Coastal Waters Forecast
Issued by NWS Boston, MA

Current Version | Previous Version | Graphics & Text | Print | Product List | Glossary Off
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
000 FZUS51 KBOX 271402 CWFBOX Coastal Waters Forecast for Massachusetts and Rhode Island National Weather Service Boston/Norton MA 1001 AM EDT Wed Mar 27 2024 Coastal waters from the Merrimack River MA to Watch Hill RI out to 25 NM ANZ200-280300- 1001 AM EDT Wed Mar 27 2024 .Synopsis for Massachusetts and Rhode Island coastal waters... Winds gradually diminishing today with slowly subsiding seas. Thursday, developing low pressure emerges off the Mid Atlantic coast, possibly intensifying into a gale center Friday, as it tracks southeast of the 40N/70W benchmark. NW gales may follow later Friday into Saturday across the MA/RI waters. Winds should diminish Sunday as high pressure builds into New England. $$ ANZ250-280300- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 1001 AM EDT Wed Mar 27 2024 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH THURSDAY MORNING... .THIS AFTERNOON...N winds 5 to 10 kt. Seas 5 to 7 ft. Patchy fog. Vsby 1 NM or less. .TONIGHT...NE winds around 5 kt. Seas 4 to 6 ft. Patchy fog. Rain likely after midnight. Vsby 1 NM or less. .THU...N winds around 5 kt. Seas 4 to 6 ft. Patchy fog. Rain. Vsby 1 NM or less. .THU NIGHT...N winds 10 to 15 kt, increasing to 15 to 20 kt with gusts up to 25 kt after midnight. Seas 4 to 6 ft. Patchy fog. Rain. Vsby 1 NM or less, increasing to 1 to 3 NM after midnight. .FRI...NW winds 20 to 25 kt with gusts up to 30 kt. Seas 5 to 7 ft. Rain likely, mainly in the morning. Patchy fog in the morning with vsby 1 to 3 NM. .FRI NIGHT...NW winds 25 to 30 kt with gusts up to 45 kt. Seas 5 to 8 ft. A chance of rain in the evening. .SAT...NW winds 25 to 30 kt with gusts up to 45 kt. Seas 5 to 7 ft. .SAT NIGHT...NW winds 15 to 20 kt with gusts up to 30 kt. Seas 4 to 6 ft. .SUN AND SUN NIGHT...NW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ251-280300- Massachusetts Bay and Ipswich Bay- 1001 AM EDT Wed Mar 27 2024 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH THURSDAY MORNING... .THIS AFTERNOON...N winds 5 to 10 kt. Seas 3 to 5 ft. Patchy fog. Vsby 1 NM or less. .TONIGHT...E winds around 5 kt. Seas 2 to 4 ft. Patchy fog. A chance of rain in the evening, then rain likely after midnight with vsby 1 NM or less. .THU...N winds around 5 kt. Seas 2 to 4 ft. Patchy fog. Rain. Vsby 1 NM or less. .THU NIGHT...N winds 5 to 10 kt, increasing to 15 to 20 kt with gusts up to 25 kt after midnight. Seas 2 to 4 ft. Patchy fog. Rain. Vsby 1 NM or less, increasing to 1 to 3 NM after midnight. .FRI...NW winds 20 to 25 kt. Seas 3 to 5 ft. Rain likely, mainly in the morning. Patchy fog in the morning with vsby 1 to 3 NM. .FRI NIGHT...NW winds 25 to 30 kt with gusts up to 40 kt. Seas 4 to 5 ft. A chance of rain in the evening. .SAT...NW winds 25 to 30 kt with gusts up to 40 kt. Seas 3 to 5 ft. .SAT NIGHT AND SUN...W winds 15 to 20 kt, becoming NW 10 to 15 kt. Gusts up to 30 kt. Seas 2 to 4 ft. .SUN NIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas 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. $$ ANZ231-280300- Cape Cod Bay- 1001 AM EDT Wed Mar 27 2024 .THIS AFTERNOON...N winds 5 to 10 kt. Seas 2 to 4 ft. Patchy fog. Vsby 1 NM or less. .TONIGHT...NE winds around 5 kt. Seas 2 to 3 ft. Patchy fog. Rain likely after midnight. Vsby 1 to 3 NM, decreasing to 1 NM or less after midnight. .THU...N winds around 5 kt. Seas around 2 ft. Patchy fog. Rain. Vsby 1 NM or less. .THU NIGHT...N winds 5 to 10 kt, increasing to 15 to 20 kt with gusts up to 25 kt after midnight. Seas 2 to 4 ft. Patchy fog. Rain. Vsby 1 NM or less, increasing to 1 to 3 NM after midnight. .FRI...N winds 20 to 25 kt, becoming NW 15 to 20 kt in the afternoon. Seas 3 to 5 ft. Rain likely, mainly in the morning. Patchy fog in the morning with vsby 1 to 3 NM. .FRI NIGHT...NW winds 20 to 25 kt, increasing to 25 to 30 kt after midnight. Gusts up to 40 kt. Seas 4 to 6 ft. A chance of rain in the evening. .SAT...NW winds 25 to 30 kt with gusts up to 40 kt. Seas 4 to 6 ft. .SAT NIGHT AND SUN...NW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. .SUN NIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ254-280300- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm- 1001 AM EDT Wed Mar 27 2024 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH THURSDAY MORNING... .THIS AFTERNOON...N winds around 5 kt. Seas 5 to 7 ft. Patchy fog. Vsby 1 NM or less. .TONIGHT...NE winds around 5 kt. Seas 5 to 7 ft. Patchy fog. Rain after midnight. Vsby 1 NM or less. .THU...N winds 5 to 10 kt. Seas 4 to 6 ft. Patchy fog. Rain. Vsby 1 NM or less. .THU NIGHT...N winds around 10 kt, increasing to 15 to 20 kt with gusts up to 25 kt after midnight. Seas 5 to 7 ft. Patchy fog. Rain. Vsby 1 NM or less, increasing to 1 to 3 NM after midnight. .FRI...N winds 20 to 25 kt with gusts up to 30 kt. Seas 5 to 8 ft. Rain. Patchy fog in the morning with vsby 1 to 3 NM. .FRI NIGHT...NW winds 25 to 30 kt. Gusts up to 45 kt after midnight. Seas 6 to 9 ft. A chance of rain in the evening. .SAT...W winds 25 to 30 kt with gusts up to 45 kt. Seas 6 to 9 ft. .SAT NIGHT...W winds 15 to 20 kt with gusts up to 30 kt. Seas 5 to 7 ft. .SUN AND SUN NIGHT...NW winds 10 to 15 kt with gusts up to 25 kt. Seas 3 to 5 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. $$ ANZ255-280300- Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket- 1001 AM EDT Wed Mar 27 2024 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH THURSDAY MORNING... .THIS AFTERNOON...N winds 5 to 10 kt. Seas 4 to 6 ft. Patchy fog. Vsby 1 NM or less. .TONIGHT...NE winds around 5 kt. Seas 4 to 6 ft. Patchy fog. Rain likely after midnight. Vsby 1 NM or less. .THU...N winds 5 to 10 kt. Seas 3 to 5 ft. Patchy fog. Rain. Vsby 1 NM or less. .THU NIGHT...N winds 10 to 15 kt with gusts up to 20 kt, increasing to 20 to 25 kt with gusts up to 30 kt after midnight. Seas 4 to 6 ft. Patchy fog. Rain. Vsby 1 NM or less, increasing to 1 to 3 NM after midnight. .FRI...N winds 25 to 30 kt, becoming NW 20 to 25 kt in the afternoon. Seas 5 to 7 ft. Rain likely, mainly in the morning. Patchy fog in the morning with vsby 1 to 3 NM. .FRI NIGHT...NW winds 25 to 30 kt, increasing to 30 to 35 kt after midnight. Seas 5 to 8 ft. A chance of rain in the evening. .SAT...W winds 25 to 35 kt with gusts up to 40 kt. Seas 5 to 8 ft. .SAT NIGHT...W winds 15 to 20 kt with gusts up to 30 kt. Seas 4 to 6 ft. .SUN AND SUN NIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ256-280300- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island- 1001 AM EDT Wed Mar 27 2024 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH THURSDAY MORNING... .THIS AFTERNOON...N winds 5 to 10 kt, becoming NE. Seas 3 to 5 ft. Patchy fog. Vsby 1 NM or less. .TONIGHT...N winds around 5 kt. Seas 3 to 5 ft. Patchy fog. Rain likely after midnight. Vsby 1 NM or less. .THU...N winds 5 to 10 kt. Seas 3 to 4 ft. Patchy fog. Rain. Vsby 1 NM or less. .THU NIGHT...N winds 10 to 15 kt, increasing to 20 to 25 kt with gusts up to 30 kt after midnight. Seas 4 to 6 ft. Patchy fog. Rain. Vsby 1 NM or less, increasing to 1 to 3 NM after midnight. .FRI...NW winds 20 to 25 kt with gusts up to 30 kt. Seas 4 to 6 ft. Rain likely, mainly in the morning. Patchy fog in the morning with vsby 1 to 3 NM. .FRI NIGHT...NW winds 25 to 30 kt with gusts up to 40 kt. Seas 5 to 7 ft. .SAT...W winds 25 to 30 kt with gusts up to 40 kt. Seas 5 to 7 ft. .SAT NIGHT...W winds 15 to 20 kt with gusts up to 30 kt. Seas 4 to 6 ft. .SUN AND SUN NIGHT...NW winds 10 to 15 kt with gusts up to 25 kt. Seas 3 to 4 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. $$ ANZ232-280300- Nantucket Sound- 1001 AM EDT Wed Mar 27 2024 .THIS AFTERNOON...N winds around 5 kt. Seas 2 to 4 ft. Patchy fog. Vsby 1 NM or less. .TONIGHT...NE winds around 5 kt. Seas 2 to 4 ft. Patchy fog. Rain likely after midnight. Vsby 1 to 3 NM, decreasing to 1 NM or less after midnight. .THU...N winds 5 to 10 kt. Seas 2 to 3 ft. Patchy fog. Rain. Vsby 1 NM or less. .THU NIGHT...N winds 5 to 10 kt, increasing to 15 to 20 kt with gusts up to 25 kt after midnight. Seas 2 to 4 ft. Patchy fog. Rain. Vsby 1 NM or less, increasing to 1 to 3 NM after midnight. .FRI...NW winds 20 to 25 kt with gusts up to 30 kt. Seas 3 to 4 ft. Rain, mainly in the morning. Patchy fog in the morning with vsby 1 to 3 NM. .FRI NIGHT...NW winds 20 to 25 kt with gusts up to 30 kt, increasing to 25 to 30 kt with gusts up to 40 kt after midnight. Seas 3 to 5 ft. A chance of rain in the evening. .SAT...W winds 25 to 30 kt with gusts up to 35 kt. Seas 3 to 5 ft. .SAT NIGHT THROUGH SUN NIGHT...NW winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ233-280300- Vineyard Sound- 1001 AM EDT Wed Mar 27 2024 .THIS AFTERNOON...N winds around 5 kt. Seas around 2 ft. Patchy fog. Vsby 1 NM or less, increasing to 1 to 3 NM. .TONIGHT...N winds around 5 kt. Seas around 2 ft. Patchy fog. Rain likely after midnight. Vsby 1 to 3 NM, decreasing to 1 NM or less after midnight. .THU...N winds around 5 kt. Seas around 2 ft. Patchy fog. Rain. Vsby 1 NM or less. .THU NIGHT...N winds 5 to 10 kt, increasing to 15 to 20 kt with gusts up to 25 kt after midnight. Seas 2 to 3 ft. Patchy fog. Rain. Vsby 1 NM or less, increasing to 1 to 3 NM after midnight. .FRI...NW winds 20 to 25 kt with gusts up to 30 kt. Seas 2 to 3 ft. Rain likely, mainly in the morning. Patchy fog in the morning with vsby 1 to 3 NM. .FRI NIGHT...NW winds 25 to 30 kt with gusts up to 35 kt. Seas 2 to 4 ft. .SAT AND SAT NIGHT...W winds 25 to 30 kt with gusts up to 35 kt, diminishing to 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. .SUN AND SUN NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas 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. $$ ANZ234-280300- Buzzards Bay- 1001 AM EDT Wed Mar 27 2024 .THIS AFTERNOON...NE winds around 5 kt. Seas around 2 ft. Patchy fog. Vsby 1 NM or less. .TONIGHT...SE winds around 5 kt, becoming N after midnight. Seas around 2 ft. Patchy fog. A chance of rain after midnight. Vsby 1 to 3 NM, decreasing to 1 NM or less after midnight. .THU...N winds around 5 kt. Seas 1 foot or less. Patchy fog. Rain. Vsby 1 NM or less. .THU NIGHT...N winds 5 to 10 kt, increasing to 15 to 20 kt with gusts up to 25 kt after midnight. Seas 2 to 3 ft. Patchy fog. Rain. Vsby 1 NM or less, increasing to 1 to 3 NM after midnight. .FRI...N winds 20 to 25 kt, becoming NW 15 to 20 kt in the afternoon. Gusts up to 30 kt. Seas 2 to 3 ft. Rain likely, mainly in the morning. Patchy fog in the morning with vsby 1 to 3 NM. .FRI NIGHT...NW winds 20 to 25 kt with gusts up to 35 kt. Seas 2 to 3 ft. .SAT THROUGH SUN NIGHT...NW winds 20 to 25 kt with gusts up to 35 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ235-280300- Rhode Island Sound- 1001 AM EDT Wed Mar 27 2024 .THIS AFTERNOON...N winds 5 to 10 kt, becoming NE. Seas 2 to 3 ft. Patchy fog. Vsby 1 NM or less, increasing to 1 to 3 NM. .TONIGHT...W winds around 5 kt, becoming N after midnight. Seas 2 to 3 ft. Patchy fog. A chance of rain in the evening, then rain likely after midnight. Vsby 1 to 3 NM, decreasing to 1 NM or less after midnight. .THU...N winds around 5 kt. Seas 2 to 3 ft. Patchy fog. Rain. Vsby 1 NM or less. .THU NIGHT...N winds 10 to 15 kt, increasing to 15 to 20 kt with gusts up to 25 kt after midnight. Seas 2 to 4 ft. Patchy fog. Rain. Vsby 1 NM or less, increasing to 1 to 3 NM after midnight. .FRI...NW winds 20 to 25 kt with gusts up to 30 kt. Seas 3 to 4 ft. Rain likely, mainly in the morning. Patchy fog in the morning with vsby 1 to 3 NM. .FRI NIGHT...NW winds 25 to 30 kt with gusts up to 35 kt. Seas 3 to 5 ft. .SAT...W winds 25 to 30 kt with gusts up to 35 kt. Seas 3 to 5 ft. .SAT NIGHT THROUGH SUN NIGHT...NW winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 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. $$ ANZ237-280300- Block Island Sound- 1001 AM EDT Wed Mar 27 2024 .THIS AFTERNOON...N winds around 5 kt. Seas 2 to 3 ft. Patchy fog. Vsby 1 to 3 NM. .TONIGHT...W winds around 5 kt, becoming NW after midnight. Seas 2 to 3 ft. Patchy fog. A chance of rain in the evening, then rain likely after midnight. Vsby 1 to 3 NM, decreasing to 1 NM or less after midnight. .THU...NW winds around 5 kt. Seas 2 to 3 ft. Patchy fog. Rain. Vsby 1 NM or less. .THU NIGHT...N winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt after midnight. Seas 2 to 4 ft. Patchy fog. Rain. Vsby 1 NM or less, increasing to 1 to 3 NM after midnight. .FRI...NW winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 4 ft. Rain likely, mainly in the morning. .FRI NIGHT...NW winds 15 to 20 kt, increasing to 20 to 25 kt after midnight. Gusts up to 35 kt. Seas 3 to 4 ft. .SAT AND SAT NIGHT...W winds 20 to 25 kt with gusts up to 35 kt, diminishing to 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. .SUN AND SUN NIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ230-280300- Boston Harbor- 1001 AM EDT Wed Mar 27 2024 .THIS AFTERNOON...N winds around 5 kt, becoming NE. Waves 1 foot or less. Patchy fog. Vsby 1 NM or less, increasing to 1 to 3 NM. .TONIGHT...E winds around 5 kt. Waves 1 foot or less. A chance of rain in the evening, then rain after midnight. Patchy fog after midnight with vsby 1 to 3 NM. .THU...N winds around 5 kt. Waves 1 foot or less. Patchy fog. Rain. Vsby 1 NM or less. .THU NIGHT...N winds 5 to 10 kt, becoming NW 15 to 20 kt with gusts up to 25 kt after midnight. Waves around 2 ft. Patchy fog. Rain. Vsby 1 NM or less, increasing to 1 to 3 NM after midnight. .FRI...NW winds 20 to 25 kt. Waves around 2 ft. Rain likely, mainly in the morning. .FRI NIGHT...NW winds 25 to 30 kt with gusts up to 40 kt. Waves around 2 ft. .SAT THROUGH SUN NIGHT...NW winds 25 to 30 kt with gusts up to 40 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. $$ ANZ236-280300- Narragansett Bay- 1001 AM EDT Wed Mar 27 2024 .THIS AFTERNOON...NE winds around 5 kt. Waves around 2 ft. Patchy fog. Vsby 1 to 3 NM. .TONIGHT...SW winds around 5 kt. Waves around 2 ft. Patchy fog. A chance of rain in the evening, then rain likely after midnight with vsby 1 NM or less. .THU...N winds around 5 kt. Waves around 2 ft. Patchy fog. Rain. Vsby 1 NM or less. .THU NIGHT...N winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt after midnight. Waves 2 to 3 ft. Patchy fog. Rain. Vsby 1 NM or less, increasing to 1 to 3 NM after midnight. .FRI...NW winds 15 to 20 kt with gusts up to 25 kt. Waves 2 to 3 ft. Rain likely, mainly in the morning. .FRI NIGHT...NW winds 15 to 20 kt, increasing to 20 to 25 kt after midnight. Gusts up to 30 kt. Waves around 3 ft. .SAT THROUGH SUN NIGHT...NW winds 15 to 20 kt with gusts up to 30 kt. Waves 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ For the latest updates...please visit our webpage at www.weather.gov/boston You can follow us on Facebook at www.facebook.com/NWSBoston You can follow us on Twitter at @NWSBoston

USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.