Marine Weather and Tide Forecast for Somerville, MA
April 28, 2025 2:34 PM EDT (18:34 UTC)
Change Location
Change Location
 | Sunrise 5:41 AM Sunset 7:42 PM Moonrise 5:51 AM Moonset 9:22 PM |
ANZ230 Boston Harbor- 104 Pm Edt Mon Apr 28 2025
.small craft advisory in effect from Tuesday afternoon through Wednesday morning - .
This afternoon - NE winds 5 to 10 kt. Waves 1 foot or less.
Tonight - S winds around 5 kt. Waves 1 foot or less.
Tue - SW winds 5 to 10 kt, increasing to 15 to 20 kt in the afternoon. Gusts up to 25 kt. Waves around 2 ft.
Tue night - SW winds 15 to 20 kt with gusts up to 25 kt. Waves around 2 ft.
Wed and Wed night - N winds 15 to 20 kt. Waves around 2 ft.
Thu - E winds 5 to 10 kt. Waves 1 foot or less.
Thu night through Fri night - SW winds 10 to 15 kt with gusts up to 20 kt. Waves around 2 ft. A chance of showers.
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 104 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 Somerville, MA
NEW! Add second zone forecast
| Charles River Dam Click for Map Mon -- 05:43 AM EDT Sunrise Mon -- 05:51 AM EDT Moonrise Mon -- 06:13 AM EDT -1.90 feet Low Tide Mon -- 12:27 PM EDT 10.93 feet High Tide Mon -- 06:28 PM EDT -0.78 feet Low Tide Mon -- 07:40 PM EDT Sunset Mon -- 09:21 PM EDT Moonset Tide / Current data from XTide NOT FOR NAVIGATION |
Charles River Dam, Charles River, Massachusetts, Tide feet
| 12 am |
| 12.1 |
| 1 am |
| 11.1 |
| 2 am |
| 8.7 |
| 3 am |
| 5.7 |
| 4 am |
| 2.4 |
| 5 am |
| -0.4 |
| 6 am |
| -1.8 |
| 7 am |
| -1.3 |
| 8 am |
| 0.7 |
| 9 am |
| 3.5 |
| 10 am |
| 6.6 |
| 11 am |
| 9.3 |
| 12 pm |
| 10.8 |
| 1 pm |
| 10.7 |
| 2 pm |
| 9.2 |
| 3 pm |
| 6.8 |
| 4 pm |
| 3.9 |
| 5 pm |
| 1.2 |
| 6 pm |
| -0.6 |
| 7 pm |
| -0.5 |
| 8 pm |
| 1.3 |
| 9 pm |
| 4.1 |
| 10 pm |
| 7.2 |
| 11 pm |
| 10.1 |
| Boston Harbor Click for Map Mon -- 03:02 AM EDT -1.55 knots Max Ebb Mon -- 05:42 AM EDT Sunrise Mon -- 05:50 AM EDT Moonrise Mon -- 06:05 AM EDT 0.00 knots Slack Mon -- 08:52 AM EDT 1.48 knots Max Flood Mon -- 11:53 AM EDT -0.00 knots Slack Mon -- 03:18 PM EDT -1.40 knots Max Ebb Mon -- 06:22 PM EDT 0.00 knots Slack Mon -- 07:40 PM EDT Sunset Mon -- 09:03 PM EDT 1.57 knots Max Flood Mon -- 09:21 PM EDT Moonset Tide / Current data from XTide NOT FOR NAVIGATION |
Boston Harbor, Massachusetts Current, knots
| 12 am |
| -0.4 |
| 1 am |
| -1 |
| 2 am |
| -1.4 |
| 3 am |
| -1.5 |
| 4 am |
| -1.5 |
| 5 am |
| -1 |
| 6 am |
| -0.1 |
| 7 am |
| 0.9 |
| 8 am |
| 1.4 |
| 9 am |
| 1.5 |
| 10 am |
| 1.3 |
| 11 am |
| 0.7 |
| 12 pm |
| -0.1 |
| 1 pm |
| -0.8 |
| 2 pm |
| -1.2 |
| 3 pm |
| -1.4 |
| 4 pm |
| -1.4 |
| 5 pm |
| -1.1 |
| 6 pm |
| -0.4 |
| 7 pm |
| 0.7 |
| 8 pm |
| 1.4 |
| 9 pm |
| 1.6 |
| 10 pm |
| 1.5 |
| 11 pm |
| 1 |
FXUS61 KBOX 281725 AFDBOX
Area Forecast Discussion National Weather Service Boston/Norton MA 125 PM EDT Mon Apr 28 2025
SYNOPSIS
High pressure returns with dry conditions today. Dry and mild conditions continue Tuesday, but a cold front arrives mid week.
After a few showers late Tuesday into early Wednesday morning. A more prolonged period with a chance for showers late this week as a low pressure passes nearby. A cold front arrives mid week which will return temperatures to more seasonable conditions Thursday, then trend warmer Friday & Saturday.
NEAR TERM /THROUGH TONIGHT/
Key Messages...
* Warmer and less windy. Dry weather.
A ridge of high pressure overhead will keep winds light and return temperatures to many degrees warmer than average for late April, in in the low to mid 70s. The only exception will be Cape Cod and the islands where the ocean temperatures in the 40s will keep air temps in the 60s. High pressure centered to our south remains the dominant feature overnight but clear skies will becoming increasingly mixed with clouds as high level moisture moves in ahead of an approaching warm front.
SHORT TERM /TUESDAY/
Key messages...
* Dry and warmer with more clouds.
* Some scattered showers approach western MA by sunset.
Tuesday will be warmer as placement between the high pressure to our south and an encroaching trough of low pressure over the Great Lakes directs warm, southerly flow into SNE. This also tightens the pressure gradient generating a 30-40 kt LLJ overhead during the day.
Model soundings indicate an inversion around 900 mb, so expecting SW wind gusts of up to 30-35 mph. Some scattered showers out ahead of the cold front may hold together into far western SNE toward sunset but more likely that it is overnight, falling apart as it moves east.
LONG TERM /TUESDAY NIGHT THROUGH MONDAY/
Key Messages:
* Few showers are possible Tuesday night into Wednesday morning ahead of an approaching cold front. Otherwise dry Wednesday and Thursday.
* Near seasonable temperatures Thursday and Sunday, but more mild on Friday and Saturday. Rain chances return for early Friday and possibly again Saturday.
Tuesday Night to Thursday: While a few showers Tuesday night into Wednesday morning are possible, the best forcing with the cold front comes too late as the best moisture exits east of New England before the cold front arrives. The timing of the cold front will dictate the high temperatures for Wednesday, think it could be a slower and allow the coast plain to warm up nicely into the low and middle 70s, while those interior locations reach the middle 60s to low 70s. Cold front moves across the region and brings colder air across southern New England, widespread upper 30s to low 40s. Dry, cooler, but will be seasonable Thursday with highs in the lower to middle 60s.
Friday through Sunday: Unsettled conditions early Friday as a weak low pressure system passes to our northwest, think much of the steady rain falls predawn Friday and ends west to east mid to late morning. Friday is mild in the low to middle 70s. Another weak low pressure system moves through early Saturday but as this is almost a week out there is still lot of time for changes to change.
Temperatures on Saturday are in the upper 60s to low 70s. Sunday, a mid-level low could be in the vicinity of southern New England and may result in similar conditions to what we experienced this Sunday... cooler in the middle 60s with spot showers and breezy winds.
AVIATION /17Z MONDAY THROUGH FRIDAY/
Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent.
Through Tonight: High Confidence.
VFR. NW winds 5-10 kts. Gusts diminish this afternoon, and seabreeze develops over BOS by 20z. Winds shift W to SW before going calm across much of the region.
Tuesday: High Confidence.
VFR. SW winds 10-15 kts. Gusts to 25 kts.
Tuesday Night: High Confidence.
VFR. Some scattered light showers possible towards western MA.
Increasing cloud cover overnight. SW winds 10-15 kts, up to 20 kts on the Islands. Gusts to 25 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 IFR possible. Chance SHRA.
Friday: Mainly VFR, with local IFR possible. Breezy. Chance SHRA.
MARINE
Forecaster Confidence Levels:
Low - less than 30 percent.
Medium - 30 to 60 percent.
High - greater than 60 percent.
Today...
Winds continue to drop off during the day with the arrival of high pressure. Seas 2-4 ft.
Tonight...
Seas will 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.
Outlook /Tuesday Night through Saturday/...
Tuesday Night: Moderate risk for Small Craft Advisory winds with gusts up to 30 kt. Seas up to 5 ft. Slight chance of rain showers.
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. Chance of rain showers.
Friday: Winds less than 25 kt. Seas up to 5 ft. Chance of rain showers.
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 125 PM EDT Mon Apr 28 2025
SYNOPSIS
High pressure returns with dry conditions today. Dry and mild conditions continue Tuesday, but a cold front arrives mid week.
After a few showers late Tuesday into early Wednesday morning. A more prolonged period with a chance for showers late this week as a low pressure passes nearby. A cold front arrives mid week which will return temperatures to more seasonable conditions Thursday, then trend warmer Friday & Saturday.
NEAR TERM /THROUGH TONIGHT/
Key Messages...
* Warmer and less windy. Dry weather.
A ridge of high pressure overhead will keep winds light and return temperatures to many degrees warmer than average for late April, in in the low to mid 70s. The only exception will be Cape Cod and the islands where the ocean temperatures in the 40s will keep air temps in the 60s. High pressure centered to our south remains the dominant feature overnight but clear skies will becoming increasingly mixed with clouds as high level moisture moves in ahead of an approaching warm front.
SHORT TERM /TUESDAY/
Key messages...
* Dry and warmer with more clouds.
* Some scattered showers approach western MA by sunset.
Tuesday will be warmer as placement between the high pressure to our south and an encroaching trough of low pressure over the Great Lakes directs warm, southerly flow into SNE. This also tightens the pressure gradient generating a 30-40 kt LLJ overhead during the day.
Model soundings indicate an inversion around 900 mb, so expecting SW wind gusts of up to 30-35 mph. Some scattered showers out ahead of the cold front may hold together into far western SNE toward sunset but more likely that it is overnight, falling apart as it moves east.
LONG TERM /TUESDAY NIGHT THROUGH MONDAY/
Key Messages:
* Few showers are possible Tuesday night into Wednesday morning ahead of an approaching cold front. Otherwise dry Wednesday and Thursday.
* Near seasonable temperatures Thursday and Sunday, but more mild on Friday and Saturday. Rain chances return for early Friday and possibly again Saturday.
Tuesday Night to Thursday: While a few showers Tuesday night into Wednesday morning are possible, the best forcing with the cold front comes too late as the best moisture exits east of New England before the cold front arrives. The timing of the cold front will dictate the high temperatures for Wednesday, think it could be a slower and allow the coast plain to warm up nicely into the low and middle 70s, while those interior locations reach the middle 60s to low 70s. Cold front moves across the region and brings colder air across southern New England, widespread upper 30s to low 40s. Dry, cooler, but will be seasonable Thursday with highs in the lower to middle 60s.
Friday through Sunday: Unsettled conditions early Friday as a weak low pressure system passes to our northwest, think much of the steady rain falls predawn Friday and ends west to east mid to late morning. Friday is mild in the low to middle 70s. Another weak low pressure system moves through early Saturday but as this is almost a week out there is still lot of time for changes to change.
Temperatures on Saturday are in the upper 60s to low 70s. Sunday, a mid-level low could be in the vicinity of southern New England and may result in similar conditions to what we experienced this Sunday... cooler in the middle 60s with spot showers and breezy winds.
AVIATION /17Z MONDAY THROUGH FRIDAY/
Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent.
Through Tonight: High Confidence.
VFR. NW winds 5-10 kts. Gusts diminish this afternoon, and seabreeze develops over BOS by 20z. Winds shift W to SW before going calm across much of the region.
Tuesday: High Confidence.
VFR. SW winds 10-15 kts. Gusts to 25 kts.
Tuesday Night: High Confidence.
VFR. Some scattered light showers possible towards western MA.
Increasing cloud cover overnight. SW winds 10-15 kts, up to 20 kts on the Islands. Gusts to 25 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 IFR possible. Chance SHRA.
Friday: Mainly VFR, with local IFR possible. Breezy. Chance SHRA.
MARINE
Forecaster Confidence Levels:
Low - less than 30 percent.
Medium - 30 to 60 percent.
High - greater than 60 percent.
Today...
Winds continue to drop off during the day with the arrival of high pressure. Seas 2-4 ft.
Tonight...
Seas will 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.
Outlook /Tuesday Night through Saturday/...
Tuesday Night: Moderate risk for Small Craft Advisory winds with gusts up to 30 kt. Seas up to 5 ft. Slight chance of rain showers.
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. Chance of rain showers.
Friday: Winds less than 25 kt. Seas up to 5 ft. Chance of rain showers.
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 |
| BHBM3 - 8443970 - Boston, MA | 1 mi | 47 min | 70°F | 30.20 | ||||
| 44013 - BOSTON 16 NM East of Boston, MA | 22 mi | 35 min | SSW 3.9G | 55°F | 49°F | 30.22 | 47°F | |
| 44029 - Buoy A0102 - Mass. Bay/Stellwagen | 29 mi | 91 min | WNW 1.9G | 56°F | 2 ft | 30.18 | ||
| FOXR1 - 8454000 - Providence, RI | 43 mi | 47 min | NNW 9.9G | 72°F | 50°F | 30.22 | ||
| PVDR1 | 44 mi | 47 min | NNE 7G | 73°F | 30.23 | |||
| BLTM3 - 8447387 - Borden Flats Light at Fall River, MA | 46 mi | 47 min | N 5.1G | 72°F | 30.22 | |||
| FRVM3 - 8447386 - Fall River, MA | 46 mi | 47 min | 72°F | 55°F | 30.23 | |||
| CPTR1 - 8452944 - Conimicut Light, RI | 47 mi | 47 min | NW 8G | 67°F | 55°F | 30.22 | ||
| FRXM3 | 47 mi | 47 min | 68°F | 33°F | ||||
| IOSN3 - Isle of Shoals, NH | 48 mi | 35 min | SSE 5.1G | 62°F | 30.18 | 22°F | ||
| BGXN3 - Great Bay Reserve, NH | 49 mi | 50 min | W 5.1 | 70°F | 34°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 | 3 sm | 40 min | N 07 | 10 sm | A Few Clouds | 72°F | 32°F | 23% | 30.21 | |
| KBED LAURENCE G HANSCOM FLD,MA | 14 sm | 43 min | NNW 13 | 10 sm | Clear | 72°F | 30°F | 22% | 30.20 | |
| KOWD NORWOOD MEMORIAL,MA | 14 sm | 41 min | N 10G16 | 10 sm | Clear | 75°F | 28°F | 18% | 30.21 | |
| KBVY BEVERLY RGNL,MA | 17 sm | 41 min | N 08G20 | 10 sm | Clear | 72°F | 36°F | 27% | 30.19 | |
| KLWM LAWRENCE MUNI,MA | 24 sm | 40 min | NNE 06 | 10 sm | Clear | 72°F | 30°F | 22% | 30.22 |
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 north east
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Boston, MA,
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