Marine Weather and Tide Forecast for Boston, MA
 | Sunrise 5:05 AM Sunset 8:25 PM Moonrise 12:14 AM Moonset 11:24 AM |
ANZ230 Boston Harbor- 405 Am Edt Tue Jun 17 2025
Today - SE winds 5 to 10 kt. Waves 1 foot or less, then around 2 ft this afternoon. A slight chance of showers this morning, then a chance of showers this afternoon. Vsby 1 nm or less this morning.
Tonight - SE winds 5 to 10 kt. Waves 1 foot or less. A chance of showers. Vsby 1 to 3 nm.
Wed - S winds 5 to 10 kt. Waves 1 foot or less, then around 2 ft in the afternoon. A chance of showers in the morning with vsby 1 to 3 nm.
Wed night - S winds 5 to 10 kt. Waves around 2 ft in the evening, then 1 foot or less. A chance of showers.
Thu and Thu night - W winds 10 to 15 kt with gusts up to 20 kt. Waves around 2 ft.
Fri through Sat night - SW winds 10 to 15 kt with gusts up to 20 kt. Waves around 2 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.
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 405 Am Edt Tue Jun 17 2025
Synopsis for massachusetts and rhode island coastal waters - High pressurewill move offshore Mon then another low pres will track S of the waters Tue. Weak high pres builds into the waters Wed. A cold front approaches the waters Thurs.
7 Day Forecast for Marine Location Near Boston, MA
NEW! Add second zone forecast
| Charlestown Click for Map Tue -- 12:14 AM EDT Moonrise Tue -- 04:03 AM EDT 10.03 feet High Tide Tue -- 05:06 AM EDT Sunrise Tue -- 10:28 AM EDT 0.17 feet Low Tide Tue -- 11:24 AM EDT Moonset Tue -- 04:43 PM EDT 9.46 feet High Tide Tue -- 08:23 PM EDT Sunset Tue -- 10:49 PM EDT 1.12 feet Low Tide Tide / Current data from XTide NOT FOR NAVIGATION |
Charlestown, Charles River, Massachusetts, Tide feet
| 12 am |
| 3.9 |
| 1 am |
| 6 |
| 2 am |
| 7.9 |
| 3 am |
| 9.4 |
| 4 am |
| 10 |
| 5 am |
| 9.5 |
| 6 am |
| 7.9 |
| 7 am |
| 5.8 |
| 8 am |
| 3.5 |
| 9 am |
| 1.6 |
| 10 am |
| 0.3 |
| 11 am |
| 0.4 |
| 12 pm |
| 1.8 |
| 1 pm |
| 3.8 |
| 2 pm |
| 5.9 |
| 3 pm |
| 7.8 |
| 4 pm |
| 9.1 |
| 5 pm |
| 9.4 |
| 6 pm |
| 8.5 |
| 7 pm |
| 6.9 |
| 8 pm |
| 4.9 |
| 9 pm |
| 3 |
| 10 pm |
| 1.6 |
| 11 pm |
| 1.1 |
| Boston Harbor Click for Map Tue -- 12:13 AM EDT Moonrise Tue -- 12:17 AM EDT 1.19 knots Max Flood Tue -- 03:44 AM EDT -0.00 knots Slack Tue -- 05:06 AM EDT Sunrise Tue -- 06:55 AM EDT -1.11 knots Max Ebb Tue -- 10:33 AM EDT 0.00 knots Slack Tue -- 11:23 AM EDT Moonset Tue -- 12:46 PM EDT 1.23 knots Max Flood Tue -- 04:17 PM EDT -0.00 knots Slack Tue -- 07:26 PM EDT -1.05 knots Max Ebb Tue -- 08:23 PM EDT Sunset Tue -- 10:59 PM EDT 0.00 knots Slack Tide / Current data from XTide NOT FOR NAVIGATION |
Boston Harbor, Massachusetts Current, knots
| 12 am |
| 1.2 |
| 1 am |
| 1.1 |
| 2 am |
| 0.9 |
| 3 am |
| 0.5 |
| 4 am |
| -0.2 |
| 5 am |
| -0.7 |
| 6 am |
| -1 |
| 7 am |
| -1.1 |
| 8 am |
| -1 |
| 9 am |
| -0.9 |
| 10 am |
| -0.4 |
| 11 am |
| 0.4 |
| 12 pm |
| 1.1 |
| 1 pm |
| 1.2 |
| 2 pm |
| 1.1 |
| 3 pm |
| 0.8 |
| 4 pm |
| 0.2 |
| 5 pm |
| -0.4 |
| 6 pm |
| -0.9 |
| 7 pm |
| -1 |
| 8 pm |
| -1 |
| 9 pm |
| -0.9 |
| 10 pm |
| -0.7 |
| 11 pm |
| 0 |
FXUS61 KBOX 170613 AFDBOX
Area Forecast Discussion National Weather Service Boston/Norton MA 213 AM EDT Tue Jun 17 2025
SYNOPSIS
A couple of weak disturbances will bring scattered showers at times late tonight into Wednesday with a few thunderstorms possible Wednesday. Cooler than normal temperatures Tuesday will be followed by a warming trend with hot and humid conditions Thursday. The heat and humidity will be accompanied by a chance of thunderstorms, some severe possible, late Thursday and Thursday evening ahead of a cold front. Then more seasonable and drier conditions follow for Friday and Saturday.
Looking ahead to early next week, it appears significant heat may impact southern New England.
NEAR TERM /UNTIL 6 AM THIS MORNING/
Key Messages:
* Stratus and patchy fog redeveloping
* Scattered showers possible late
Weak mid level ridging will set up over New Eng tonight with weak large scale subsidence for most of the night. However, deepening moisture plume approaches from the west ahead of a weak shortwave so scattered showers may develop late tonight from west to east.
Otherwise, ridging at the surface will extend west across SNE with continued low level SE flow providing abundant low level moisture.
Result will be stratus and patchy fog redeveloping and expanding across the region tonight. Lows will range from 55 to 60.
SHORT TERM /6 AM THIS MORNING THROUGH 6 PM WEDNESDAY/
Key Messages:
* Lots of clouds with scattered showers at times Tue and Tue night
* Below normal temps Tue but increasing humidity
Tuesday and Tuesday night...
Unsettled pattern developing as a couple weak shortwaves will be moving through. Meanwhile, an area of deep moisture sets up across SNE with anomalous PWAT plume increasing to 1.75 to 2 inches.
Forcing for ascent is weak but enough forcing acting on high moisture will lead to scattered showers moving through. Timing of these showers is uncertain and not expecting a washout, but there will be showers at times Tue into Tue night. Not expecting any thunder but may see some convective showers developing as stability decreases.
Otherwise, expect gloomy conditions with lots of stratus through the period. The cloud cover and SE flow will result in cooler than normal temps Tue with highs upper 60s to lower 70s. Dewpoints will be climbing into the low and mid 60s so there will be somewhat of a humid feel to the airmass. A milder night Tue night with lows in the lower 60s.
LONG TERM /WEDNESDAY NIGHT THROUGH MONDAY/
Key Messages:
* Becoming hotter each day through Thursday, then cooling off a bit Friday through the weekend before our hottest stretch of the year early next week.
* Severe weather possible on Thursday, greatest risk is damaging winds
* Dry Friday and Saturday but chance for some showers at some point in the weekend.
Wednesday and Thursday...
The return of more summer-like warmth comes Wednesday as southern New England will be sandwiched between high pressure over the Atlantic and low pressure moving through the Great Lakes. This places us beneath warm, moist SW flow until a cold front sweeps through late Thursday. Before this, 925 temps reach 20C on Wednesday and near 25C on Thursday which should lead to high temperatures in the 80s and upper 80s/low 90s respectively. It will also feel very humid as dewpoints surge into the upper 60s Wednesday and even low 70s potentially by Thursday. Not only will this increase the apparent temperatures, it will contribute to a great amount of instability on Thursday; guidance indicates several thousand J/kg of MUCAPE available. This, combined with mid level lapse rates approaching 7 c/km and 30-40 kts of 0-6 km bulk shear will lead to a decent chance of severe weather on Thursday. SREF guidance indicates a 40-50% probability of CAPE > 1000 J/kg and bulk shear >30kts, maximized over western and central SNE. Timing and severity will depend on several factors, including how quickly that cold front moves through. At this point the ECMWF would indicate a quicker passage, closer to the peak heating of the day while the GFS is slower, after sunset. Stay tuned.
Friday through early next week...
Friday into the weekend we'll be under drier W/NW flow and with a lingering trough/cyclonic flow aloft leading to some diurnal clouds Friday and potential for a weak shortwave moving through around late Saturday/early Sunday which may bring some showers but confidence is low at this point. What is more certain is that the pattern will be changing as we go into next week with high confidence of a building ridge and very hot temperatures for the first half of next week. At this point both the EPS and GEFS indicate a 70+% chance of 90+F on Monday and a near certainty by Tuesday.
AVIATION /06Z TUESDAY THROUGH SATURDAY/
Forecaster Confidence Levels...
Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent.
06z TAF Update:
Through 12z Tuesday: Low to moderate confidence.
A broad mix of VFR-MVFR with even some patchy IFR, with the lowest categories currently over the interior in some showers.
Forecast guidance has been poor in handling these observed conditions which renders a low-confidence forecast. Trend will be for deteriorating conditions where VFR currently exists toward at least widespread MVFR/intervals IFR by daybreak, with hit- or- miss light showers that won't restrict visby. Light E/SE winds.
Today: Moderate confidence.
Areas MVFR/IFR stratus should improve toward BKN-OVC MVFR bases.
After early-AM showers move east, best chance at hit-or-miss showers mainly interior but confidence in timing/coverage is low and may end up being dry for most of the day. SE to S winds under 10 kt.
Tonight: Moderate confidence.
Deteriorating conditions toward MVFR-IFR with patchy IFR-MVFR visby fog. A better chance at showers tonight and especially overnight, which continues to move east and offshore toward daybreak. SE to S winds 5 kt or less.
Wednesday: High confidence in trends but moderate on exact timing.
MVFR/IFR stratus from overnight scatters/lifts to BKN VFR bases, with showers ending early in the day. S/SW winds 5-10 kt.
KBOS Terminal...Moderate confidence in TAF. Current VFR should deteriorate to MVFR stratus after 08z but the timing and is low confidence. Categories should linger around MVFR levels most of the day with any showers being hit-or-miss. E/SE winds 5-10 kt.
KBDL Terminal...Moderate confidence in TAF. MVFR/psbl IFR cigs with -SHRA thru 16z, then improving to BKN MVFR bases. Light SE winds.
Outlook /Wednesday Night through Saturday/...
Wednesday: Mainly VFR, with local IFR possible. Chance SHRA, slight chance TSRA.
Wednesday Night: VFR. Slight chance SHRA, slight chance TSRA.
Juneteenth: VFR. Breezy. Slight chance SHRA, slight chance TSRA.
Thursday Night: VFR. Breezy. Slight chance SHRA.
Friday: VFR. Breezy.
Friday Night: VFR.
Saturday:
MARINE
Forecaster Confidence Levels...
Low - less than 30 percent.
Medium - 30 to 60 percent.
High - greater than 60 percent.
Tonight through Tuesday night...
Persistent E-SE winds through Tue gradually becoming more southerly Tue night. Speeds below 20 kt and seas 2-4 ft. Areas of fog developing tonight into Tue morning with more fog possible Tue night. Scattered showers at times Tue and Tue night.
Outlook /Wednesday Night through Saturday/...
Wednesday: Winds less than 25 kt. Seas locally approaching 5 ft. Slight chance of rain showers.
Wednesday Night: Winds less than 25 kt. Seas locally approaching 5 ft. Slight chance of rain showers, slight chance of thunderstorms.
Juneteenth: Low risk for Small Craft Advisory winds with gusts up to 25 kt. Areas of seas approaching 5 ft. Slight chance of rain showers.
Thursday Night: Moderate risk for Small Craft Advisory winds with gusts up to 25 kt. Seas up to 5 ft. Slight chance of rain showers.
Friday: Low risk for Small Craft Advisory winds with gusts up to 25 kt. Areas of seas approaching 5 ft.
Friday Night: Winds less than 25 kt. Areas of seas approaching 5 ft.
Saturday: 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 213 AM EDT Tue Jun 17 2025
SYNOPSIS
A couple of weak disturbances will bring scattered showers at times late tonight into Wednesday with a few thunderstorms possible Wednesday. Cooler than normal temperatures Tuesday will be followed by a warming trend with hot and humid conditions Thursday. The heat and humidity will be accompanied by a chance of thunderstorms, some severe possible, late Thursday and Thursday evening ahead of a cold front. Then more seasonable and drier conditions follow for Friday and Saturday.
Looking ahead to early next week, it appears significant heat may impact southern New England.
NEAR TERM /UNTIL 6 AM THIS MORNING/
Key Messages:
* Stratus and patchy fog redeveloping
* Scattered showers possible late
Weak mid level ridging will set up over New Eng tonight with weak large scale subsidence for most of the night. However, deepening moisture plume approaches from the west ahead of a weak shortwave so scattered showers may develop late tonight from west to east.
Otherwise, ridging at the surface will extend west across SNE with continued low level SE flow providing abundant low level moisture.
Result will be stratus and patchy fog redeveloping and expanding across the region tonight. Lows will range from 55 to 60.
SHORT TERM /6 AM THIS MORNING THROUGH 6 PM WEDNESDAY/
Key Messages:
* Lots of clouds with scattered showers at times Tue and Tue night
* Below normal temps Tue but increasing humidity
Tuesday and Tuesday night...
Unsettled pattern developing as a couple weak shortwaves will be moving through. Meanwhile, an area of deep moisture sets up across SNE with anomalous PWAT plume increasing to 1.75 to 2 inches.
Forcing for ascent is weak but enough forcing acting on high moisture will lead to scattered showers moving through. Timing of these showers is uncertain and not expecting a washout, but there will be showers at times Tue into Tue night. Not expecting any thunder but may see some convective showers developing as stability decreases.
Otherwise, expect gloomy conditions with lots of stratus through the period. The cloud cover and SE flow will result in cooler than normal temps Tue with highs upper 60s to lower 70s. Dewpoints will be climbing into the low and mid 60s so there will be somewhat of a humid feel to the airmass. A milder night Tue night with lows in the lower 60s.
LONG TERM /WEDNESDAY NIGHT THROUGH MONDAY/
Key Messages:
* Becoming hotter each day through Thursday, then cooling off a bit Friday through the weekend before our hottest stretch of the year early next week.
* Severe weather possible on Thursday, greatest risk is damaging winds
* Dry Friday and Saturday but chance for some showers at some point in the weekend.
Wednesday and Thursday...
The return of more summer-like warmth comes Wednesday as southern New England will be sandwiched between high pressure over the Atlantic and low pressure moving through the Great Lakes. This places us beneath warm, moist SW flow until a cold front sweeps through late Thursday. Before this, 925 temps reach 20C on Wednesday and near 25C on Thursday which should lead to high temperatures in the 80s and upper 80s/low 90s respectively. It will also feel very humid as dewpoints surge into the upper 60s Wednesday and even low 70s potentially by Thursday. Not only will this increase the apparent temperatures, it will contribute to a great amount of instability on Thursday; guidance indicates several thousand J/kg of MUCAPE available. This, combined with mid level lapse rates approaching 7 c/km and 30-40 kts of 0-6 km bulk shear will lead to a decent chance of severe weather on Thursday. SREF guidance indicates a 40-50% probability of CAPE > 1000 J/kg and bulk shear >30kts, maximized over western and central SNE. Timing and severity will depend on several factors, including how quickly that cold front moves through. At this point the ECMWF would indicate a quicker passage, closer to the peak heating of the day while the GFS is slower, after sunset. Stay tuned.
Friday through early next week...
Friday into the weekend we'll be under drier W/NW flow and with a lingering trough/cyclonic flow aloft leading to some diurnal clouds Friday and potential for a weak shortwave moving through around late Saturday/early Sunday which may bring some showers but confidence is low at this point. What is more certain is that the pattern will be changing as we go into next week with high confidence of a building ridge and very hot temperatures for the first half of next week. At this point both the EPS and GEFS indicate a 70+% chance of 90+F on Monday and a near certainty by Tuesday.
AVIATION /06Z TUESDAY THROUGH SATURDAY/
Forecaster Confidence Levels...
Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent.
06z TAF Update:
Through 12z Tuesday: Low to moderate confidence.
A broad mix of VFR-MVFR with even some patchy IFR, with the lowest categories currently over the interior in some showers.
Forecast guidance has been poor in handling these observed conditions which renders a low-confidence forecast. Trend will be for deteriorating conditions where VFR currently exists toward at least widespread MVFR/intervals IFR by daybreak, with hit- or- miss light showers that won't restrict visby. Light E/SE winds.
Today: Moderate confidence.
Areas MVFR/IFR stratus should improve toward BKN-OVC MVFR bases.
After early-AM showers move east, best chance at hit-or-miss showers mainly interior but confidence in timing/coverage is low and may end up being dry for most of the day. SE to S winds under 10 kt.
Tonight: Moderate confidence.
Deteriorating conditions toward MVFR-IFR with patchy IFR-MVFR visby fog. A better chance at showers tonight and especially overnight, which continues to move east and offshore toward daybreak. SE to S winds 5 kt or less.
Wednesday: High confidence in trends but moderate on exact timing.
MVFR/IFR stratus from overnight scatters/lifts to BKN VFR bases, with showers ending early in the day. S/SW winds 5-10 kt.
KBOS Terminal...Moderate confidence in TAF. Current VFR should deteriorate to MVFR stratus after 08z but the timing and is low confidence. Categories should linger around MVFR levels most of the day with any showers being hit-or-miss. E/SE winds 5-10 kt.
KBDL Terminal...Moderate confidence in TAF. MVFR/psbl IFR cigs with -SHRA thru 16z, then improving to BKN MVFR bases. Light SE winds.
Outlook /Wednesday Night through Saturday/...
Wednesday: Mainly VFR, with local IFR possible. Chance SHRA, slight chance TSRA.
Wednesday Night: VFR. Slight chance SHRA, slight chance TSRA.
Juneteenth: VFR. Breezy. Slight chance SHRA, slight chance TSRA.
Thursday Night: VFR. Breezy. Slight chance SHRA.
Friday: VFR. Breezy.
Friday Night: VFR.
Saturday:
MARINE
Forecaster Confidence Levels...
Low - less than 30 percent.
Medium - 30 to 60 percent.
High - greater than 60 percent.
Tonight through Tuesday night...
Persistent E-SE winds through Tue gradually becoming more southerly Tue night. Speeds below 20 kt and seas 2-4 ft. Areas of fog developing tonight into Tue morning with more fog possible Tue night. Scattered showers at times Tue and Tue night.
Outlook /Wednesday Night through Saturday/...
Wednesday: Winds less than 25 kt. Seas locally approaching 5 ft. Slight chance of rain showers.
Wednesday Night: Winds less than 25 kt. Seas locally approaching 5 ft. Slight chance of rain showers, slight chance of thunderstorms.
Juneteenth: Low risk for Small Craft Advisory winds with gusts up to 25 kt. Areas of seas approaching 5 ft. Slight chance of rain showers.
Thursday Night: Moderate risk for Small Craft Advisory winds with gusts up to 25 kt. Seas up to 5 ft. Slight chance of rain showers.
Friday: Low risk for Small Craft Advisory winds with gusts up to 25 kt. Areas of seas approaching 5 ft.
Friday Night: Winds less than 25 kt. Areas of seas approaching 5 ft.
Saturday: 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 |
| BHBM3 - 8443970 - Boston, MA | 2 mi | 47 min | 60°F | 30.11 | ||||
| 44013 - BOSTON 16 NM East of Boston, MA | 20 mi | 37 min | E 5.8G | 60°F | 60°F | 30.11 | 59°F | |
| 44029 - Buoy A0102 - Mass. Bay/Stellwagen | 27 mi | 77 min | SE 5.8G | 60°F | ||||
| FOXR1 - 8454000 - Providence, RI | 43 mi | 47 min | E 4.1G | 62°F | 63°F | 30.10 | ||
| PVDR1 | 44 mi | 47 min | NE 1.9G | 62°F | 30.11 | |||
| BLTM3 - 8447387 - Borden Flats Light at Fall River, MA | 46 mi | 47 min | NE 6G | 63°F | 30.11 | |||
| FRVM3 - 8447386 - Fall River, MA | 46 mi | 47 min | 63°F | 64°F | 30.11 | |||
| FRXM3 | 47 mi | 47 min | 63°F | 60°F | ||||
| IOSN3 - Isle of Shoals, NH | 47 mi | 77 min | SE 4.1G | 60°F | 30.11 | 60°F | ||
| CPTR1 - 8452944 - Conimicut Light, RI | 48 mi | 47 min | NE 6G | 62°F | 66°F | 30.10 | ||
| BGXN3 - Great Bay Reserve, NH | 49 mi | 92 min | E 1 | 58°F | 57°F |
Wind History for Providence, RI
toggle option: (graph/table)
| Airport | Dist | Age | Wind kt | Vis | Sky | Weather | Air | DewPt | RH | inHg |
| KBOS GENERAL EDWARD LAWRENCE LOGAN INTL,MA | 1 sm | 22 min | E 04 | 10 sm | Overcast | 61°F | 57°F | 88% | 30.12 | |
| KOWD NORWOOD MEMORIAL,MA | 14 sm | 23 min | E 03 | 10 sm | Overcast | 61°F | 57°F | 88% | 30.11 | |
| KBED LAURENCE G HANSCOM FLD,MA | 16 sm | 25 min | no data | -- | 30.10 | |||||
| KBVY BEVERLY RGNL,MA | 16 sm | 23 min | E 03 | 10 sm | Overcast | 59°F | 59°F | 100% | 30.11 |
Link to 1 hour of 5 minute data for KBOS
Terminal Aerodrome Forecast (TAF) for KBOS
Wind History Graph: BOS
(wind in knots)
GEOS Local Image of Northeast
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Boston, MA,
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