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Marine Weather and Tide Forecast for Brewster, MA

September 20, 2024 1:38 PM EDT (17:38 UTC) Change Location
Sunrise 6:25 AM   Sunset 6:42 PM
Moonrise 7:59 PM   Moonset 9:33 AM 
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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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ANZ231 Cape Cod Bay- 104 Pm Edt Fri Sep 20 2024

.gale warning in effect through Saturday morning - .

This afternoon - NE winds 20 to 25 kt with gusts up to 35 kt. Seas 5 to 8 ft. Wave detail: E 6 ft at 9 seconds and N 5 ft at 5 seconds. Patchy fog. Showers. Vsby 1 nm or less.

Tonight - NE winds around 25 kt with gusts up to 40 kt. Seas 5 to 8 ft. Wave detail: E 7 ft at 9 seconds and N 6 ft at 5 seconds. Patchy fog. Showers. Vsby 1 nm or less, increasing to 1 to 3 nm after midnight.

Sat - NE winds 20 to 25 kt with gusts up to 35 kt. Seas 5 to 8 ft. Wave detail: E 7 ft at 9 seconds and N 6 ft at 6 seconds. Patchy fog. A chance of showers. Vsby 1 to 3 nm.

Sat night - NE winds 15 to 20 kt with gusts up to 30 kt. Seas 4 to 6 ft. Wave detail: ne 6 ft at 9 seconds and N 5 ft at 6 seconds. Patchy fog in the evening. A chance of showers in the evening.

Sun - NE winds 15 to 20 kt with gusts up to 25 kt. Seas 5 to 6 ft. Wave detail: E 5 ft at 10 seconds and N 4 ft at 6 seconds. A chance of showers in the morning.

Sun night - NE winds 10 to 15 kt with gusts up to 25 kt. Seas 5 to 6 ft. Wave detail: E 5 ft at 10 seconds and N 3 ft at 4 seconds.

Mon and Mon night - NE winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 6 ft.

Tue and Tue night - E winds around 10 kt. Seas 3 to 5 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 103 Pm Edt Fri Sep 20 2024

Synopsis for massachusetts and rhode island coastal waters - Low pres se of nantucket will continue to combine with high pres over se quebec to generate gusty ne winds and building seas with periods of rain into early Sun. This low pres then move farther out to sea as high pres moves S from quebec. Improving weather Sun into early next week.


7 Day Forecast for Marine Location Near Brewster, MA
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Area Discussion for - Boston, MA
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FXUS61 KBOX 201411 AFDBOX

Area Forecast Discussion National Weather Service Boston/Norton MA 1011 AM EDT Fri Sep 20 2024

SYNOPSIS
Northeast winds strengthen along the east coast, Cape, and Islands this afternoon with some 30 to 40 mph gusts possible.
Rain continues at times for the Cape and Islands into Saturday night. Rainfall chances decrease farther to the northwest into this weekend. Gusty northeast winds will keep temperatures near or below normal for much of our region into this weekend. The next chance of rain after this weekend comes around the middle of next week.

NEAR TERM /UNTIL 6 PM THIS EVENING/

10 AM Update:

Not much change from the last update. Lowered winds slightly based on observations, but gusts still look to reach close to 40 knots down towards the Cape and Islands. Continued to keep the precipitation shield in the east. Otherwise, the forecast looks to be on track.

Previous Discussion...

Pressure gradient between an area of low-pressure off the south coast and a high pressure over Canada strengthens today allowing for an uptick in the persistent northeast winds we've experienced over the last 24 hours or so. Sustained winds will range from 10 mph across the interior to 20 to 25 mph along the east coast Cape and Islands. Winds will be gusty with some 30 to 40 mph wind gusts on The Cape and Islands. Shower activity should again stay confined to southeast MA and The Cape.
Extensive cloud cover will support slightly cooler temps for eastern MA and RI today in the mid to upper 60s. Not expecting temperatures to be as warm in the CT River Valley as yesterday, but still warmer than the areas to the east with highs peaking in the low to mid 70s.

SHORT TERM /6 PM THIS EVENING THROUGH 6 PM SATURDAY/
The synoptic weather pattern remains largely unchanged through Saturday with the area of low-pressure off the south coast continuing to meander south of Nantucket. The pressure gradient slackens a bit overnight bringing and end to the 30 to 40 mph wind gusts, but we should continue to see gusts in the 20 to 30 mph range. Shower activity may penetrate a bit farther inland tomorrow, but again we expect the southeast MA, Cape, and Islands to see the most rainfall (0.5 to 1 inches tonight through tomorrow). High temps take a dip again tomorrow afternoon in the low to mid 60s east of I- 495 and upper 60s to low 70s in the CT River Valley.

LONG TERM /SATURDAY NIGHT THROUGH THURSDAY/
Key Points:

* Becoming drier from NW to SE Sunday * Dry to start next week, becoming unsettled mid-week * Near to slightly below normal temperatures for this portion of the forecast

Latest guidance suite continued to converge towards a solution with the timing of a stagnant low pressure SE of our region finally moving farther offshore as a high pressure moves south from eastern Canada. Drier conditions develop from NW to SE Saturday night into Sunday, with the last of the showers expected to move offshore of the Cape and islands by late Sunday afternoon. It's possible this timing may change with later forecasts. Some question as to how long low level moisture hangs around across southeastern sections, so that area might end up staying cloudy most of the day Sunday.
Farther inland looks to feature a good amount of sunshine.
Gusty NE winds also start to diminish Saturday night into Sunday.

High confidence that high pressure will re-establish dominance of our weather Sunday night into Tuesday. Confidence diminishes towards mid week, as the forecast will hinge on how quickly this high pressure departs, and opens the door for a low pressure to move into the Great Lakes towards mid week. Stayed close to the latest NationalBlend guidance for precipitation chances since it is an ensemble-based solution.

AVIATION /14Z FRIDAY THROUGH TUESDAY/
Forecast Confidence Levels:

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

Today...High Confidence

MVFR borderline IFR conditions persist at the same terminals through tonight as area of low-pressure supporting northeast winds and lower ceilings remains somewhat stationary. Wind gusts will increase this afternoon with 40+ knot gusts possible at Nantucket and 30 to 35 knot gusts possible over The Cape. Wind gusts should be more modest at the remaining terminals in the 20 to 25 knot range. Gusts at Nantucket peak around 18Z before gradually falling to the 30 to 35 knot range by 00Z tonight.
Expect continued shower activity over The Cape/Islands with some stray showers possible at the eastern terminals. BDL,BAF,ORH should stay dry today.

Tonight...High confidence in flight categories, lower confidence in precipitation potential

Little change to flight categories overnight with more IFR/MVFR ceilings and -SHRA over The Cape/Islands. Northeast winds remain somewhat elevated from 10 to 20 knots with gusts from 20 to 30 knots. Strongest winds over The Cape/Islands.

Tomorrow

Interior terminals trend to VFR ceilings by 18Z. Lower ceilings linger at BOS,PVD, and Cape/Island Terminals (MVFR/IFR ~ 1000 feet) with slow improvements by 00Z tomorrow evening.

BOS TAF...High Confidence

Teetering between MVFR/IFR for much of the next 36 hours. Steady northeast winds with gusts from 20 to 25 knots. Should see improvements to VFR by Saturday afternoon/evening.

BDL TAF... High Confidence

Outlook /Saturday Night through Tuesday/...

Saturday Night: Mainly VFR, with local MVFR possible. Windy with local gusts up to 30 kt. Chance SHRA.

Sunday: Mainly VFR, with local MVFR possible. Breezy. Slight chance SHRA.

Sunday Night through Monday: VFR. Breezy.

Monday Night: Mainly VFR, with local MVFR possible.

Tuesday: Mainly VFR, with areas MVFR possible.

MARINE
Forecaster Confidence Levels:

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

10 AM Update:

Expanded Gale Warning to include northern coastal waters and into southern coastal waters, excluding Block Island.

Previous discussion:

Today through Saturday

Dangerous marine conditions through Saturday as an area of low pressure south Nantucket continues to produce a persistent fetch over the coastal waters. Persistent northeast winds will result in building seas and significant wave heights from 10 to 13 feet off the coast of Wellfleet. The eastern waters may see wave heights from 7 to 10 feet over the near-shore marine zones. For the south coastal waters the near-shore zones will be in the 4 to 6 foot range the outer marine zones in the 6 to foot range.

Northeast winds strengthen to gale force over the south coastal waters today with some gusts up to 40 knots possible. A Gale Warning remains in effect through this evening. Winds weaken somewhat tonight into tomorrow but still remain elevated with gusts up to 30 knots. Small Craft Advisories will likely be needed through the weekend.

Outlook /Saturday Night through Tuesday/...

Saturday Night: Moderate risk for Small Craft Advisory winds with gusts up to 30 kt. Rough seas up to 10 ft. Chance of rain showers.

Sunday: Moderate risk for Small Craft Advisory winds with gusts up to 25 kt. Rough seas up to 10 ft. Slight chance of rain showers.

Sunday Night through Monday: Winds less than 25 kt. Rough seas up to 10 ft.

Monday Night: Winds less than 25 kt. Rough seas up to 9 ft.

Tuesday: Winds less than 25 kt. Areas of rough seas.

TIDES/COASTAL FLOODING
Coastal Flood Watch has been converted to a Coastal Flood Advisory. Latest suite of guidance has trended toward lower surge values for eastern MA as of this evening. If we consult the latest 90th percentile PETSS model run, most locations are falling short of moderate flood stage. While minor coastal flooding will be more common, some pockets of moderate coastal flooding will be possible at locations recently impacted by erosion or locations that are impacted by the elevated wave heights.

Since confidence is high that steady northeast winds will persist through at least Saturday afternoon, we've included the advisory to cover the Friday night and Saturday afternoon high tide cycles. Astronomical high tides will be substantially lower tonight compared to this afternoon and Saturday afternoon, but several tide gages in eastern MA are forecast to reach or fall just short of minor flood stage overnight. Even if locations fall short of minor flood stage during tonight's high tide, we still expect at least pockets of minor coastal flooding due to the elevated wave action.

BOX WATCHES/WARNINGS/ADVISORIES
CT...None.
MA...High Surf Advisory until 7 PM EDT this evening for MAZ007-019- 022-024.
Coastal Flood Advisory until 6 PM EDT this evening for MAZ007- 015-016-019-022>024.
Coastal Flood Advisory from 11 PM this evening to 5 AM EDT Saturday for MAZ007-015-016-019-022>024.
Coastal Flood Advisory from 11 AM to 5 PM EDT Saturday for MAZ007-015-016-019-022>024.
High Risk for Rip Currents until 7 PM EDT this evening for MAZ023.
RI...High Risk for Rip Currents until 7 PM EDT this evening for RIZ006>008.
MARINE...Small Craft Advisory until 8 AM EDT Saturday for ANZ230-236- 237.
Gale Warning until 8 AM EDT Saturday for ANZ231>235-250-251- 254>256.




Weather Reporting Stations
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Stations Dist Age Wind AirWater WavesinHgDewPt
CHTM3 9 mi68 min 63°F 29.90
44090 14 mi68 min 61°F 63°F5 ft
44020 - NANTUCKET SOUND 22 mi38 minNNE 23G27 64°F 69°F29.8764°F
NTKM3 - 8449130 - Nantucket Island, MA 34 mi68 minNNE 16G27 64°F 68°F29.87
BZBM3 - 8447930 - Woods Hole, MA 36 mi68 min 63°F 68°F29.91
NBGM3 45 mi68 minNE 16G23 62°F 29.95


Wind History for Nantucket Island, MA
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Airport Reports
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AirportDistAgeWind ktVisSkyWeatherAirDewPtRHinHg
KCQX CHATHAM MUNI,MA 7 sm28 minNNE 09G221/4 smOvercast Rain Mist 64°F63°F94%29.90
KHYA BARNSTABLE MUNIBOARDMAN/POLANDO FIELD,MA 13 sm42 minNNE 15G252 smOvercast Rain Mist 61°F61°F100%29.89
KPVC PROVINCETOWN MUNI,MA 22 sm42 minNE 17G284 smOvercast Lt Rain Mist 61°F61°F100%29.95


Tide / Current for Pleasant Bay, Quonset Pont, Massachusetts
   
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Pleasant Bay
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Fri -- 03:46 AM EDT     3.85 feet High Tide
Fri -- 06:25 AM EDT     Sunrise
Fri -- 09:32 AM EDT     Moonset
Fri -- 10:30 AM EDT     -0.37 feet Low Tide
Fri -- 04:07 PM EDT     4.00 feet High Tide
Fri -- 06:39 PM EDT     Sunset
Fri -- 07:58 PM EDT     Moonrise
Fri -- 11:00 PM EDT     -0.54 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Pleasant Bay, Quonset Pont, Massachusetts, Tide feet
12
am
0.5
1
am
1.7
2
am
2.8
3
am
3.7
4
am
3.8
5
am
3.4
6
am
2.7
7
am
1.9
8
am
1.1
9
am
0.3
10
am
-0.3
11
am
-0.3
12
pm
0.3
1
pm
1.4
2
pm
2.6
3
pm
3.6
4
pm
4
5
pm
3.8
6
pm
3.1
7
pm
2.3
8
pm
1.4
9
pm
0.5
10
pm
-0.2
11
pm
-0.5


Tide / Current for Pollock Rip Channel, Massachusetts Current
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Pollock Rip Channel
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Fri -- 01:57 AM EDT     -2.23 knots Max Ebb
Fri -- 05:05 AM EDT     0.00 knots Slack
Fri -- 06:25 AM EDT     Sunrise
Fri -- 08:22 AM EDT     2.40 knots Max Flood
Fri -- 09:31 AM EDT     Moonset
Fri -- 11:37 AM EDT     -0.00 knots Slack
Fri -- 02:21 PM EDT     -2.16 knots Max Ebb
Fri -- 05:27 PM EDT     0.00 knots Slack
Fri -- 06:39 PM EDT     Sunset
Fri -- 07:59 PM EDT     Moonrise
Fri -- 08:44 PM EDT     2.38 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Pollock Rip Channel, Massachusetts Current, knots
12
am
-1
1
am
-1.9
2
am
-2.2
3
am
-1.9
4
am
-1.2
5
am
-0.1
6
am
1
7
am
1.9
8
am
2.4
9
am
2.3
10
am
1.8
11
am
0.8
12
pm
-0.5
1
pm
-1.6
2
pm
-2.1
3
pm
-2
4
pm
-1.5
5
pm
-0.5
6
pm
0.6
7
pm
1.6
8
pm
2.3
9
pm
2.4
10
pm
2
11
pm
1.2


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GEOS Local Image of north east   
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Boston, MA,




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