Marine Weather and Tide Forecast for East Sandwich, MA
![]() | Sunrise 5:14 AM Sunset 8:18 PM Moonrise 8:43 PM Moonset 4:31 AM |
Marine Forecasts
NOTE: Zones were updated 3/20/2025. If your report is out of date, please click Edit
ANZ231 Cape Cod Bay- 107 Am Edt Thu Jul 10 2025
Rest of tonight - E winds around 5 kt. Seas 1 foot or less. Wave detail: N 1 foot at 3 seconds and S 1 foot at 7 seconds. Patchy fog. A chance of showers and tstms. Vsby 1 nm or less.
Thu - E winds 5 to 10 kt. Seas 1 foot or less, then around 2 ft in the afternoon. Wave detail: ne 1 foot at 3 seconds and S 1 foot at 7 seconds, becoming E 1 foot at 2 seconds and S 1 foot at 7 seconds. Patchy fog. Showers likely with a chance of tstms in the morning, then a chance of showers in the afternoon. Vsby 1 nm or less, increasing to 1 to 3 nm in the afternoon.
Thu night - NE winds 5 to 10 kt. Seas 1 foot or less. Wave detail: ne 1 foot at 2 seconds and S 1 foot at 7 seconds. Patchy fog. A chance of showers.
Fri - NE winds 5 to 10 kt. Seas 1 foot or less. Wave detail: ne 1 foot at 3 seconds and S 1 foot at 7 seconds. Patchy fog. Vsby 1 to 3 nm.
Fri night - SE winds 5 to 10 kt. Seas 1 foot or less. Wave detail: E 1 foot at 3 seconds and S 1 foot at 7 seconds. Patchy fog. Vsby 1 to 3 nm.
Sat and Sat night - SE winds 5 to 10 kt. Seas around 2 ft. Wave detail: E 1 foot at 2 seconds and se 1 foot at 7 seconds. Patchy fog. Vsby 1 nm or less.
Sun - SE winds 5 to 10 kt. Seas around 2 ft. Patchy fog. Vsby 1 nm or less.
Sun night through Mon night - SW winds 5 to 10 kt with gusts up to 20 kt. Seas around 2 ft. Patchy fog. Vsby 1 to 3 nm.
winds and seas higher in and near tstms.
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.
winds and seas higher in and near tstms.
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 107 Am Edt Thu Jul 10 2025
Synopsis for massachusetts and rhode island coastal waters - A nearly stationary front will continue to bring periods of showers and Thunderstorms through Thurs before it slips further southward on Fri. High pres then arrives this weekend.
7 Day Forecast for Marine Location Near East Sandwich, MA

NEW! Add second zone forecast
Cape Cod Canal (East Entrance) Click for Map Thu -- 04:32 AM EDT Moonset Thu -- 05:16 AM EDT Sunrise Thu -- 05:44 AM EDT 0.36 feet Low Tide Thu -- 12:01 PM EDT 7.90 feet High Tide Thu -- 04:38 PM EDT Full Moon Thu -- 05:50 PM EDT 1.27 feet Low Tide Thu -- 08:17 PM EDT Sunset Thu -- 08:43 PM EDT Moonrise Tide / Current data from XTide NOT FOR NAVIGATION |   |
Cape Cod Canal (East Entrance), Massachusetts, Tide feet
12 am |
9 |
1 am |
7.9 |
2 am |
6.2 |
3 am |
4.2 |
4 am |
2.2 |
5 am |
0.7 |
6 am |
0.4 |
7 am |
1.2 |
8 am |
2.5 |
9 am |
4.1 |
10 am |
5.9 |
11 am |
7.3 |
12 pm |
7.9 |
1 pm |
7.4 |
2 pm |
6.3 |
3 pm |
4.8 |
4 pm |
3.1 |
5 pm |
1.7 |
6 pm |
1.3 |
7 pm |
2.1 |
8 pm |
3.6 |
9 pm |
5.4 |
10 pm |
7.3 |
11 pm |
8.8 |
Cape Cod Canal Click for Map Thu -- 12:37 AM EDT -4.30 knots Max Ebb Thu -- 03:50 AM EDT 0.03 knots Slack Thu -- 04:32 AM EDT Moonset Thu -- 05:17 AM EDT Sunrise Thu -- 07:01 AM EDT 4.08 knots Max Flood Thu -- 10:26 AM EDT -0.19 knots Slack Thu -- 01:06 PM EDT -3.99 knots Max Ebb Thu -- 04:08 PM EDT 0.02 knots Slack Thu -- 04:38 PM EDT Full Moon Thu -- 07:06 PM EDT 3.80 knots Max Flood Thu -- 08:18 PM EDT Sunset Thu -- 08:43 PM EDT Moonrise Thu -- 10:18 PM EDT -0.08 knots Slack Tide / Current data from XTide NOT FOR NAVIGATION |   |
Cape Cod Canal, Massachusetts Current, knots
12 am |
-4.2 |
1 am |
-4.3 |
2 am |
-3.7 |
3 am |
-2.6 |
4 am |
1.2 |
5 am |
3.1 |
6 am |
3.8 |
7 am |
4.1 |
8 am |
3.9 |
9 am |
3.3 |
10 am |
2 |
11 am |
-2.2 |
12 pm |
-3.6 |
1 pm |
-4 |
2 pm |
-3.7 |
3 pm |
-2.9 |
4 pm |
-1.1 |
5 pm |
2.5 |
6 pm |
3.5 |
7 pm |
3.8 |
8 pm |
3.6 |
9 pm |
3 |
10 pm |
1.6 |
11 pm |
-2.5 |
FXUS61 KBOX 100734 AFDBOX
Area Forecast Discussion National Weather Service Boston/Norton MA 334 AM EDT Thu Jul 10 2025
SYNOPSIS
Moderate to heavy rain this morning, tapering off this afternoon. Not as warm today, but still very humid with dewpoints in the 70s. Warmer and drier conditions return Friday, continuing through the weekend before summertime heat and humidity make a return for the start of the week along with unsettled conditions.
NEAR TERM /UNTIL 6 PM THIS EVENING/
Key Points
* Heavy rain with localized flash flooding possible this morning into the early afternoon
* Isolated strong to severe thunderstorms possible across western MA and CT late this afternoon
A 500mb shortwave and surface low-pressure system will cross the region this morning. With strong lift from 850mb frontogenesis and PWATS approaching 2 inches, there will likely be very heavy rain this morning with localized flash flooding where stronger convection can develop. Opted to issue a flood watch this morning as HRRR 6hr PMM shows swaths of 2-4inches possible this morning across much of Eastern MA, CT, and much of RI. HRRR also shows moderate probs 30- 40% to exceed 10 year ARIs and low probs (5-10%) to exceed 100 year ARIs. Rain begins to taper off in the west to east today, lasting into the early evening hours across the Cape and Islands. If enough clearing can occur in western MA and CT, there could be some isolated strong to severe thunderstorms as roughly 500-100 J/kg of Cape builds. The best shear remains east of the instability axis, likely leading to pulse thunderstorms with the main threat being gusty winds. High temperatures stay in the 70s today with dewpoints around 70F as well.
SHORT TERM /6 PM THIS EVENING THROUGH 6 PM FRIDAY/
Key Points
* Mainly dry with warm and humid conditions
* Low chance for a isolated strong to severe thunderstorm across western MA and CT
The low-pressure system moves offshore with rising heights and drier air aloft moving in for Friday. Unfortunately, the drier air aloft is unlikely to bring relief to the 70-degree dewpoints on Friday.
High temperatures warm in the 80s with heat indices approaching 90F.
Skies start mostly cloudy Friday, but clouds begin to scatter out in the afternoon, which could allow for a couple of isolated thunderstorms to form if it can overcome the subsidence aloft.
Again, the environment supports the possibility for pulse severe thunderstorms with instability nearing 1000 J/kg, but with less than 30 knots of shear.
LONG TERM /FRIDAY NIGHT THROUGH WEDNESDAY/
Key Messages:
* Trending drier through the weekend * Summertime heat and humidity return early next week, with highs in the upper 80s to low 90s possible Monday through Wednesday * Daily chances for isolated, non-severe showers and thunderstorms
Saturday and Sunday
After a wet and unsettled week, we’ll begin transitioning to drier weather this weekend as an area of high pressure settles over the coastal waters to our east. This will support east/southeast flow through Sunday, resulting in relatively cooler temperatures (upper 70s to low 80s) east of I-495 along with sunny and dry conditions.
Across the interior, temperatures will be near normal, with daily highs in the mid to upper 80s. Elevated dewpoints in the upper 60s to low 70s will support diurnal instability west of I-495, leading to a slight chance of a pop-up afternoon shower or thunderstorm across the interior this weekend.
At this time, there are no signals indicating a risk for severe thunderstorms, as weak wind fields should suppress the wind shear needed to support deep moist convection. Any storms that do develop should collapse relatively quickly. Minimal, if any, thunderstorm activity is expected across eastern areas, as onshore flow/marine air should help stabilize the atmosphere.
Monday through Wednesday
Prevailing southwest flow returns on Monday, which will support rising temperatures across southern New England. Highs will reach the mid to upper 80s on Monday. A few scattered thunderstorms may also develop across the interior, as a pulse of shortwave energy could move through the Northeast Monday afternoon.
There is still no strong signal for the presence of deep-layer wind shear needed to support severe weather, but some uncertainty remains this far out.
By Tuesday, ensemble guidance suggests increasing heat, with a 40 to 50% chance of high temperatures exceeding 90 degrees across southern New England on both Tuesday and Wednesday. While there is no clear signal for widespread precipitation during the middle of next week, the typical slight chance for a diurnal thunderstorm remains possible.
Stay tuned for further details.
AVIATION /08Z THURSDAY THROUGH MONDAY/
Forecaster Confidence Levels...
Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent.
06Z TAF Update...
Tonight...Moderate to high confidence.
IFR/LIFR for much of the region, with low end MVFR/IFR in the CT river valley. Showers and thunderstorms have already begun to move into western MA. These cells will be capable of producing very heavy rain with near zero visibility. Heaviest rain should end across western terminals around sunrise, while arriving in eastern terminals between 09-11z.
Thursday...Moderate confidence.
IFR/LIFR with moderate to heavy rain with some embedded thunder continuing across eastern terminals through 12-15z, 15-18z for the Cape and Islands. Lingering light rain likely continues past 18z in the east, meanwhile, western terminals could see isolated thunderstorms in the late afternoon, closer to 20-23z.
Unlikely cloud cover clears enough across eastern terminals for afternoon thunderstorms.
Thursday Night...
IFR/LIFR ceilings return with light/variable easterly. Some showers/storms possible along the south coast.
KBOS Terminal...High Confidence
Ceilings coming down to LIFR with onshore flow. Moderate to heavy rain with embedded thunder possible this morning through about 16z, then lighter rain and IFR CIGS for the remainder of the day. LIFR possible again tonight with onshore flow
KBDL Terminal... High Confidence
MVFR/IFR this morning with moderate to heavy showers and thunderstorms through about sunrise, then lingering light showers though the rest of the morning. Isolated thunderstorms possible this afternoon, mainly after 20-21z.
Outlook /Friday Night through Monday/...
Friday Night: VFR.
Saturday: VFR. Slight chance SHRA, slight chance TSRA.
Saturday Night through Sunday: VFR.
Sunday Night: Mainly VFR, with local IFR possible. Slight chance SHRA.
Monday: Mainly VFR, with local MVFR possible. Chance SHRA, chance TSRA.
MARINE
Forecaster Confidence Levels...
Low - less than 30 percent.
Medium - 30 to 60 percent.
High - greater than 60 percent.
Thursday to Thursday Night: Moderate confidence.
Strong thunderstorms crossing the waters this morning. Gusts of 40-50 knots possible with heavy rain and near zero visibility.
Rain continues for much of the day, tapering off this evening.
Low clouds and fog continue through tonight.
Winds 10-15 kts out of the SSE on the southern waters and out of the E to NE on the eastern waters. Winds closer to the shores along the south coast may be more NE. Seas 2-4 ft.
Outlook /Friday Night through Monday/...
Winds less than 25 kt.
BOX WATCHES/WARNINGS/ADVISORIES
CT...None.
MA...None.
RI...None.
MARINE...None.
Area Forecast Discussion National Weather Service Boston/Norton MA 334 AM EDT Thu Jul 10 2025
SYNOPSIS
Moderate to heavy rain this morning, tapering off this afternoon. Not as warm today, but still very humid with dewpoints in the 70s. Warmer and drier conditions return Friday, continuing through the weekend before summertime heat and humidity make a return for the start of the week along with unsettled conditions.
NEAR TERM /UNTIL 6 PM THIS EVENING/
Key Points
* Heavy rain with localized flash flooding possible this morning into the early afternoon
* Isolated strong to severe thunderstorms possible across western MA and CT late this afternoon
A 500mb shortwave and surface low-pressure system will cross the region this morning. With strong lift from 850mb frontogenesis and PWATS approaching 2 inches, there will likely be very heavy rain this morning with localized flash flooding where stronger convection can develop. Opted to issue a flood watch this morning as HRRR 6hr PMM shows swaths of 2-4inches possible this morning across much of Eastern MA, CT, and much of RI. HRRR also shows moderate probs 30- 40% to exceed 10 year ARIs and low probs (5-10%) to exceed 100 year ARIs. Rain begins to taper off in the west to east today, lasting into the early evening hours across the Cape and Islands. If enough clearing can occur in western MA and CT, there could be some isolated strong to severe thunderstorms as roughly 500-100 J/kg of Cape builds. The best shear remains east of the instability axis, likely leading to pulse thunderstorms with the main threat being gusty winds. High temperatures stay in the 70s today with dewpoints around 70F as well.
SHORT TERM /6 PM THIS EVENING THROUGH 6 PM FRIDAY/
Key Points
* Mainly dry with warm and humid conditions
* Low chance for a isolated strong to severe thunderstorm across western MA and CT
The low-pressure system moves offshore with rising heights and drier air aloft moving in for Friday. Unfortunately, the drier air aloft is unlikely to bring relief to the 70-degree dewpoints on Friday.
High temperatures warm in the 80s with heat indices approaching 90F.
Skies start mostly cloudy Friday, but clouds begin to scatter out in the afternoon, which could allow for a couple of isolated thunderstorms to form if it can overcome the subsidence aloft.
Again, the environment supports the possibility for pulse severe thunderstorms with instability nearing 1000 J/kg, but with less than 30 knots of shear.
LONG TERM /FRIDAY NIGHT THROUGH WEDNESDAY/
Key Messages:
* Trending drier through the weekend * Summertime heat and humidity return early next week, with highs in the upper 80s to low 90s possible Monday through Wednesday * Daily chances for isolated, non-severe showers and thunderstorms
Saturday and Sunday
After a wet and unsettled week, we’ll begin transitioning to drier weather this weekend as an area of high pressure settles over the coastal waters to our east. This will support east/southeast flow through Sunday, resulting in relatively cooler temperatures (upper 70s to low 80s) east of I-495 along with sunny and dry conditions.
Across the interior, temperatures will be near normal, with daily highs in the mid to upper 80s. Elevated dewpoints in the upper 60s to low 70s will support diurnal instability west of I-495, leading to a slight chance of a pop-up afternoon shower or thunderstorm across the interior this weekend.
At this time, there are no signals indicating a risk for severe thunderstorms, as weak wind fields should suppress the wind shear needed to support deep moist convection. Any storms that do develop should collapse relatively quickly. Minimal, if any, thunderstorm activity is expected across eastern areas, as onshore flow/marine air should help stabilize the atmosphere.
Monday through Wednesday
Prevailing southwest flow returns on Monday, which will support rising temperatures across southern New England. Highs will reach the mid to upper 80s on Monday. A few scattered thunderstorms may also develop across the interior, as a pulse of shortwave energy could move through the Northeast Monday afternoon.
There is still no strong signal for the presence of deep-layer wind shear needed to support severe weather, but some uncertainty remains this far out.
By Tuesday, ensemble guidance suggests increasing heat, with a 40 to 50% chance of high temperatures exceeding 90 degrees across southern New England on both Tuesday and Wednesday. While there is no clear signal for widespread precipitation during the middle of next week, the typical slight chance for a diurnal thunderstorm remains possible.
Stay tuned for further details.
AVIATION /08Z THURSDAY THROUGH MONDAY/
Forecaster Confidence Levels...
Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent.
06Z TAF Update...
Tonight...Moderate to high confidence.
IFR/LIFR for much of the region, with low end MVFR/IFR in the CT river valley. Showers and thunderstorms have already begun to move into western MA. These cells will be capable of producing very heavy rain with near zero visibility. Heaviest rain should end across western terminals around sunrise, while arriving in eastern terminals between 09-11z.
Thursday...Moderate confidence.
IFR/LIFR with moderate to heavy rain with some embedded thunder continuing across eastern terminals through 12-15z, 15-18z for the Cape and Islands. Lingering light rain likely continues past 18z in the east, meanwhile, western terminals could see isolated thunderstorms in the late afternoon, closer to 20-23z.
Unlikely cloud cover clears enough across eastern terminals for afternoon thunderstorms.
Thursday Night...
IFR/LIFR ceilings return with light/variable easterly. Some showers/storms possible along the south coast.
KBOS Terminal...High Confidence
Ceilings coming down to LIFR with onshore flow. Moderate to heavy rain with embedded thunder possible this morning through about 16z, then lighter rain and IFR CIGS for the remainder of the day. LIFR possible again tonight with onshore flow
KBDL Terminal... High Confidence
MVFR/IFR this morning with moderate to heavy showers and thunderstorms through about sunrise, then lingering light showers though the rest of the morning. Isolated thunderstorms possible this afternoon, mainly after 20-21z.
Outlook /Friday Night through Monday/...
Friday Night: VFR.
Saturday: VFR. Slight chance SHRA, slight chance TSRA.
Saturday Night through Sunday: VFR.
Sunday Night: Mainly VFR, with local IFR possible. Slight chance SHRA.
Monday: Mainly VFR, with local MVFR possible. Chance SHRA, chance TSRA.
MARINE
Forecaster Confidence Levels...
Low - less than 30 percent.
Medium - 30 to 60 percent.
High - greater than 60 percent.
Thursday to Thursday Night: Moderate confidence.
Strong thunderstorms crossing the waters this morning. Gusts of 40-50 knots possible with heavy rain and near zero visibility.
Rain continues for much of the day, tapering off this evening.
Low clouds and fog continue through tonight.
Winds 10-15 kts out of the SSE on the southern waters and out of the E to NE on the eastern waters. Winds closer to the shores along the south coast may be more NE. Seas 2-4 ft.
Outlook /Friday Night through Monday/...
Winds less than 25 kt.
BOX WATCHES/WARNINGS/ADVISORIES
CT...None.
MA...None.
RI...None.
MARINE...None.
Stations | Dist | Age | Wind | Air | Water | Waves | inHg | DewPt |
44090 | 9 mi | 46 min | 67°F | 67°F | 0 ft | |||
44020 - NANTUCKET SOUND | 20 mi | 36 min | E 3.9G | 70°F | 73°F | 29.96 | ||
BZBM3 - 8447930 - Woods Hole, MA | 20 mi | 52 min | 71°F | 71°F | 29.99 | |||
NBGM3 | 26 mi | 52 min | SE 1.9G | 71°F | 29.99 | |||
CHTM3 | 27 mi | 52 min | 68°F | 29.99 | ||||
NTKM3 - 8449130 - Nantucket Island, MA | 37 mi | 52 min | S 1.9G | 71°F | 76°F | 29.99 | ||
FRVM3 - 8447386 - Fall River, MA | 38 mi | 52 min | 71°F | 75°F | 30.00 | |||
BLTM3 - 8447387 - Borden Flats Light at Fall River, MA | 39 mi | 52 min | E 5.1G | 71°F | 29.99 | |||
BUZM3 - Buzzards Bay, MA | 39 mi | 46 min | ESE 7G | 29.98 | ||||
FRXM3 | 39 mi | 52 min | 71°F | 70°F | ||||
44085 | 40 mi | 46 min | 67°F | 66°F | 3 ft | |||
44013 - BOSTON 16 NM East of Boston, MA | 43 mi | 36 min | E 1.9G | 66°F | 67°F | 30.00 | 66°F | |
CPTR1 - 8452944 - Conimicut Light, RI | 47 mi | 52 min | E 5.1G | 70°F | 76°F | 29.99 | ||
NAXR1 - Narragansett Bay Reserve, RI | 48 mi | 61 min | S 1.9 | 71°F | 29.98 | 71°F | ||
PTCR1 - 8452951 - Potter Cove, Prudence Island, RI | 48 mi | 52 min | SE 1.9G | 71°F | 29.98 | |||
NWPR1 - 8452660 - Newport, RI | 49 mi | 52 min | ESE 5.1G | 71°F | 69°F | 29.98 |
Wind History for Nantucket Island, MA
toggle option: (graph/table)
Airport Reports
Airport | Dist | Age | Wind kt | Vis | Sky | Weather | Air | DewPt | RH | inHg |
KFMH CAPE COD COAST GUARD AIR STATION,MA | 7 sm | 51 min | calm | 1/2 sm | Overcast | Fog | 70°F | 70°F | 100% | 30.00 |
KHYA BARNSTABLE MUNIBOARDMAN/POLANDO FIELD,MA | 11 sm | 14 min | calm | 1/4 sm | Overcast | Mist | 70°F | 70°F | 100% | 29.96 |
KPYM PLYMOUTH MUNI,MA | 19 sm | 35 min | calm | 3/4 sm | Overcast | Mist | 68°F | 66°F | 94% | 29.98 |
Link to 1 hour of 5 minute data for KFMH
Terminal Aerodrome Forecast (TAF) for KFMH
Wind History Graph: FMH
(wind in knots)GEOS Local Image of north east
Edit Hide
Boston, MA,

NOTICE: Some pages have affiliate links to Amazon. As an Amazon Associate, I earn from qualifying purchases. Please read website Cookie, Privacy, and Disclamers by clicking HERE. To contact me click HERE. For my YouTube page click HERE