Marine Weather and Tide Forecast for Boston, MA
May 1, 2024 3:22 PM EDT (19:22 UTC) Change Location
Sunrise 5:36 AM Sunset 7:45 PM Moonrise 2:26 AM Moonset 11:53 AM |
ANZ230 Boston Harbor- 106 Pm Edt Wed May 1 2024
This afternoon - E winds around 5 kt. Waves 1 foot or less.
Tonight - SE winds around 5 kt. Waves 1 foot or less.
Thu - S winds 5 to 10 kt. Waves 1 foot or less, then around 2 ft in the afternoon.
Thu night - NE winds 10 to 15 kt. Waves around 2 ft. A chance of showers in the evening.
Fri and Fri night - NE winds 10 to 15 kt. Waves around 2 ft. A chance of.
Sat through Sun night - S winds 5 to 10 kt. Waves around 2 ft. A chance of showers. A chance of.
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 105 Pm Edt Wed May 1 2024
Synopsis for massachusetts and rhode island coastal waters - Weak low pres will track south of new england today followed by a cold front from the west Thu. High pres over the maritimes will build south into new england Fri and Sat, then head to nova scotia Sun as another cold front crosses the region.
Area Discussion for - Boston, MA
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FXUS61 KBOX 011722 AFDBOX
Area Forecast Discussion National Weather Service Boston/Norton MA 122 PM EDT Wed May 1 2024
SYNOPSIS
Considerable cloudiness persists today, but peeks of sunshine are expected by early afternoon. A nearby front may bring a few showers near the coast Thursday. High pressure north of the region will bring dry and seasonable weather Friday and most of Saturday with onshore winds. An approaching front should bring showers late Saturday into Sunday. Dry and warmer weather is expected early next week.
NEAR TERM /UNTIL 6 PM THIS EVENING/
10AM Update
Today
The last of the showers are now moving offshore this morning, leaving only dreary low clouds in its wake. Expecting clouds to continue to linger today for much of the region, with the best chance for breaks of sun being across CT. If any sun can be realized, this would allow for 100-200 J/kg of surface based CAPE to build. Hi-res guidance has started to show isolated weak showers across western MA and CT, so added a 15% PoP for the afternoon.
Northerly flow behind the departing low will aide in advecting cooler air from the north over over eastern MA for this afternoon.
Further west however, a mid-level ridge axis at 850 hPa will build eastward into western MA and CT with substantially warmer temperatures. Locations east of the ridge axis that experience prevailing north/northwesterly winds will be substantially cooler than those locations beneath the ridge axis where 925 hPa temps will be in the 10 to 13C range. As a result of this setup, we expect there to be a rather tight temperature gradient from west to east this afternoon. Generally expect the coolest locations to be east of the I-495 corridor and the warmest locations west of I-495 and especially in the CT River Valley. The area of greatest temperature uncertainty will be along I-495 where temperatures will depend on how far west the cooler air mass from the north/northeast is able to penetrate. Best guess is for high temps in the low to mid 50s along the immediate east coastline and upper 60s to low 70s in the CT River Valley. Central MA and RI will range from the upper 50s to upper 60s with temperatures gradually increasing from west to east.
Expect cloud cover for most of the areas across eastern MA and RI with some breaks of sun likely for locations west of Worcester beginning in the early afternoon hours. While it is likely to be a dry day for most there is a low chance for a pop up shower or two.
SHORT TERM /6 PM THIS EVENING THROUGH 6 PM THURSDAY/
Tonight
Winds shift to the south overnight as weak surface high pressure builds east of southern New England. Generally expecting a quiet, cloudy, and seasonable night with lows in the mid to upper 40s.
Shower chances increase toward day break across eastern and northeastern MA as a short-wave trough originating from over Ontario digs south/southeast over southern New England.
Tomorrow
Somewhat of another tricky forecast tomorrow, particularly across eastern MA where some showers will be possible during the day. A broad upper-level ridge axis will be building in from the west with a warmer air mass tomorrow, but east of the ridge axis an embedded short-wave trough at 500 hPa will be digging southeast over southern New England. Vorticity advection east of the short-wave trough axis should provide enough forcing to support periods of rain across portions of New England tomorrow, but how far south these showers develop is still a challenge in the forecast. There is fair agreement in recent model guidance that the best forcing associated with this disturbance will stay to the north and east leaving most of southern New England dry. Eastern MA and The Cape/Islands will have greater chances for seeing some showers develop as the short- wave digs east over The Gulf of Maine this afternoon. Forcing and moisture are limited, so we have set PoPs between 20 and 40 percent for areas generally along and east of the I-95 corridor. High temps across eastern MA and The Cape/Islands will be cooler than the rest of southern New England thanks to the showers/cloud cover associated with the short-wave aloft, but interior MA is set to have a very warm day with highs getting into the low to mid 70s west of I-495.
LONG TERM /THURSDAY NIGHT THROUGH TUESDAY/
Key Points:
* Overall quiet weather pattern ahead * Scattered showers late Saturday into Sunday * Warmup early next week
Fairly good agreement among models that upper ridge will build over New England Fri and most of Sat maintaining dry weather. Normally we would expect a significant warmup but in the lower levels, high pressure to the north of the region will maintain an onshore flow of cooler air, even into the interior (though it will be warmer there).
There are some timing differences with respect to arrival of showers in Sat-Sun timeframe. 00z GFS is most aggressive and is an outlier when compared to its ensembles as well as other medium range models.
Additionally, it maintains upper ridge over SNE through most of day Sat which by pattern recognition would keep any showers to our west.
It does appear that scattered showers will arrive late in the day but especially Sat night into Sun as upper ridge shifts offshore and cold front approaches from Great Lakes.
Beyond the weekend, looks dry with springtime warmth early next week as high pressure builds offshore and brings milder S/SW flow, though usual south-facing coastlines along South Coast, Cape Cod, and Islands will be kept cooler with onshore flow. Our next chances for showers looks to be Wed as closed upper low lifts into Great Lakes and next cold front approaches SNE.
AVIATION /18Z WEDNESDAY THROUGH SUNDAY/
Forecast Confidence Levels:
Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent.
Rest of Today: Moderate Confidence
IFR ceilings continue to persist across NE MA. Expecting IFR CIGS to continue while winds remain ENE. Should see improvements to MVFR once winds shift SSW later this evening.
Ceilings continue to lift across SE MA, RI, but confidence on VFR vs MVFR is low. VFR for the CT river valley with a low chance for a isolated shower this afternoon.
Tonight: Moderate Confidence
VFR/MVFR becoming IFR/LIFR late overnight before sunrise.
Tomorrow: Moderate Confidence
Slow improvements of IFR to MVFR in the morning. A passing low could bring light rain esspically to NE terminals tomorrow morning into the afternoon. Western terminals will see CIGS reach VFR tomorrow afternoon, while eastern terminals, esspically Cape Cod and the Islands, could get stuck with MVFR/IFR.
Thursday Night: VFR/MVFR in the west, with IFR/LIFR filling back in the east.
KBOS TAF...Low confidence
Guidance is really struggling to maintain the IFR status deck thats been hanging around all day. With an ENE wind, not expecting much improvements to MVFR/VFR outside a brief breaks in the clouds. Winds should turn around to the SSW this evening which should help push CIGS back up into the MVFR range, but confidence is low to moderate at this time. Higher confidence at IFR/LIFR CIGS working back in overnight before sunrise, lasting into the late morning. A passing low could bring light showers tomorrow morning into the afternoon, but confidence was only high enough to include VCSH in the TAF at this time.
KBDL TAF...Moderate confidence.
The IFR status deck has cleared BDL, however stratocumulus are starting to form which may bring brief periods of MVFR this afternoon. There is a low chance for an isolated light shower this afternoon, but confidence was not high enough to include a VCSH in the TAF. Expecting CIGS to drop back to MVFR then IFR again overnight and improving again tomorrow morning with VFR again by tomorrow afternoon.
Outlook /Thursday Night through Sunday/...
Thursday Night: Mainly VFR, with local IFR possible. Slight chance SHRA.
Friday: Mainly VFR, with local MVFR possible. Slight chance SHRA.
Friday Night: VFR. Chance SHRA.
Saturday: Mainly VFR, with local MVFR possible. Chance SHRA.
Saturday Night through Sunday: Mainly VFR, with local IFR possible. Chance SHRA.
MARINE
Forecaster Confidence Levels:
Low - less than 30 percent.
Medium - 30 to 60 percent.
High - greater than 60 percent.
Today through Tomorrow
Low pressure moves east of the coastal waters today supporting northeast winds over the coastal waters for the first half of the day. As the day progresses, weak high pressure will build over the coastal waters leading to continued light/easterly flow across the marine zones. Overnight, winds shift to the south but remain modest around 5 to 10 knots. Winds increase out of the south/southwest tomorrow as an area of modest low-pressure moves over the coastal water. While winds will be stronger in the 10 to 12 knot range tomorrow, we don't anticipate conditions deteriorating enough to warrant SCY headlines. Seas will persistently be 2 feet or less through the end of the week.
Outlook /Thursday Night through Sunday/...
Thursday through Friday: Winds less than 25 kt. Slight chance of rain showers.
Friday Night: Winds less than 25 kt.
Saturday through Sunday: Winds less than 25 kt. Chance of rain showers.
BOX WATCHES/WARNINGS/ADVISORIES
CT...None.
MA...None.
RI...None.
MARINE...None.
Area Forecast Discussion National Weather Service Boston/Norton MA 122 PM EDT Wed May 1 2024
SYNOPSIS
Considerable cloudiness persists today, but peeks of sunshine are expected by early afternoon. A nearby front may bring a few showers near the coast Thursday. High pressure north of the region will bring dry and seasonable weather Friday and most of Saturday with onshore winds. An approaching front should bring showers late Saturday into Sunday. Dry and warmer weather is expected early next week.
NEAR TERM /UNTIL 6 PM THIS EVENING/
10AM Update
Today
The last of the showers are now moving offshore this morning, leaving only dreary low clouds in its wake. Expecting clouds to continue to linger today for much of the region, with the best chance for breaks of sun being across CT. If any sun can be realized, this would allow for 100-200 J/kg of surface based CAPE to build. Hi-res guidance has started to show isolated weak showers across western MA and CT, so added a 15% PoP for the afternoon.
Northerly flow behind the departing low will aide in advecting cooler air from the north over over eastern MA for this afternoon.
Further west however, a mid-level ridge axis at 850 hPa will build eastward into western MA and CT with substantially warmer temperatures. Locations east of the ridge axis that experience prevailing north/northwesterly winds will be substantially cooler than those locations beneath the ridge axis where 925 hPa temps will be in the 10 to 13C range. As a result of this setup, we expect there to be a rather tight temperature gradient from west to east this afternoon. Generally expect the coolest locations to be east of the I-495 corridor and the warmest locations west of I-495 and especially in the CT River Valley. The area of greatest temperature uncertainty will be along I-495 where temperatures will depend on how far west the cooler air mass from the north/northeast is able to penetrate. Best guess is for high temps in the low to mid 50s along the immediate east coastline and upper 60s to low 70s in the CT River Valley. Central MA and RI will range from the upper 50s to upper 60s with temperatures gradually increasing from west to east.
Expect cloud cover for most of the areas across eastern MA and RI with some breaks of sun likely for locations west of Worcester beginning in the early afternoon hours. While it is likely to be a dry day for most there is a low chance for a pop up shower or two.
SHORT TERM /6 PM THIS EVENING THROUGH 6 PM THURSDAY/
Tonight
Winds shift to the south overnight as weak surface high pressure builds east of southern New England. Generally expecting a quiet, cloudy, and seasonable night with lows in the mid to upper 40s.
Shower chances increase toward day break across eastern and northeastern MA as a short-wave trough originating from over Ontario digs south/southeast over southern New England.
Tomorrow
Somewhat of another tricky forecast tomorrow, particularly across eastern MA where some showers will be possible during the day. A broad upper-level ridge axis will be building in from the west with a warmer air mass tomorrow, but east of the ridge axis an embedded short-wave trough at 500 hPa will be digging southeast over southern New England. Vorticity advection east of the short-wave trough axis should provide enough forcing to support periods of rain across portions of New England tomorrow, but how far south these showers develop is still a challenge in the forecast. There is fair agreement in recent model guidance that the best forcing associated with this disturbance will stay to the north and east leaving most of southern New England dry. Eastern MA and The Cape/Islands will have greater chances for seeing some showers develop as the short- wave digs east over The Gulf of Maine this afternoon. Forcing and moisture are limited, so we have set PoPs between 20 and 40 percent for areas generally along and east of the I-95 corridor. High temps across eastern MA and The Cape/Islands will be cooler than the rest of southern New England thanks to the showers/cloud cover associated with the short-wave aloft, but interior MA is set to have a very warm day with highs getting into the low to mid 70s west of I-495.
LONG TERM /THURSDAY NIGHT THROUGH TUESDAY/
Key Points:
* Overall quiet weather pattern ahead * Scattered showers late Saturday into Sunday * Warmup early next week
Fairly good agreement among models that upper ridge will build over New England Fri and most of Sat maintaining dry weather. Normally we would expect a significant warmup but in the lower levels, high pressure to the north of the region will maintain an onshore flow of cooler air, even into the interior (though it will be warmer there).
There are some timing differences with respect to arrival of showers in Sat-Sun timeframe. 00z GFS is most aggressive and is an outlier when compared to its ensembles as well as other medium range models.
Additionally, it maintains upper ridge over SNE through most of day Sat which by pattern recognition would keep any showers to our west.
It does appear that scattered showers will arrive late in the day but especially Sat night into Sun as upper ridge shifts offshore and cold front approaches from Great Lakes.
Beyond the weekend, looks dry with springtime warmth early next week as high pressure builds offshore and brings milder S/SW flow, though usual south-facing coastlines along South Coast, Cape Cod, and Islands will be kept cooler with onshore flow. Our next chances for showers looks to be Wed as closed upper low lifts into Great Lakes and next cold front approaches SNE.
AVIATION /18Z WEDNESDAY THROUGH SUNDAY/
Forecast Confidence Levels:
Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent.
Rest of Today: Moderate Confidence
IFR ceilings continue to persist across NE MA. Expecting IFR CIGS to continue while winds remain ENE. Should see improvements to MVFR once winds shift SSW later this evening.
Ceilings continue to lift across SE MA, RI, but confidence on VFR vs MVFR is low. VFR for the CT river valley with a low chance for a isolated shower this afternoon.
Tonight: Moderate Confidence
VFR/MVFR becoming IFR/LIFR late overnight before sunrise.
Tomorrow: Moderate Confidence
Slow improvements of IFR to MVFR in the morning. A passing low could bring light rain esspically to NE terminals tomorrow morning into the afternoon. Western terminals will see CIGS reach VFR tomorrow afternoon, while eastern terminals, esspically Cape Cod and the Islands, could get stuck with MVFR/IFR.
Thursday Night: VFR/MVFR in the west, with IFR/LIFR filling back in the east.
KBOS TAF...Low confidence
Guidance is really struggling to maintain the IFR status deck thats been hanging around all day. With an ENE wind, not expecting much improvements to MVFR/VFR outside a brief breaks in the clouds. Winds should turn around to the SSW this evening which should help push CIGS back up into the MVFR range, but confidence is low to moderate at this time. Higher confidence at IFR/LIFR CIGS working back in overnight before sunrise, lasting into the late morning. A passing low could bring light showers tomorrow morning into the afternoon, but confidence was only high enough to include VCSH in the TAF at this time.
KBDL TAF...Moderate confidence.
The IFR status deck has cleared BDL, however stratocumulus are starting to form which may bring brief periods of MVFR this afternoon. There is a low chance for an isolated light shower this afternoon, but confidence was not high enough to include a VCSH in the TAF. Expecting CIGS to drop back to MVFR then IFR again overnight and improving again tomorrow morning with VFR again by tomorrow afternoon.
Outlook /Thursday Night through Sunday/...
Thursday Night: Mainly VFR, with local IFR possible. Slight chance SHRA.
Friday: Mainly VFR, with local MVFR possible. Slight chance SHRA.
Friday Night: VFR. Chance SHRA.
Saturday: Mainly VFR, with local MVFR possible. Chance SHRA.
Saturday Night through Sunday: Mainly VFR, with local IFR possible. Chance SHRA.
MARINE
Forecaster Confidence Levels:
Low - less than 30 percent.
Medium - 30 to 60 percent.
High - greater than 60 percent.
Today through Tomorrow
Low pressure moves east of the coastal waters today supporting northeast winds over the coastal waters for the first half of the day. As the day progresses, weak high pressure will build over the coastal waters leading to continued light/easterly flow across the marine zones. Overnight, winds shift to the south but remain modest around 5 to 10 knots. Winds increase out of the south/southwest tomorrow as an area of modest low-pressure moves over the coastal water. While winds will be stronger in the 10 to 12 knot range tomorrow, we don't anticipate conditions deteriorating enough to warrant SCY headlines. Seas will persistently be 2 feet or less through the end of the week.
Outlook /Thursday Night through Sunday/...
Thursday through Friday: Winds less than 25 kt. Slight chance of rain showers.
Friday Night: Winds less than 25 kt.
Saturday through Sunday: Winds less than 25 kt. Chance of rain showers.
BOX WATCHES/WARNINGS/ADVISORIES
CT...None.
MA...None.
RI...None.
MARINE...None.
Stations | Dist | Age | Wind | Air Temp | Water Temp | Waves | inHg | DewPt |
BHBM3 - 8443970 - Boston, MA | 2 mi | 52 min | 49°F | 29.98 | ||||
44013 - BOSTON 16 NM East of Boston, MA | 20 mi | 42 min | ENE 3.9G | 46°F | 47°F | 30.00 | 41°F | |
44029 - Buoy A0102 - Mass. Bay/Stellwagen | 27 mi | 138 min | E 5.8G | 46°F | 47°F | 2 ft | 29.99 | |
FOXR1 - 8454000 - Providence, RI | 43 mi | 52 min | N 4.1G | 61°F | 49°F | 29.95 | ||
PVDR1 | 44 mi | 52 min | NNW 5.1G | 63°F | 29.95 | 48°F | ||
BLTM3 - 8447387 - Borden Flats Light at Fall River, MA | 46 mi | 52 min | NE 6G | 62°F | 29.95 | |||
FRVM3 - 8447386 - Fall River, MA | 46 mi | 52 min | 61°F | 50°F | 29.96 | |||
44018 - SE Cape Cod 30NM East of Nantucket, MA | 47 mi | 72 min | 46°F | 3 ft | ||||
FRXM3 | 47 mi | 52 min | 59°F | 49°F | ||||
IOSN3 - Isle of Shoals, NH | 47 mi | 82 min | ESE 1.9G | 45°F | 29.98 | 40°F | ||
CPTR1 - 8452944 - Conimicut Light, RI | 48 mi | 52 min | SE 7G | 56°F | 51°F | 29.94 | ||
BGXN3 - Great Bay Reserve, NH | 49 mi | 97 min | SE 1 | 48°F | 29.98 | 44°F |
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Airport Reports
EDIT (hide/show)  Help Click EDIT to display multiple airports. Follow links for more data.Airport | Dist | Age | Wind kt | Vis | Sky | Weather | Temp | DewPt | RH | inHg |
KBOS GENERAL EDWARD LAWRENCE LOGAN INTL,MA | 1 sm | 28 min | E 06 | 10 sm | Overcast | 48°F | 45°F | 87% | 30.00 | |
KOWD NORWOOD MEMORIAL,MA | 14 sm | 29 min | var 06 | 10 sm | Overcast | 54°F | 45°F | 71% | 29.98 | |
KBED LAURENCE G HANSCOM FLD,MA | 16 sm | 31 min | ENE 06 | 10 sm | Overcast | 52°F | 46°F | 82% | 29.97 | |
KBVY BEVERLY RGNL,MA | 16 sm | 29 min | SSE 05 | 10 sm | Overcast | 46°F | 45°F | 93% | 29.99 |
Tide / Current for Charlestown, Charles River, Massachusetts
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Charlestown
Click for Map
Wed -- 02:26 AM EDT Moonrise
Wed -- 05:14 AM EDT 9.83 feet High Tide
Wed -- 05:38 AM EDT Sunrise
Wed -- 07:27 AM EDT Last Quarter
Wed -- 11:48 AM EDT 0.52 feet Low Tide
Wed -- 11:53 AM EDT Moonset
Wed -- 06:04 PM EDT 8.75 feet High Tide
Wed -- 07:44 PM EDT Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Wed -- 02:26 AM EDT Moonrise
Wed -- 05:14 AM EDT 9.83 feet High Tide
Wed -- 05:38 AM EDT Sunrise
Wed -- 07:27 AM EDT Last Quarter
Wed -- 11:48 AM EDT 0.52 feet Low Tide
Wed -- 11:53 AM EDT Moonset
Wed -- 06:04 PM EDT 8.75 feet High Tide
Wed -- 07:44 PM EDT Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Charlestown, Charles River, Massachusetts, Tide feet
12 am |
2.3 |
1 am |
3.9 |
2 am |
5.8 |
3 am |
7.5 |
4 am |
9 |
5 am |
9.8 |
6 am |
9.5 |
7 am |
8.2 |
8 am |
6.3 |
9 am |
4.3 |
10 am |
2.4 |
11 am |
0.9 |
12 pm |
0.6 |
1 pm |
1.4 |
2 pm |
3.1 |
3 pm |
4.9 |
4 pm |
6.7 |
5 pm |
8.1 |
6 pm |
8.7 |
7 pm |
8.3 |
8 pm |
7.1 |
9 pm |
5.4 |
10 pm |
3.8 |
11 pm |
2.3 |
Boston Harbor
Click for Map
Wed -- 01:23 AM EDT 1.09 knots Max Flood
Wed -- 02:25 AM EDT Moonrise
Wed -- 04:53 AM EDT -0.00 knots Slack
Wed -- 05:38 AM EDT Sunrise
Wed -- 07:27 AM EDT Last Quarter
Wed -- 08:06 AM EDT -1.00 knots Max Ebb
Wed -- 11:53 AM EDT Moonset
Wed -- 11:53 AM EDT 0.00 knots Slack
Wed -- 01:59 PM EDT 1.05 knots Max Flood
Wed -- 05:34 PM EDT -0.00 knots Slack
Wed -- 07:44 PM EDT Sunset
Wed -- 08:45 PM EDT -0.85 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Wed -- 01:23 AM EDT 1.09 knots Max Flood
Wed -- 02:25 AM EDT Moonrise
Wed -- 04:53 AM EDT -0.00 knots Slack
Wed -- 05:38 AM EDT Sunrise
Wed -- 07:27 AM EDT Last Quarter
Wed -- 08:06 AM EDT -1.00 knots Max Ebb
Wed -- 11:53 AM EDT Moonset
Wed -- 11:53 AM EDT 0.00 knots Slack
Wed -- 01:59 PM EDT 1.05 knots Max Flood
Wed -- 05:34 PM EDT -0.00 knots Slack
Wed -- 07:44 PM EDT Sunset
Wed -- 08:45 PM EDT -0.85 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Boston Harbor, Massachusetts Current, knots
12 am |
0.6 |
1 am |
1.1 |
2 am |
1 |
3 am |
0.8 |
4 am |
0.5 |
5 am |
-0.1 |
6 am |
-0.6 |
7 am |
-0.9 |
8 am |
-1 |
9 am |
-0.9 |
10 am |
-0.8 |
11 am |
-0.6 |
12 pm |
0.1 |
1 pm |
0.8 |
2 pm |
1 |
3 pm |
1 |
4 pm |
0.8 |
5 pm |
0.3 |
6 pm |
-0.2 |
7 pm |
-0.6 |
8 pm |
-0.8 |
9 pm |
-0.8 |
10 pm |
-0.8 |
11 pm |
-0.7 |
Boston, MA,
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