Saturday, July4, 2020
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Marine Weather and Tides
Bourne, MA

Version 3.4
NOTICE
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
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.

Sunrise 5:10AMSunset 8:20PM Saturday July 4, 2020 1:56 AM EDT (05:56 UTC) Moonrise 8:12PMMoonset 4:27AM Illumination 98% Phase: Waxing Gibbous; Moon at 13 days in cycle
NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.
Marine Forecasts
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ANZ234 Buzzards Bay- 116 Am Edt Sat Jul 4 2020
Rest of tonight..NE winds 5 to 10 kt. Seas around 2 ft. Patchy fog. A slight chance of showers with patchy drizzle. Vsby 1 nm or less.
Sat..NE winds 5 to 10 kt with gusts up to 20 kt. Seas around 2 ft.
Sat night..SE winds 5 to 10 kt, becoming S after midnight. Seas around 2 ft.
Sun..S winds 5 to 10 kt. Seas 1 foot or less.
Sun night..SW winds 5 to 10 kt. Seas 1 foot or less.
Mon and Mon night..S winds 5 to 10 kt. Seas around 2 ft.
Tue through Wed night..SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 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 Sat Jul 4 2020
Synopsis for massachusetts and rhode island coastal waters.. High pres builds across the waters tonight into Sunday. A cold front moves across the waters Sunday night into Monday. High pres returns Monday night into Tuesday. 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 Bourne, MA
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location: 41.74, -70.61     debug


Area Discussion for - Boston, MA
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FXUS61 KBOX 040551 AFDBOX

Area Forecast Discussion National Weather Service Boston/Norton MA 151 AM EDT Sat Jul 4 2020

SYNOPSIS. Showers and a few thunderstorms across western Massachusetts and northern Connecticut will come to an end by early to mid evening. Dry weather is on tap for Saturday, but low clouds and cool temperatures will persist on the coast while a partly sunny and warm afternoon is on tap for interior southern New England. A weak cold front moves through late Sunday/Sunday night which may trigger a few showers or a thunderstorm. Weak high pressure follows Monday, then a warm front approaches Tue with chance of showers/thunderstorms in the interior. Hot and humid conditions move in for the middle and end of next week with scattered afternoon/evening thunderstorms each day.

NEAR TERM /UNTIL 6 AM THIS MORNING/. 1035 PM Update:

Forecast looks to be in good shape at this time with only small tweaks. A few showers well NE of the Outer Cape in the offshore waters on an inverted trough axis in weak elevated instability zone, though these showers to remain offshore and not likely to produce lightning. Low overcast/stratus with intervals of drizzle and mist at times will be the story for the overnight, as cooler stable wedge of high pressure noses southeastward from ME/NH, with modest NE to N winds. Lows look on track in the low to mid 60s, very close to current readings given the NE winds and prevailing OVC.

Previous discussion from 710 PM .

T-storms moving south from SE NY and SW CT along the eastern gradient of the instability axis. Stable environment across BOX CWA. Showers this evening will exit CT and may clip parts of the south coast, otherwise dry most of the night. Some patchy drizzle and fog is possible overnight near the coast with moist NE low level flow, and will have to watch for some showers developing late tonight over the Cape/Islands near elevated instability offshore. Low temps will mainly be in the lower to middle 60s.

SHORT TERM /6 AM THIS MORNING THROUGH 6 PM SUNDAY/. Saturday .

High pressure over the Maritimes and low pressure to our south will maintain low level NE flow. A bit of drizzle is still possible into mid morning along the coast, but the main issue will be low clouds. We should see partial sunshine develop across the interior by afternoon, but it may take until mid to late afternoon for some partial sunshine to emerge across eastern MA/RI. In fact, the Cape/Islands may remain in the low clouds until early evening.

Onshore flow and an abundance of clouds will hold high temps into the 70 to 75 degree range across eastern MA as well as the Cape/Islands. Meanwhile, enough sunshine should push parts of western MA and northern CT into the lower to middle 80s.

Saturday night .

Dry and pleasant weather is expected for Saturday night. Low temps should drop between 60 and 65. Low probability of a shower or two toward daybreak with some elevated instability, but forcing rather limited so maintained a dry forecast. Some patchy fog is possible too.

LONG TERM /SUNDAY NIGHT THROUGH FRIDAY/. Highlights .

* Few showers/t-storms possible Sunday * Seasonably warm Mon/Tue with shower/t-storm risk interior on Tue * Hot and humid Wed-Fri with sct afternoon/evening t-storms

Sunday .

Mid level shortwave drops across northern ME with 500 mb temps dropping to -12 to -13C. This cold pool combined with surface heating will contribute to CAPES 1000-1500 J/kg. Weak cold front moving across SNE may provide a focus for a few showers/t-storms developing. Guidance is not too bullish on convection so areal coverage may be limited but do expect a few storms which may be focused more in eastern half New Eng based on location of front. 850 mb temps around 16C which supports highs well into the 80s and near 90 degrees in CT valley, but cooler immediate coastline where sea breezes expected to develop.

Monday and Tuesday .

Cold front moves offshore by early Mon with weak high pres building in bringing mostly sunny skies. Low level winds turn easterly which will result in a cooler airmass Mon, especially in the east. Instability axis gets pushed west of SNE so a dry day expected. Highs Mon will range from the 70s eastern MA coast to the mid/upper 80s CT valley. Then on Tue, warm front will move in from the west with risk of sct showers/t-storms in western MA/CT as instability increases in the west. Seasonably warm temps Tue.

Wednesday through Friday .

SNE will be on the periphery of subtropical ridge which will result in increasing heat/humidity moving into the region. Many locations will likely see temps into the upper 80s and lower 90s. Series of weak shortwaves traveling within the nearby polar jet combined with unstable environment will lead to scattered afternoon/evening showers/t-storms each day.

AVIATION /06Z SATURDAY THROUGH WEDNESDAY/. Forecaster Confidence Levels .

Low - less than 30 percent. Moderate - 30 to 60 percent. High - greater than 60 percent.

06Z TAF Update:

Overnight/Early AM: High confidence.

Governing IFR to LIFR conditions from ORH east due to either fog, stratus or both. Lowest conditions likely in stratus with visbys 1-3 SM in fog. In the western TAFs, somewhat better flight categories for BAF-BDL-CEF tier with MVFR conds. Low prob of sub-IFR fog developing toward morning at these western airports w/lighter winds and more breaks in clouds anticipated. May need to consider TEMPOs were this to result. N/NE winds 6-10 kt east of ORH, light N winds for western airports.

Today: High confidence in trends, moderate on timing (especially east).

General west to east improvement in categories with VFR anticipated soonest BAF-BDL-CEF, with ongoing IFR/LIFR trending VFR through the mid-morning to mid-afternoon from ORH-BED-PVD BOS. Degraded conditions due to BKN-OVC MVFR-IFR stratus now appear more probable to hold on across the Cape/ACK airports for most of, if not all day. N winds to lighten and become E/ESE 4-8 kt, near 10 kt on the Cape and ACK.

Tonight: Moderate to high confidence.

High confidence in VFR conditions west of ORH. However, probable ongoing MVFR-IFR stratus and mist across the Cape and outer waters looks to advect back westward toward BOS-PVD-BED-ORH after 03z and continue through daybreak. Potential for showers/possible thunder SE of I-95 10-12z but confidence not high. E winds veer to SE and S 4-8 kt.

Sunday: Moderate confidence.

Continued MVFR-IFR near/east of ORH, with low-prob of showers/possible thunder SE of BOS-PVD/I-95. Improvement toward VFR mid-morning/early-afternoon. Thereafter, lowered confidence on location and timing of any possible TSRA in northwest flow aloft between 18-00z. Higher confidence on TSRA into NH. Best chance appears to be near or north of a FIT-BOS line, but may extend as far south as an ORE-ORH-PVD-PVC line. If storms develop, potential for any one to become strong with localized gusty winds and brief sub-VFR visby.

KBOS Terminal . High confidence in TAF.

KBDL Terminal . High confidence in TAF.

Outlook /Sunday Night through Wednesday/ .

Sunday through Sunday Night: VFR. Slight chance SHRA, slight chance TSRA.

Monday: VFR.

Monday Night: VFR. Slight chance SHRA.

Tuesday: VFR. Slight chance SHRA, slight chance TSRA.

Tuesday Night: VFR. Slight chance SHRA.

Wednesday: VFR. Breezy. Slight chance SHRA, slight chance TSRA.

MARINE. Tonight through Saturday night . High confidence.

Marginal NE wind gusts of 20 to 25 knots and 3 to 5 foot persisted late this afternoon, so will maintain SCA headlines across the eastern waters early this evening. Weakening gradient will allow winds/seas to drop below small craft advisory thresholds this evening. NE winds of 10 to 15 knots Sat morning will shift to the south at 5 to 15 knots Sat night as offshore low moves further away from the region. Winds/seas will remain below SCA thresholds Sat and Sat night. Areas of fog tonight and perhaps again Sat night will reduce vsbys at times for mariners.

Outlook /Sunday Night through Wednesday/ .

Sunday through Sunday Night: Winds less than 25 kt. Slight chance of rain showers, slight chance of thunderstorms.

Monday through Tuesday Night: Winds less than 25 kt.

Wednesday: Winds less than 25 kt. Seas locally approaching 5 ft. Slight chance of rain showers, slight chance of thunderstorms.

BOX WATCHES/WARNINGS/ADVISORIES. CT . None. MA . None. RI . None. MARINE . None.

SYNOPSIS . KJC/Frank NEAR TERM . KJC/Frank/Loconto SHORT TERM . Frank LONG TERM . KJC AVIATION . Loconto MARINE . KJC/Frank/Loconto


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
WAXM3 - Waquoit Bay Reserve, MA 12 mi71 min WNW 4.1 65°F 1011 hPa65°F
BZBM3 - 8447930 - Woods Hole, MA 15 mi62 min 65°F 70°F1011.2 hPa
44090 16 mi59 min 67°F2 ft
44020 - NANTUCKET SOUND 24 mi46 min NNE 9.7 G 14 67°F 71°F1010 hPa66°F
FRVM3 - 8447386 - Fall River, MA 29 mi62 min 65°F 73°F1012.4 hPa
BLTM3 - 8447387 - Borden Flats Light at Fall River, MA 30 mi62 min N 8.9 G 12 65°F 1012.2 hPa
FRXM3 30 mi62 min 65°F 64°F
BUZM3 - Buzzards Bay, MA 33 mi56 min N 15 G 16 1012.2 hPa (-0.7)
CHTM3 35 mi98 min NNE 5.1 G 6 64°F 1010.8 hPa
PRUR1 38 mi62 min 65°F 64°F
CPTR1 - 8452944 - Conimicut Light, RI 39 mi62 min 64°F 73°F1012.4 hPa
NAXR1 - Narragansett Bay Reserve, RI 39 mi71 min NE 9.9 65°F 1012 hPa63°F
PTCR1 - 8452951 - Potter Cove, Prudence Island, RI 39 mi62 min NE 9.9 G 14 65°F 1012.7 hPa
PVDR1 41 mi62 min NNE 8 G 13 66°F 1012.6 hPa62°F
44018 - SE Cape Cod 30NM East of Nantucket, MA 41 mi66 min NNE 9.7 G 12 63°F 4 ft1011.7 hPa (-0.4)63°F
NWPR1 - 8452660 - Newport, RI 41 mi62 min N 9.9 G 14 65°F 61°F1011.8 hPa
44013 - BOSTON 16 NM East of Boston, MA 42 mi66 min N 14 G 18 62°F 64°F3 ft1011.3 hPa (-0.3)62°F
NTKM3 - 8449130 - Nantucket Island, MA 42 mi62 min NE 4.1 G 6 64°F 73°F1010.6 hPa
FOXR1 - 8454000 - Providence, RI 42 mi62 min NE 8.9 G 13 65°F 69°F1012.5 hPa
QPTR1 - 8454049 - Quonset Point, RI 44 mi62 min N 14 G 19 65°F 72°F1012.2 hPa
BHBM3 - 8443970 - Boston, MA 48 mi62 min 63°F 63°F1012 hPa

Wind History for Borden Flats Light at Fall River, MA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Otis Air National Guard Base, MA7 mi61 minN 61.00 miFog/Mist64°F64°F100%1011.5 hPa
Hyannis, Barnstable Municipal-Boardman Airport, MA18 mi60 minNNE 73.00 miFog/Mist68°F66°F93%1010.7 hPa
New Bedford, New Bedford Regional Airport, MA19 mi63 minN 510.00 miOvercast65°F63°F93%1011.5 hPa
Marthas Vineyard Airport, MA23 mi63 minN 95.00 miFog/Mist65°F64°F97%1010.8 hPa
Taunton, Taunton Municipal Airport, MA24 mi64 minN 57.00 miOvercast64°F61°F90%1012.1 hPa

Link to 5 minute data for KFMH

Wind History from FMH (wind in knots)
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1 day agoW6W6W5W5W5W7W4W3--CalmW7W7
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2 days agoCalmCalm--CalmCalmCalmCalmS7S7S7S7S10S10S12S10SW8
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Tide / Current Tables for Cape Cod Canal, Buzzards Bay Entrance, Massachusetts
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Cape Cod Canal
Click for Map
Sat -- 04:03 AM EDT     -0.66 feet Low Tide
Sat -- 04:27 AM EDT     Moonset
Sat -- 05:13 AM EDT     Sunrise
Sat -- 09:01 AM EDT     3.59 feet High Tide
Sat -- 04:11 PM EDT     0.15 feet Low Tide
Sat -- 08:11 PM EDT     Moonrise
Sat -- 08:20 PM EDT     Sunset
Sat -- 09:31 PM EDT     4.88 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.910.3-0.3-0.7-0.30.92.23.23.63.32.41.50.80.60.40.20.41.32.744.84.84

Tide / Current Tables for Cape Cod Canal, Massachusetts Current
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Cape Cod Canal
Click for Map
Sat -- 03:12 AM EDT     0.21 knots Slack
Sat -- 04:27 AM EDT     Moonset
Sat -- 05:13 AM EDT     Sunrise
Sat -- 06:25 AM EDT     4.57 knots Max Flood
Sat -- 09:44 AM EDT     -0.02 knots Slack
Sat -- 12:28 PM EDT     -4.49 knots Max Ebb
Sat -- 03:35 PM EDT     0.20 knots Slack
Sat -- 06:39 PM EDT     4.31 knots Max Flood
Sat -- 08:11 PM EDT     Moonrise
Sat -- 08:20 PM EDT     Sunset
Sat -- 09:48 PM EDT     -0.09 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-4.8-4.5-3.5-1.52.94.14.54.542.8-1.7-3.7-4.4-4.4-3.8-2.423.64.24.33.92.9-1.5-3.7

Weather Map
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wmap_A
GEOS 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 (1,6,7,8)
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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 numerous 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.