West Dennis, MA Marine Weather and Tide Forecast
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Marine Weather and Tide Forecast for West Dennis, MA

May 15, 2024 3:10 AM EDT (07:10 UTC) Change Location
Sunrise 5:18 AM   Sunset 7:55 PM
Moonrise 12:10 PM   Moonset 1:57 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.

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Marine Forecasts
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ANZ232 Nantucket Sound- 105 Am Edt Wed May 15 2024

Rest of tonight - SW winds 5 to 10 kt. Seas around 2 ft. Wave detail: se 1 foot at 3 seconds and sw 1 foot at 4 seconds. Patchy fog. Vsby 1 to 3 nm.

Wed - S winds 5 to 10 kt. Seas around 2 ft in the morning, then 1 foot or less. Wave detail: S 1 foot at 4 seconds and E 1 foot at 8 seconds, becoming S 1 foot at 3 seconds and E 1 foot at 7 seconds. Patchy fog in the morning with vsby 1 nm or less.

Wed night - SE winds around 5 kt, becoming E 10 to 15 kt after midnight. Seas 2 to 3 ft. Wave detail: S 2 ft at 10 seconds and S 1 foot at 4 seconds. Patchy fog after midnight. A chance of showers after midnight.

Thu - E winds 10 to 15 kt, increasing to 15 to 20 kt in the afternoon. Gusts up to 25 kt. Seas 2 to 4 ft. Wave detail: se 3 ft at 4 seconds and S 2 ft at 10 seconds. Showers likely. Patchy fog in the morning.

Thu night - NE winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 4 ft. Wave detail: E 3 ft at 4 seconds and E 3 ft at 9 seconds. A chance of showers.

Fri and Fri night - NE winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. Wave detail: ne 3 ft at 4 seconds and E 3 ft at 9 seconds.

Sat through Sun night - NE winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 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 105 Am Edt Wed May 15 2024

Synopsis for massachusetts and rhode island coastal waters - High pres off the mid atlc seaboard will maintain modest ssw wind through Wed. A low pres should move E from the mid atlc coast Wed night into Thu, shifting winds to the se to E across the waters. This low pres slowly moves farther out to sea through Sat. Weak high pres expected across the waters for Sun.


7 Day Forecast for Marine Location Near West Dennis, MA
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Area Discussion for - Boston, MA
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FXUS61 KBOX 150544 AFDBOX

Area Forecast Discussion National Weather Service Boston/Norton MA 144 AM EDT Wed May 15 2024

SYNOPSIS
High pressure offshore provides mild conditions and mainly dry weather tonight and Wednesday. Although, can't rule out a few brief showers at any given time, especially across CT and western-central MA. Low pressure passing to our south will likely result in a period of showers for the first half of Thursday...at least south of the Massachusetts Turnpike.
Otherwise...dry weather should dominate Friday through the weekend other than a spot shower or two. Temperatures will average below normal especially along the immediate coast with onshore flow Thursday through the weekend...but a warming trend is expected early next week.

NEAR TERM /UNTIL 6 AM THIS MORNING/
10 PM Update...

No significant changes made to the forecast with this update.
Clouds, which yielded a brilliant sunset, continue to advance northeast while rain showers remain suppressed just southwest of our CWA Anticipating some light showers will make their way into central Connecticut before sunrise.

7 PM Update...

* Increasing clouds & mild overnight with lows in the 50s * A few showers possible toward daybreak in western MA/CT

Lingering upper level ridging across southern New England has kept the scattered diurnal showers to our north and west today.
This ridging will gradually slide further east tonight allowing for increasing mid-high level cloudiness to overspread the region from shortwave energy across the Ohio Valley.
Still expect dry weather to generally prevail...but warm advection will probably be enough for a few showers to develop toward daybreak across western MA/CT. Previous forecast handles this well in the next paragraph.

With sunset SSW winds will begin to diminish. Scattered showers over NYS will likely erode as the activity moves east into drier/more stable airmass over SNE. However, later tonight as closed low currently over TN/OH valley advects eastward, deepening moisture and forcing for ascent will increase somewhat, yielding a low risk for a few showers overnight across CT into western-central MA. Otherwise a dry and mild night ahead, with lows only in the 50s, above normal for mid May.

SHORT TERM /6 AM THIS MORNING THROUGH 6 PM THURSDAY/
Wednesday...

Enough ridging may linger for a mostly dry day, especially across RI and eastern MA. A few showers possible across CT into western-central MA, where some differential heating across the hilly terrain may be in play. Otherwise, a mainly dry day with even be some sunshine Wed across RI and eastern MA, more clouds westward into CT and western/central MA. This partial sunshine will combine with warm temps aloft and yield highs 70-75, 60s along the coast where light onshore flow/seabreeze develops. Dew pts in the 50s will also provide a mild feel to the airmass.

Wednesday night...

Closed low southwest of New England begins to circulate deeper moisture and low level easterly jet into CT/RI and southeast MA. This is where the risk of rain is highest. Some uncertainty how far north this rain shield will pivot, as mid level low tracks ESE. Thus, rain shield may remain south of the Mass Pike.
Mild temps continue with lows in the 50s. Light south winds become east by Thu morning.

LONG TERM /THURSDAY NIGHT THROUGH TUESDAY/
Key Points...

* Showers likely the first part of Thu at least south of I-90 * Highs Thu-Sun...55-65 on immediate coast & 65-75 distant interior * Mainly dry Fri/Sat/Sun...but clouds & a spot shower at times * Warming trend likely early next week

Details...

Thursday...

Low pressure will be passing south of the Benchmark on Thu. There is uncertainty with the northern extent of the rain shield especially given limited baroclinicity this time of year...it can often be quite challenging. Current thinking is that we probably will see a period of showers during the first part of Thu...at least to the south of I-90. Later shifts will need to make adjustments depending on model trends. Onshore flow will likely hold high temps in the upper 50s to the lower 60s on the immediate coast & 60s/near 70 further inland.

Friday/Saturday/Sunday...

High pressure over the Canadian Maritimes will combined with a distant offshore low pressure system...Fri into the weekend. This will generate an onshore flow and keep temps cool/below normal especially along the immediate coast
Further inland
temps more tricky and dependent on the amount of solar insolation. There might be clouds at times with the onshore flow...but also periods of sunshine as drier air may get circulated around the high pressure in the Maritimes
Therefore
thinking high temps generally in the 55 to 65 degree range along the immediate coast & between 65 and 75 across the distant interior.

High pressure nosing down from the Maritimes may be enough to keep most of the precipitation risk to our west and south Fri/Sat/Sun. We may see a spot shower or two...but overall thinking dry weather dominates.

Early Next Week...

There are some indications that the upper level energy to our south will weaken and also get suppressed further south. This should allow for some rising height fields and warming temperatures. There is uncertainty as to how quick and to what magnitude this process may occur...but thinking a warming trend is in the cards.

AVIATION /06Z WEDNESDAY THROUGH SUNDAY/
Forecast Confidence Levels:

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

06z TAF Update...

Wednesday...Moderate Confidence.

Scattered showers this morning with the most widespread activity centered across Connecticut and western MA. A very isolated rumble of thunder may accompany showers. Some localized fog/IFR also possible this morning along the south coast and islands. A broken deck of VFR- MVFR ceilings are expected with the tendency for the lower conditions to be colocated with shower activity. S winds 5 to 10 knots...but localized sea breezes are possible during the afternoon along portions of the immediate coast.

Wednesday night...Moderate Confidence.

Light S-SE winds become east overnight. VFR/MVFR conditions become MVFR overnight, as more organized rain shield comes onshore to the south coast of CT/RI/MA generally after 04Z. Localized IFR/LIFR possible. Forecast uncertainty in how far north this rain shield tracks overnight.

Thursday... Moderate Confidence

Uncertainty surrounds precipitation shield on Thursday but expecting widespread shower activity through at least 12Z.
Showers possible all day but chances diminish through the afternoon.
Generally MVFR with pockets of IFR, improving to VFR late Thursday.
Breezy winds from the ENE/E gusting to 25kt along the south coast.

KBOS TAF...Moderate confidence in TAF. Uncertainty regarding shower activity this morning and early afternoon but generally VFR.
Potential for an ESE sea breeze for a time this afternoon.
More widespread showers after 04Z Thursday as ENE flow develops.

KBDL TAF...Moderate confidence in TAF. VFR to MVFR today with shower activity possible at any time. More widespread rain moves into the terminal after 04Z tonight.

Outlook /Thursday Night through Sunday/...

Thursday Night: Mainly VFR, with areas MVFR possible. Breezy.
Chance SHRA.

Friday through Friday Night: VFR. Breezy.

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

Saturday Night: Mainly MVFR, with areas IFR possible. Breezy.
Slight chance SHRA.

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

MARINE
Forecaster Confidence Levels:

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

3 AM Update...

Wednesday...

Weak high pressure offshore results in light S-SE winds. Mainly dry weather and any morning fog burns off by midday with good vsby thereafter. Scattered showers across the southern waters.

Wednesday night...

Low pressure south of New England drifts north, with increasing east winds 15-20 kt toward Thu morning. Vsby lowers to 1-3 miles in areas of fog and rain, especially southern MA and RI waters.

Thursday...

E/ENE winds increase as low pressure tracks closer to SNE, gusts to 30kt possible. Areas of rough seas with increased rain chances.

Outlook /Thursday Night

Thursday Night: Low risk for Small Craft Advisory winds with gusts up to 30 kt. Areas of rough seas. Chance of rain showers.

Friday: Moderate risk for Small Craft Advisory winds with gusts up to 30 kt. Seas up to 5 ft. Slight chance of rain showers.

Friday Night: Low risk for Small Craft Advisory winds with gusts up to 25 kt. Seas up to 5 ft.

Saturday: Winds less than 25 kt. Seas up to 5 ft.

Saturday Night through Sunday: Winds less than 25 kt. Seas up to 5 ft. Slight chance of rain showers.

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




Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesinHgDewPt
CHTM3 12 mi53 min 56°F 58°F29.95
44020 - NANTUCKET SOUND 13 mi41 min S 5.8G7.8 55°F 55°F29.9454°F
44090 14 mi71 min 56°F 53°F1 ft
NTKM3 - 8449130 - Nantucket Island, MA 27 mi53 min SSW 5.1G8 55°F 57°F29.96
BZBM3 - 8447930 - Woods Hole, MA 28 mi53 min 55°F 55°F29.95
44018 - SE Cape Cod 30NM East of Nantucket, MA 37 mi61 min 50°F2 ft
NBGM3 38 mi53 min WSW 5.1G7 58°F 29.95
44085 49 mi71 min 55°F 54°F2 ft
BUZM3 - Buzzards Bay, MA 49 mi71 min WSW 4.1G5.1 55°F 29.97


Wind History for Nantucket Island, MA
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Airport Reports
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AirportDistAgeWind ktVisSkyWeatherTempDewPtRHinHg
KHYA BARNSTABLE MUNIBOARDMAN/POLANDO FIELD,MA 5 sm14 minSSW 0610 smClear57°F52°F82%29.94
KCQX CHATHAM MUNI,MA 10 sm18 minSW 0510 smClear55°F52°F88%29.95
KFMH CAPE COD COAST GUARD AIR STATION,MA 18 sm14 minWSW 0610 smClear57°F54°F88%29.96
Link to 5 minute data for KHYA


Wind History from HYA
(wind in knots)
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Tide / Current for South Yarmouth, Bass River, Nantucket Sound, Massachusetts
   
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South Yarmouth
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Wed -- 01:00 AM EDT     0.54 feet Low Tide
Wed -- 01:57 AM EDT     Moonset
Wed -- 05:20 AM EDT     Sunrise
Wed -- 07:19 AM EDT     2.77 feet High Tide
Wed -- 07:49 AM EDT     First Quarter
Wed -- 12:10 PM EDT     Moonrise
Wed -- 01:42 PM EDT     0.30 feet Low Tide
Wed -- 07:54 PM EDT     Sunset
Wed -- 08:06 PM EDT     2.52 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

South Yarmouth, Bass River, Nantucket Sound, Massachusetts, Tide feet
12
am
0.7
1
am
0.5
2
am
0.7
3
am
1
4
am
1.5
5
am
2
6
am
2.5
7
am
2.8
8
am
2.7
9
am
2.4
10
am
1.9
11
am
1.4
12
pm
0.8
1
pm
0.4
2
pm
0.3
3
pm
0.5
4
pm
0.9
5
pm
1.4
6
pm
1.9
7
pm
2.3
8
pm
2.5
9
pm
2.4
10
pm
2.1
11
pm
1.7


Tide / Current for Pollock Rip Channel, Massachusetts Current
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Pollock Rip Channel
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Wed -- 12:57 AM EDT     1.48 knots Max Flood
Wed -- 01:56 AM EDT     Moonset
Wed -- 03:48 AM EDT     -0.00 knots Slack
Wed -- 05:20 AM EDT     Sunrise
Wed -- 06:34 AM EDT     -1.37 knots Max Ebb
Wed -- 07:49 AM EDT     First Quarter
Wed -- 09:39 AM EDT     0.00 knots Slack
Wed -- 12:09 PM EDT     Moonrise
Wed -- 01:26 PM EDT     1.84 knots Max Flood
Wed -- 04:32 PM EDT     -0.00 knots Slack
Wed -- 07:22 PM EDT     -1.36 knots Max Ebb
Wed -- 07:53 PM EDT     Sunset
Wed -- 10:29 PM EDT     0.00 knots Slack
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
1.3
1
am
1.5
2
am
1.3
3
am
0.7
4
am
-0.2
5
am
-0.9
6
am
-1.3
7
am
-1.3
8
am
-1.1
9
am
-0.5
10
am
0.3
11
am
1
12
pm
1.5
1
pm
1.8
2
pm
1.8
3
pm
1.3
4
pm
0.5
5
pm
-0.4
6
pm
-1.1
7
pm
-1.3
8
pm
-1.3
9
pm
-1
10
pm
-0.3
11
pm
0.4


Weather Map
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GEOS Local Image of north east   
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Boston, MA,




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