Marine Weather and Tide Forecast for East Dennis, MA
April 29, 2025 12:07 AM EDT (04:07 UTC)
Change Location
Change Location
 | Sunrise 5:37 AM Sunset 7:38 PM Moonrise 6:28 AM Moonset 10:37 PM |
ANZ231 Cape Cod Bay- 1005 Pm Edt Mon Apr 28 2025
.small craft advisory in effect from Tuesday afternoon through Wednesday morning - .
Overnight - SW winds 5 to 10 kt. Seas 1 foot or less. Wave detail: W 1 foot at 5 seconds and N 1 foot at 5 seconds.
Tue - SW winds 10 to 15 kt, increasing to 15 to 20 kt in the afternoon. Gusts up to 25 kt. Seas 1 foot or less, then 2 to 4 ft in the afternoon. Wave detail: sw 1 foot at 3 seconds and N 1 foot at 5 seconds, becoming sw 3 ft at 4 seconds and ne 1 foot at 5 seconds.
Tue night - SW winds 20 to 25 kt with gusts up to 30 kt. Seas 3 to 4 ft. Wave detail: sw 3 ft at 4 seconds and ne 1 foot at 4 seconds.
Wed - W winds 15 to 20 kt, becoming N 10 to 15 kt in the afternoon. Seas 2 to 3 ft. Wave detail: sw 3 ft at 5 seconds and E 1 foot at 9 seconds.
Wed night - N winds 5 to 10 kt. Seas around 2 ft. Wave detail: N 1 foot at 4 seconds and S 1 foot at 7 seconds.
Thu and Thu night - S winds 5 to 10 kt. Seas around 2 ft. Wave detail: N 1 foot at 5 seconds and S 1 foot at 6 seconds.
Fri through Sat night - W winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. A chance of rain.
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.
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 1005 Pm Edt Mon Apr 28 2025
Synopsis for massachusetts and rhode island coastal waters - Dry and less windy through tonight. Low pres returns mid week with sw winds and seas increasing Tue afternoon. Chance showers Tue night into early Wed. NExt system should arrive Thu night into Fri.
7 Day Forecast for Marine Location Near East Dennis, MA
NEW! Add second zone forecast
| South Yarmouth Click for Map Mon -- 01:31 AM EDT 3.65 feet High Tide Mon -- 05:41 AM EDT Sunrise Mon -- 05:49 AM EDT Moonrise Mon -- 07:54 AM EDT -0.68 feet Low Tide Mon -- 02:07 PM EDT 3.29 feet High Tide Mon -- 07:35 PM EDT Sunset Mon -- 08:08 PM EDT -0.33 feet Low Tide Mon -- 09:15 PM EDT Moonset Tide / Current data from XTide NOT FOR NAVIGATION |
South Yarmouth, Bass River, Nantucket Sound, Massachusetts, Tide feet
| 12 am |
| 3.1 |
| 1 am |
| 3.6 |
| 2 am |
| 3.6 |
| 3 am |
| 3.1 |
| 4 am |
| 2.3 |
| 5 am |
| 1.3 |
| 6 am |
| 0.3 |
| 7 am |
| -0.4 |
| 8 am |
| -0.7 |
| 9 am |
| -0.3 |
| 10 am |
| 0.4 |
| 11 am |
| 1.3 |
| 12 pm |
| 2.2 |
| 1 pm |
| 3 |
| 2 pm |
| 3.3 |
| 3 pm |
| 3.1 |
| 4 pm |
| 2.5 |
| 5 pm |
| 1.7 |
| 6 pm |
| 0.8 |
| 7 pm |
| 0 |
| 8 pm |
| -0.3 |
| 9 pm |
| -0.1 |
| 10 pm |
| 0.6 |
| 11 pm |
| 1.5 |
| Pollock Rip Channel Click for Map Mon -- 12:38 AM EDT -2.13 knots Max Ebb Mon -- 03:45 AM EDT 0.00 knots Slack Mon -- 05:40 AM EDT Sunrise Mon -- 05:49 AM EDT Moonrise Mon -- 07:05 AM EDT 2.40 knots Max Flood Mon -- 10:23 AM EDT -0.00 knots Slack Mon -- 01:06 PM EDT -2.09 knots Max Ebb Mon -- 04:14 PM EDT 0.00 knots Slack Mon -- 07:26 PM EDT 2.20 knots Max Flood Mon -- 07:34 PM EDT Sunset Mon -- 09:14 PM EDT Moonset Mon -- 10:38 PM EDT -0.00 knots Slack Tide / Current data from XTide NOT FOR NAVIGATION |
Pollock Rip Channel, Massachusetts Current, knots
| 12 am |
| -2 |
| 1 am |
| -2.1 |
| 2 am |
| -1.7 |
| 3 am |
| -0.8 |
| 4 am |
| 0.3 |
| 5 am |
| 1.4 |
| 6 am |
| 2.1 |
| 7 am |
| 2.4 |
| 8 am |
| 2.2 |
| 9 am |
| 1.6 |
| 10 am |
| 0.5 |
| 11 am |
| -0.8 |
| 12 pm |
| -1.7 |
| 1 pm |
| -2.1 |
| 2 pm |
| -1.9 |
| 3 pm |
| -1.2 |
| 4 pm |
| -0.3 |
| 5 pm |
| 0.8 |
| 6 pm |
| 1.7 |
| 7 pm |
| 2.2 |
| 8 pm |
| 2.1 |
| 9 pm |
| 1.7 |
| 10 pm |
| 0.8 |
| 11 pm |
| -0.4 |
FXUS61 KBOX 282341 AFDBOX
Area Forecast Discussion National Weather Service Boston/Norton MA 741 PM EDT Mon Apr 28 2025
SYNOPSIS
Dry conditions continue through tonight and Tuesday before the chance for some scattered showers develops near western MA Tuesday night. Breezy southwest winds and warmer Tuesday. Mainly dry conditions expected Wednesday behind the front with breezy northwest winds. Cooler air moves in by Thursday with seasonable temperatures. Next chance for showers arrives early Friday with a few rounds of showers possible Friday and another round of rain for Saturday. Temperatures trend slightly above normal.
Cold front moves in late Saturday bringing cooler temperatures for Sunday.
NEAR TERM /UNTIL 6 AM TUESDAY MORNING/
Key Messages...
* Winds die off and dry conditions continue
A mid-level ridge axis shifts east and winds will continue to diminish heading into the late afternoon and evening hours. High pressure remains centered just to our south. Winds go calm across the region overnight, and some high clouds from some upper level moisture will move in. Lows tonight are expected to be in the 40s and 50s.
SHORT TERM /6 AM TUESDAY MORNING THROUGH TUESDAY NIGHT/
Key Messages...
* Warmer and dry with increased cloud cover
* Scattered showers may arrive in western MA during the evening hours
Warmer weather is on tap for Tuesday as the center of high pressure remains to our south and low pressure towards the Great Lakes moves east. The result is southerly to southwesterly flow fueling WAA.
Winds tomorrow are also expected to be more substantial than today's due to the tightening pressure gradient and a LLJ aloft. Diurnal mixing will make gusts to around 30 mph a possibility across the region. Highs Tuesday are expected to be in the mid to upper 70s, with cooler temperatures along the Cape and Islands and the south coast where highs are expected to be in the mid 60s.
For Tuesday night, the warm front exits as the low's cold front start to approach the region, and some scattered showers in parts of western MA may pop up ahead of it. However, a lack of moisture may likely mitigate their development, especially going east. Winds shift more to the west before sunrise and cloud cover increases overnight. Lows are expected to be in the 50s across southern New England ahead of the cold front.
LONG TERM /WEDNESDAY THROUGH MONDAY/
Key Messages:
* Dry with marginally breezy NW winds Wednesday. Seasonable temperatures for Thursday.
* Slightly above normal temperatures Friday and Saturday. Chance for showers Friday and another round of rain for Saturday.
* Dry with seasonable temperatures Sunday.
Details...
Wednesday through Thursday:
By mid-morning Wednesday, a cold front will have pushed across southern New England. Northwest subsident flow will keep things dry with temperatures cooler than Tuesday. Although highs will likely still trend just a touch above normal in the mid to upper 60s and low to mid 60s for the Cape and Islands. Impactful winds are not expected, but can see breezy NW winds 20-25 mph, decreasing later in the afternoon as the pressure gradient relaxes.
An upper level ridge begins to build in Thursday bringing another dry day. A surface high positioned to the east will support light wind patterns with light E/SE flow and perhaps more southerly flow more inland. Temperatures will be more seasonable Thursday with highs in the 60s for most spots and upper 50s/low 60s for the Cape/Islands. Onshore flow may end up keeping it even a touch cooler for the immediate coastal areas.
Friday through Sunday:
Pattern becomes more unsettled by early Friday with a plume of above normal moisture advecting into southern New England ahead of a slow moving upper level trough. Ensemble guidance shows a weak shortwave trough moving through Friday, followed by another wave moving through sometime Saturday. This will bring a few rounds of showers late Thursday night through Friday. Details for the next wave are less certain (timing), but there will likely be another round of rainfall in the Saturday timeframe. Expect breezy SW to W winds during the day Saturday with gusts 20-25 mph. Temperatures lean above normal in the mid 60s to low 70s. Conditions gradually dry out Saturday night with a cold frontal passage.
Sunday trends drier with breezy northwest winds as a the main axis of the upper trough slides across southern New England. Cooler airmass behind the front will support highs around normal in the 60s. Residual moisture may support a few spot showers around during the day.
AVIATION /00Z TUESDAY THROUGH SATURDAY/
Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent.
00z TAF Update:
Tonight: High Confidence.
VFR. Winds shift W to SW and decrease to less than 8 kts this evening.
Tuesday: High Confidence.
VFR. SW winds 10-15 kts. Gusts 20-25 kts. Mid and high level clouds move in through the afternoon.
Tuesday Night: High Confidence.
VFR. Some scattered light showers possible towards western MA.
Increasing cloud cover overnight. A southerly low level jet moves in between 23-03z. Messaged in TAF for WS at WS020/24045kt. The Cape/Islands terminals may be a bit stronger. SW winds 10-15 kts. Gusts to 20-30 kts across the region possible.
KBOS TAF...High confidence in TAF.
KBDL TAF...High confidence in TAF.
Outlook /Wednesday through Saturday/...
Wednesday: VFR. Breezy.
Wednesday Night through Thursday: VFR.
Thursday Night: Mainly VFR, with local MVFR possible. Chance RA.
Friday: Mainly VFR, with local IFR possible. Breezy. Chance RA.
Friday Night through Saturday: Mainly VFR, with local MVFR possible. Breezy. Chance RA.
MARINE
Forecaster Confidence Levels:
Low - less than 30 percent.
Medium - 30 to 60 percent.
High - greater than 60 percent.
Tonight...
Seas further recede heading into tonight, with heights only up to 3 ft. Winds shift from NW to SW. Winds to 10 kt will be possible over the waters.
Tuesday...
SW winds increasing to 15-20 kts, gusting up to 30 kts. Seas increasing to 2-5 ft by afternoon.
Tuesday Night...
Seas begin to build back up to 4-7 ft by early Wednesday morning, and SW winds may gust to 25-30 kt. Sustained winds up to 25 kt over the waters in some areas.
Outlook /Wednesday through Saturday/...
Wednesday: Winds less than 25 kt. Local rough seas.
Wednesday Night: Winds less than 25 kt. Seas locally approaching 5 ft.
Thursday: Winds less than 25 kt.
Thursday Night: Winds less than 25 kt. Slight chance of rain.
Friday: Moderate risk for Small Craft Advisory winds with gusts up to 25 kt. Seas up to 5 ft. Slight chance of rain.
Friday Night: Low risk for Small Craft Advisory winds with gusts up to 25 kt. Seas up to 5 ft. Chance of rain.
Saturday: Winds less than 25 kt. Areas of rough seas. Chance of rain.
BOX WATCHES/WARNINGS/ADVISORIES
CT...None.
MA...None.
RI...None.
MARINE...Small Craft Advisory from 2 PM Tuesday to 8 AM EDT Wednesday for ANZ230>237-250-251-254>256.
Area Forecast Discussion National Weather Service Boston/Norton MA 741 PM EDT Mon Apr 28 2025
SYNOPSIS
Dry conditions continue through tonight and Tuesday before the chance for some scattered showers develops near western MA Tuesday night. Breezy southwest winds and warmer Tuesday. Mainly dry conditions expected Wednesday behind the front with breezy northwest winds. Cooler air moves in by Thursday with seasonable temperatures. Next chance for showers arrives early Friday with a few rounds of showers possible Friday and another round of rain for Saturday. Temperatures trend slightly above normal.
Cold front moves in late Saturday bringing cooler temperatures for Sunday.
NEAR TERM /UNTIL 6 AM TUESDAY MORNING/
Key Messages...
* Winds die off and dry conditions continue
A mid-level ridge axis shifts east and winds will continue to diminish heading into the late afternoon and evening hours. High pressure remains centered just to our south. Winds go calm across the region overnight, and some high clouds from some upper level moisture will move in. Lows tonight are expected to be in the 40s and 50s.
SHORT TERM /6 AM TUESDAY MORNING THROUGH TUESDAY NIGHT/
Key Messages...
* Warmer and dry with increased cloud cover
* Scattered showers may arrive in western MA during the evening hours
Warmer weather is on tap for Tuesday as the center of high pressure remains to our south and low pressure towards the Great Lakes moves east. The result is southerly to southwesterly flow fueling WAA.
Winds tomorrow are also expected to be more substantial than today's due to the tightening pressure gradient and a LLJ aloft. Diurnal mixing will make gusts to around 30 mph a possibility across the region. Highs Tuesday are expected to be in the mid to upper 70s, with cooler temperatures along the Cape and Islands and the south coast where highs are expected to be in the mid 60s.
For Tuesday night, the warm front exits as the low's cold front start to approach the region, and some scattered showers in parts of western MA may pop up ahead of it. However, a lack of moisture may likely mitigate their development, especially going east. Winds shift more to the west before sunrise and cloud cover increases overnight. Lows are expected to be in the 50s across southern New England ahead of the cold front.
LONG TERM /WEDNESDAY THROUGH MONDAY/
Key Messages:
* Dry with marginally breezy NW winds Wednesday. Seasonable temperatures for Thursday.
* Slightly above normal temperatures Friday and Saturday. Chance for showers Friday and another round of rain for Saturday.
* Dry with seasonable temperatures Sunday.
Details...
Wednesday through Thursday:
By mid-morning Wednesday, a cold front will have pushed across southern New England. Northwest subsident flow will keep things dry with temperatures cooler than Tuesday. Although highs will likely still trend just a touch above normal in the mid to upper 60s and low to mid 60s for the Cape and Islands. Impactful winds are not expected, but can see breezy NW winds 20-25 mph, decreasing later in the afternoon as the pressure gradient relaxes.
An upper level ridge begins to build in Thursday bringing another dry day. A surface high positioned to the east will support light wind patterns with light E/SE flow and perhaps more southerly flow more inland. Temperatures will be more seasonable Thursday with highs in the 60s for most spots and upper 50s/low 60s for the Cape/Islands. Onshore flow may end up keeping it even a touch cooler for the immediate coastal areas.
Friday through Sunday:
Pattern becomes more unsettled by early Friday with a plume of above normal moisture advecting into southern New England ahead of a slow moving upper level trough. Ensemble guidance shows a weak shortwave trough moving through Friday, followed by another wave moving through sometime Saturday. This will bring a few rounds of showers late Thursday night through Friday. Details for the next wave are less certain (timing), but there will likely be another round of rainfall in the Saturday timeframe. Expect breezy SW to W winds during the day Saturday with gusts 20-25 mph. Temperatures lean above normal in the mid 60s to low 70s. Conditions gradually dry out Saturday night with a cold frontal passage.
Sunday trends drier with breezy northwest winds as a the main axis of the upper trough slides across southern New England. Cooler airmass behind the front will support highs around normal in the 60s. Residual moisture may support a few spot showers around during the day.
AVIATION /00Z TUESDAY THROUGH SATURDAY/
Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent.
00z TAF Update:
Tonight: High Confidence.
VFR. Winds shift W to SW and decrease to less than 8 kts this evening.
Tuesday: High Confidence.
VFR. SW winds 10-15 kts. Gusts 20-25 kts. Mid and high level clouds move in through the afternoon.
Tuesday Night: High Confidence.
VFR. Some scattered light showers possible towards western MA.
Increasing cloud cover overnight. A southerly low level jet moves in between 23-03z. Messaged in TAF for WS at WS020/24045kt. The Cape/Islands terminals may be a bit stronger. SW winds 10-15 kts. Gusts to 20-30 kts across the region possible.
KBOS TAF...High confidence in TAF.
KBDL TAF...High confidence in TAF.
Outlook /Wednesday through Saturday/...
Wednesday: VFR. Breezy.
Wednesday Night through Thursday: VFR.
Thursday Night: Mainly VFR, with local MVFR possible. Chance RA.
Friday: Mainly VFR, with local IFR possible. Breezy. Chance RA.
Friday Night through Saturday: Mainly VFR, with local MVFR possible. Breezy. Chance RA.
MARINE
Forecaster Confidence Levels:
Low - less than 30 percent.
Medium - 30 to 60 percent.
High - greater than 60 percent.
Tonight...
Seas further recede heading into tonight, with heights only up to 3 ft. Winds shift from NW to SW. Winds to 10 kt will be possible over the waters.
Tuesday...
SW winds increasing to 15-20 kts, gusting up to 30 kts. Seas increasing to 2-5 ft by afternoon.
Tuesday Night...
Seas begin to build back up to 4-7 ft by early Wednesday morning, and SW winds may gust to 25-30 kt. Sustained winds up to 25 kt over the waters in some areas.
Outlook /Wednesday through Saturday/...
Wednesday: Winds less than 25 kt. Local rough seas.
Wednesday Night: Winds less than 25 kt. Seas locally approaching 5 ft.
Thursday: Winds less than 25 kt.
Thursday Night: Winds less than 25 kt. Slight chance of rain.
Friday: Moderate risk for Small Craft Advisory winds with gusts up to 25 kt. Seas up to 5 ft. Slight chance of rain.
Friday Night: Low risk for Small Craft Advisory winds with gusts up to 25 kt. Seas up to 5 ft. Chance of rain.
Saturday: Winds less than 25 kt. Areas of rough seas. Chance of rain.
BOX WATCHES/WARNINGS/ADVISORIES
CT...None.
MA...None.
RI...None.
MARINE...Small Craft Advisory from 2 PM Tuesday to 8 AM EDT Wednesday for ANZ230>237-250-251-254>256.
| Stations | Dist | Age | Wind | Air | Water | Waves | inHg | DewPt |
| 44090 | 11 mi | 97 min | 51°F | 47°F | ||||
| CHTM3 | 12 mi | 49 min | 54°F | 30.24 | ||||
| 44020 - NANTUCKET SOUND | 19 mi | 37 min | SSW 9.7G | 53°F | 51°F | 30.23 | 48°F | |
| BZBM3 - 8447930 - Woods Hole, MA | 31 mi | 49 min | 52°F | 51°F | 30.25 | |||
| NTKM3 - 8449130 - Nantucket Island, MA | 32 mi | 49 min | SSW 5.1G | 52°F | 54°F | 30.27 | ||
| NBGM3 | 40 mi | 49 min | SW 7G | 53°F | 30.24 | |||
| 44013 - BOSTON 16 NM East of Boston, MA | 49 mi | 37 min | S 7.8G | 49°F | 45°F | 30.19 | 42°F |
Wind History for Nantucket Island, MA
toggle option: (graph/table)
Link to 1 hour of 5 minute data for KHYA
Terminal Aerodrome Forecast (TAF) for KHYA
Wind History Graph: HYA
(wind in knots)
GEOS Local Image of Northeast
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