 mi | Fair | 55°F | 17°F | 23% | 1027.1 hPa |
| Marthas Vineyard Airport, MA | 12 mi | 56 min | SSW 15 | 10.00 mi | Fair | 54°F | 24°F | 31% | 1027 hPa |
| Hyannis, Barnstable Municipal-Boardman Airport, MA | 14 mi | 53 min | SE 6 | 10.00 mi | Fair | 52°F | 30°F | 43% | 1026.8 hPa |
Wind History from FMH (wind in knots)
| 7 PM | 8 PM | 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 | |
| Last 24hr | S | S | S | SW | Calm | Calm | N | NW | NW | N | N | Calm | NW | NW | NW | NW | NW G13 | N | NE G16 | E | SW | S | ||
| 1 day ago | N | NW | NW G18 | NW G15 | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW G18 | NW G17 | NW G20 | NW G17 | NW | W G16 | W G16 | SW | SW | S G13 |
| 2 days ago | NW | W | W | W | NW | NW | NW G12 | NW G16 | NW G17 | NW G17 | W | W G14 | W | NW G17 | NW G21 | NW G25 | W G21 | NW G19 | N G16 | NW | NW | NW G18 | NW G15 | N |
Tide / Current Tables for Succonnesset Point, Nantucket Sound, Massachusetts
EDIT RT Ports Option Weekend mode (on/off) (on/off) Help One Week of Data| Succonnesset Point Click for Map Sun -- 01:33 AM EDT Moonset Sun -- 05:37 AM EDT 2.14 feet High Tide Sun -- 05:51 AM EDT Sunrise Sun -- 11:31 AM EDT Moonrise Sun -- 11:51 AM EDT -0.07 feet Low Tide Sun -- 05:46 PM EDT First Quarter Sun -- 06:24 PM EDT 1.89 feet High Tide Sun -- 07:30 PM EDT Sunset Tide / Current data from XTide NOT FOR NAVIGATION |
| 12am | 1am | 2am | 3am | 4am | 5am | 6am | 7am | 8am | 9am | 10am | 11am | 12pm | 1pm | 2pm | 3pm | 4pm | 5pm | 6pm | 7pm | 8pm | 9pm | 10pm | 11pm |
| 0.2 | 0.6 | 1 | 1.4 | 1.8 | 2.1 | 2.1 | 1.9 | 1.5 | 0.9 | 0.5 | 0.1 | -0.1 | 0.1 | 0.5 | 0.9 | 1.3 | 1.7 | 1.9 | 1.8 | 1.6 | 1.2 | 0.8 | 0.4 |
Tide / Current Tables for Cape Cod Canal, Massachusetts Current
EDIT (on/off) Help One Week of Data| Cape Cod Canal Click for Map Sun -- 01:34 AM EDT Moonset Sun -- 02:52 AM EDT -0.12 knots Slack Sun -- 05:51 AM EDT Sunrise Sun -- 06:02 AM EDT -4.50 knots Max Ebb Sun -- 09:06 AM EDT 0.02 knots Slack Sun -- 11:31 AM EDT Moonrise Sun -- 12:13 PM EDT 4.29 knots Max Flood Sun -- 03:52 PM EDT -0.19 knots Slack Sun -- 05:46 PM EDT First Quarter Sun -- 06:40 PM EDT -4.18 knots Max Ebb Sun -- 07:31 PM EDT Sunset Sun -- 09:42 PM EDT 0.02 knots Slack Tide / Current data from XTide NOT FOR NAVIGATION |
| 12am | 1am | 2am | 3am | 4am | 5am | 6am | 7am | 8am | 9am | 10am | 11am | 12pm | 1pm | 2pm | 3pm | 4pm | 5pm | 6pm | 7pm | 8pm | 9pm | 10pm | 11pm |
| 4 | 3.5 | 2.5 | -1 | -3.1 | -4.1 | -4.5 | -4.2 | -3.2 | -1 | 2.8 | 3.9 | 4.3 | 4.1 | 3.6 | 2.6 | -1.1 | -3.1 | -4 | -4.1 | -3.6 | -2.4 | 1.5 | 3.1 |
Weather Map and Satellite Images
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GOES 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.
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Other links: Northern Pacific Contential US Full GOES-East
Wind Forecast for Boston, MA (17,4,5,8)
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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. |