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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 5:48AM | Sunset 7:35PM | Sunday April 22, 2018 2:58 AM EDT (06:58 UTC) | Moonrise 11:30AM | Moonset 1:39AM | Illumination 44% |  |
Marine Forecasts
EDIT (on/off) Help| ANZ251 Massachusetts Bay And Ipswich Bay- 116 Am Edt Sun Apr 22 2018 Rest of tonight..NW winds 5 to 10 kt. Seas 1 foot or less. Sun..NW winds 5 to 10 kt, becoming se in the afternoon. Seas 1 foot or less. Sun night..SW winds 5 to 10 kt, becoming nw after midnight. Seas 1 foot or less. Mon..N winds around 5 kt, becoming se in the afternoon. Seas around 2 ft. Mon night..S winds 5 to 10 kt. Seas 2 to 3 ft. Tue..SW winds 5 to 10 kt, becoming S 10 to 15 kt in the afternoon. Seas 2 to 3 ft. Tue night..S winds 10 to 15 kt, diminishing to 5 to 10 kt after midnight. Seas 2 to 3 ft. A chance of rain. Wed..SE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Rain likely. Wed night..SE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Rain likely. Thu..S winds 5 to 10 kt. Seas 2 to 3 ft. A chance of rain. Thu night..W winds 5 to 10 kt with gusts up to 20 kt. Seas 2 to 4 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 116 Am Edt Sun Apr 22 2018 Synopsis for massachusetts and rhode island coastal waters.. High pressure will build over the waters overnight through Monday, then shift offshore on Tuesday. Low pressure will move north along the eastern seaboard Tuesday night and Wednesday, lifting over the waters on Thursday. 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 Ipswich, MA
Hourly EDIT Helplocation: 42.68, -70.83 debug
Area Discussion for - Boston, MA
(on/off) Help NOTE: mouseover dotted underlined text for definition| Fxus61 kbox 220603 afdbox area forecast discussion national weather service boston norton ma 203 am 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. Mainly dry weather follows on Friday before becoming dreary again next weekend. Near term through today High pressure builds over the region today. Moisture cross sections show a moist layer between 750 mb and 850 mb this afternoon. This may be enough to generate a few clouds above 5000 feet, but otherwise a sunny day. The light pressure gradient will mean light winds today, but will also be favorable for sea breezes developing along the coast during the late morning midday and continuing through afternoon. Mixing yesterday reached to nearly 750 mb, per 00z soundings. Model cross sections show mixing to 800 mb today. Temperatures at that level will be -5c to -6c, which is equivalent to 0c to -1c at 850 mb. Fully mixed, this would favor MAX sfc temps in the upper 50s and around 60. Mixing a little deeper would support MAX temps 60-65. Cooler temperatures near the coast due to the sea breeze. Short term tonight through 6 pm Monday High pressure remains overhead tonight and Monday. Expect radiational cooling tonight, bringing another chilly night with areas of frost, even some temps below freezing. Sunny skies on Monday with light wind, which will again allow developing sea breezes. Similar deep mixing to today, but with temperatures a few degrees warmer and supporting sfc MAX temps in the low to mid 60s away from the cooler coast. Long term Monday night through Saturday * highlights... - warm up early next week - wet and breezy midweek - perhaps a reprieve Friday - more showers possible Saturday 21 12z guidance remained in rather good agreement with the overall synoptic pattern through Wednesday. Then typical timing and amplitude differences creep into the solutions. Prefer a consensus blend to smooth over the less predictable features for this time range. Expecting well defined mid level northern and southern stream features to phase over the central appalachians about mid week. Guidance remained consistent with that idea from previous runs. It's how the pattern evolves after this phasing where some questions remain, particularly with timing. In most cases, looking like a period of wet weather sometime Wednesday, and perhaps lingering into Thursday. Depending on timing, another front may pass through our region sometime Friday into Saturday. Temperature-wise, looking much closer to normal early next week. Seabreezes likely on Monday, so cooler towards the coasts. Below normal temperatures should return mid week, then remain near to below normal into next weekend. Aviation 06z Sunday through Thursday Forecaster confidence levels... low - less than 30 percent. Moderate - 30 to 60 percent. |
High - greater than 60 percent. Short term through Monday ... High confidence. Vfr through the period with light wind. Coastal seabreezes will develop midday afternoon, dissipate in the evening, then redevelop Monday midday afternoon. Kbos terminal... High confidence in taf. Moderate-high probability of a sea breeze midday afternoon. Kbdl terminal... High confidence in taf. Outlook Monday night through Thursday ... High confidence. Monday night through Tuesday:VFR. Tuesday night: mainlyVFR, with local MVFR possible. Breezy. Chance ra. Wednesday: mainly MVFR, with areas ifr possible. Breezy. Ra likely. Wednesday night: mainlyVFR, with areas ifr possible. Breezy. Chance ra. Thursday: mainlyVFR, with local MVFR possible. Chance ra, slight 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 ... High confidence. Light winds and seas. Winds turning onshore near the coast midday afternoon and again Monday midday afternoon as sea breezes develop. Outlook Monday night through Thursday ... High confidence. Monday night through 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. Local rough seas. Rain likely. Wednesday night: winds less than 25 kt. Areas of rough seas. Chance of rain. Thursday: winds less than 25 kt. Areas of rough seas. Chance of rain, slight chance of rain showers. Box watches warnings advisories Ct... None. Ma... None. Ri... None. Marine... None. Synopsis... Wtb belk near term... Wtb short term... Wtb long term... Belk aviation... Wtb belk marine... Wtb belk |
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 |
| 44029 - Buoy A0102 - Mass. Bay/Stellwagen | 18 mi | 114 min | 42°F | 42°F | 1 ft | 1025 hPa | ||
| IOSN3 - Isle of Shoals, NH | 23 mi | 58 min | W 11 G 11 | 45°F | 1025.4 hPa (+0.0) | 22°F | ||
| BHBM3 - 8443970 - Boston, MA | 25 mi | 40 min | 48°F | 1025.7 hPa | ||||
| 44013 - BOSTON 16 NM East of Boston, MA | 25 mi | 68 min | WNW 5.8 G 5.8 | 44°F | 43°F | 1 ft | 1025.3 hPa (+0.7) | |
| BGXN3 - Great Bay Reserve, NH | 26 mi | 73 min | Calm | 34°F | 971 hPa | 27°F | ||
| 44098 - Jeffrey's Ledge, NH (160) | 36 mi | 52 min | 42°F | 1 ft | ||||
| 44030 - Buoy B0102 - Western Maine Shelf | 41 mi | 114 min | WSW 3.9 G 5.8 | 42°F | 42°F | 1 ft | 1024.5 hPa | |
| WELM1 - 8419317 - Wells, ME | 46 mi | 40 min | WNW 5.1 G 7 | 39°F | 43°F | 1025.7 hPa | ||
| WEXM1 - Wells Reserve, ME | 48 mi | 58 min | W 1.9 | 38°F | 23°F |
Wind History for Wells, ME
(wind in knots) EDIT (on/off) Help| 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 | NW G8 | NW | NW | NW | NW | NW G8 | NW G11 | NW G15 | N G17 | NW G11 | NW G20 | NW G13 | NW G16 | NW G22 | SE | SE | S | SE | NE | N | NW | NW | NW | W |
| 1 day ago | NW G10 | NW G13 | NW G12 | NW G14 | NW G13 | NW G14 | NW G19 | N G20 | NW G18 | NW G19 | NW G23 | NW G20 | NW G20 | NW G17 | N G23 | NW G19 | NW G17 | NW G17 | NW G16 | NW G17 | NW G12 | NW G14 | NW G12 | NW G10 |
| 2 days ago | W G7 | W | W G5 | W | W G8 | W | W | SW | S | S | S | S | W | NW | N | NW G12 | NW G12 | NW | NW | NW G7 | NW G9 |
Airport Reports
EDIT (on/off) Help Click EDIT to display multiple airports| Airport | Dist | Age | Wind kt | Visibility | Sky/Weather | Temp | DewPt | Humidity | Pressure |
| Beverly, Beverly Municipal Airport, MA | 8 mi | 65 min | N 0 | 10.00 mi | Fair | 37°F | 21°F | 54% | 1025.8 hPa |
| Lawrence Municipal Airport, MA | 16 mi | 64 min | N 0 | 10.00 mi | Fair | 41°F | 19°F | 43% | 1027 hPa |
| Boston, Logan International Airport, MA | 23 mi | 64 min | NW 4 | 10.00 mi | Fair | 46°F | 19°F | 35% | 1026.5 hPa |
Wind History from BVY (wind in knots)
| 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 | 2 AM | |
| Last 24hr | W | W | W | W | W | NW | NW | NW G20 | NW G18 | NW G20 | NW G17 | NW G20 | NW G16 | N G17 | NW G21 | NW G20 | NW | N | N | N | N | N | NW | Calm |
| 1 day ago | NW G19 | NW G17 | NW | W G16 | W | NW G22 | NW G26 | NW G25 | NW G22 | NW G25 | NW G22 | NW G23 | NW G22 | NW G26 | NW G29 | N | NW G19 | NW G23 | NW | NW | NW | NW G16 | W | W |
| 2 days ago | W | SW | SW | SW | W | SW | W | Calm | W | Calm | Calm | SW | SW | SW | W | W | W | NW | NW | NW | NW G21 | NW G19 | NW |
Tide / Current Tables for Plum Island Sound (south end), Massachusetts
EDIT RT Ports Option Weekend mode (on/off) (on/off) Help One Week of Data| Plum Island Sound (south end) Click for Map Sun -- 01:38 AM EDT Moonset Sun -- 04:40 AM EDT 9.60 feet High Tide Sun -- 05:50 AM EDT Sunrise Sun -- 11:29 AM EDT Moonrise Sun -- 11:35 AM EDT -0.27 feet Low Tide Sun -- 05:31 PM EDT 8.53 feet High Tide Sun -- 05:46 PM EDT First Quarter Sun -- 07:33 PM EDT Sunset Sun -- 11:55 PM EDT 0.78 feet Low Tide 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 |
| 1.4 | 3.2 | 5.6 | 7.9 | 9.3 | 9.5 | 8.8 | 7.3 | 5.2 | 2.8 | 1 | -0.1 | -0.2 | 0.9 | 2.9 | 5.3 | 7.3 | 8.4 | 8.4 | 7.7 | 6.2 | 4.3 | 2.4 | 1.2 |
Tide / Current Tables for Newburyport (Merrimack River), Massachusetts Current
EDIT (on/off) Help One Week of Data| Newburyport (Merrimack River) Click for Map Sun -- 01:38 AM EDT Moonset Sun -- 01:54 AM EDT 1.28 knots Max Flood Sun -- 02:36 AM EDT 1.26 knots Min Flood Sun -- 03:34 AM EDT 1.30 knots Max Flood Sun -- 05:42 AM EDT -0.00 knots Slack Sun -- 05:50 AM EDT Sunrise Sun -- 08:12 AM EDT -1.38 knots Max Ebb Sun -- 11:29 AM EDT Moonrise Sun -- 12:14 PM EDT 0.00 knots Slack Sun -- 04:13 PM EDT 1.30 knots Max Flood Sun -- 05:46 PM EDT First Quarter Sun -- 06:20 PM EDT -0.00 knots Slack Sun -- 07:34 PM EDT Sunset Sun -- 08:39 PM EDT -1.11 knots Max Ebb 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 |
| 0.4 | 1.1 | 1.3 | 1.3 | 1.3 | 0.7 | -0.3 | -1 | -1.4 | -1.2 | -0.9 | -0.7 | -0.2 | 0.6 | 1.1 | 1.2 | 1.3 | 1.1 | 0.3 | -0.5 | -1 | -1.1 | -0.8 | -0.6 |
Weather Map and Satellite Images
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GOES Local Image of 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 (2,6,7,8)
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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. |