Coastal Waters Forecast
Issued by NWS Boston, MA

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000 FZUS51 KBOX 262302 CWFBOX Coastal Waters Forecast for Massachusetts and Rhode Island National Weather Service Boston/Norton MA 701 PM EDT Tue Mar 26 2024 Coastal waters from the Merrimack River MA to Watch Hill RI out to 25 NM ANZ200-271200- 701 PM EDT Tue Mar 26 2024 .Synopsis for Massachusetts and Rhode Island coastal waters... Low pressure well south of New England and strong high pressure over southeast Quebec, will continue to generate NE gales over the MA/RI waters, along with very large/dangerous seas across the ocean waters. Both of these features weaken on Wednesday, resulting in light winds and 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. $$ ANZ250-271200- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 701 PM EDT Tue Mar 26 2024 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH THURSDAY MORNING... .TONIGHT...NE winds 15 to 20 kt with gusts up to 25 kt, diminishing to 10 to 15 kt after midnight. Seas 9 to 12 ft, subsiding to 7 to 10 ft after midnight. Patchy fog. A chance of rain this evening. A slight chance of rain after midnight. Vsby 1 to 3 NM. .WED...N winds 5 to 10 kt. Seas 5 to 8 ft. Patchy fog. Vsby 1 to 3 NM. .WED NIGHT...S winds around 5 kt. Seas 4 to 6 ft. A chance of rain. Patchy fog after midnight with vsby 1 to 3 NM. .THU...N winds 5 to 10 kt. Seas 4 to 6 ft. Rain. Patchy fog in the morning. Vsby 1 to 3 NM. .THU NIGHT AND FRI...NW winds 20 to 25 kt with gusts up to 30 kt. Seas 5 to 7 ft. Rain. Vsby 1 to 3 NM. .FRI NIGHT...NW winds 20 to 25 kt with gusts up to 35 kt. Seas 5 to 7 ft. A chance of rain in the evening. .SAT...W winds 20 to 25 kt with gusts up to 35 kt. Seas 5 to 7 ft. .SAT NIGHT THROUGH SUN NIGHT...NW winds 10 to 15 kt with gusts up to 25 kt. Seas 3 to 5 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ251-271200- Massachusetts Bay and Ipswich Bay- 701 PM EDT Tue Mar 26 2024 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH THURSDAY MORNING... .TONIGHT...NE winds 15 to 20 kt with gusts up to 25 kt, diminishing to 10 to 15 kt after midnight. Seas 7 to 10 ft, subsiding to 6 to 8 ft after midnight. Patchy fog. A chance of rain. Vsby 1 to 3 NM. .WED...N winds 5 to 10 kt. Seas 5 to 7 ft. Patchy fog. Vsby 1 to 3 NM. .WED NIGHT...S winds around 5 kt. Seas 3 to 5 ft. A chance of rain. Patchy fog after midnight with vsby 1 to 3 NM. .THU...N winds 5 to 10 kt. Seas 3 to 4 ft. Rain. Patchy fog in the morning. Vsby 1 to 3 NM. .THU NIGHT AND FRI...NW winds 20 to 25 kt with gusts up to 30 kt. Seas 3 to 5 ft. Rain. Vsby 1 to 3 NM. .FRI NIGHT...NW winds 20 to 25 kt with gusts up to 30 kt. Seas 4 to 5 ft. A chance of rain in the evening. .SAT...W winds 15 to 20 kt with gusts up to 30 kt. Seas 3 to 5 ft. .SAT NIGHT THROUGH SUN NIGHT...NW winds 10 to 15 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. $$ ANZ231-271200- Cape Cod Bay- 701 PM EDT Tue Mar 26 2024 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL MIDNIGHT EDT TONIGHT... .TONIGHT...NE winds 15 to 20 kt with gusts up to 25 kt, becoming N 5 to 10 kt after midnight. Seas 5 to 7 ft. Patchy fog. A chance of rain this evening. A slight chance of rain after midnight. Vsby 1 to 3 NM. .WED...N winds 5 to 10 kt. Seas 3 to 5 ft. Patchy fog. Vsby 1 to 3 NM. .WED NIGHT...SW winds around 5 kt, becoming S after midnight. Seas 2 to 3 ft. A chance of rain. Patchy fog after midnight with vsby 1 to 3 NM. .THU...N winds 5 to 10 kt. Seas 2 to 3 ft. Rain. Patchy fog in the morning. Vsby 1 to 3 NM. .THU NIGHT AND FRI...NW winds 20 to 25 kt with gusts up to 30 kt. Seas 3 to 5 ft. Rain. Vsby 1 to 3 NM. .FRI NIGHT...NW winds 20 to 25 kt with gusts up to 35 kt. Seas 3 to 5 ft. A chance of rain in the evening. .SAT...W winds 15 to 20 kt with gusts up to 35 kt. Seas 3 to 5 ft. .SAT NIGHT THROUGH SUN NIGHT...NW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ254-271200- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm- 701 PM EDT Tue Mar 26 2024 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH THURSDAY MORNING... .TONIGHT...NE winds 15 to 20 kt, diminishing to 5 to 10 kt after midnight. Seas 8 to 11 ft, subsiding to 6 to 9 ft after midnight. Patchy fog. A slight chance of rain. Vsby 1 to 3 NM. .WED...NE winds around 5 kt. Seas 5 to 8 ft. Patchy fog. Vsby 1 to 3 NM. .WED NIGHT...SE winds around 5 kt. Seas 5 to 6 ft. Patchy fog after midnight. A chance of rain after midnight with vsby 1 to 3 NM. .THU...NE winds 5 to 10 kt. Seas 4 to 6 ft. Rain. Patchy fog in the morning. Vsby 1 to 3 NM. .THU NIGHT AND FRI...NW winds 20 to 25 kt with gusts up to 30 kt. Seas 5 to 7 ft. Rain. Vsby 1 to 3 NM. .FRI NIGHT...NW winds 20 to 25 kt with gusts up to 35 kt. Seas 6 to 8 ft. A chance of rain in the evening. .SAT...W winds 20 to 25 kt with gusts up to 35 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 around 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. $$ ANZ255-271200- Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket- 701 PM EDT Tue Mar 26 2024 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH THURSDAY MORNING... .TONIGHT...NE winds 15 to 20 kt with gusts up to 25 kt, diminishing to 5 to 10 kt after midnight. Seas 6 to 9 ft, subsiding to 5 to 7 ft after midnight. Patchy fog. A slight chance of rain. Vsby 1 to 3 NM. .WED...NE winds 5 to 10 kt. Seas 5 to 7 ft. Patchy fog. Vsby 1 to 3 NM. .WED NIGHT...E winds around 5 kt. Seas 4 to 6 ft. Patchy fog after midnight. A chance of rain after midnight with vsby 1 to 3 NM. .THU...NE winds 5 to 10 kt. Seas 3 to 5 ft. Rain. Patchy fog in the morning. Vsby 1 to 3 NM. .THU NIGHT AND FRI...NW winds 25 to 30 kt. Seas 5 to 7 ft. Rain. Vsby 1 to 3 NM. .FRI NIGHT...NW winds 20 to 25 kt with gusts up to 35 kt. Seas 5 to 7 ft. .SAT...W winds 20 to 25 kt with gusts up to 35 kt. Seas 5 to 7 ft. .SAT NIGHT...W winds 15 to 20 kt with gusts up to 30 kt. Seas 4 to 6 ft. .SUN AND SUN NIGHT...NW winds around 15 kt with gusts up to 25 kt. Seas 3 to 5 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ256-271200- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island- 701 PM EDT Tue Mar 26 2024 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH THURSDAY MORNING... .TONIGHT...NE winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 5 to 8 ft. Patchy fog. A slight chance of rain. Vsby 1 to 3 NM. .WED...NE winds 5 to 10 kt. Seas 4 to 6 ft. Patchy fog in the morning with vsby 1 to 3 NM. .WED NIGHT...SE winds around 5 kt, becoming NE around 5 kt after midnight. Seas 4 to 5 ft. Patchy fog after midnight. A chance of rain after midnight. .THU...N winds 5 to 10 kt. Seas 4 to 5 ft. Rain. Patchy fog in the morning. Vsby 1 to 3 NM. .THU NIGHT AND FRI...NW winds 20 to 25 kt with gusts up to 30 kt. Seas 4 to 6 ft. Rain. Vsby 1 to 3 NM. .FRI NIGHT...NW winds 20 to 25 kt with gusts up to 30 kt. Seas 5 to 6 ft. .SAT...W winds 20 to 25 kt with gusts up to 30 kt. Seas 4 to 6 ft. .SAT NIGHT THROUGH SUN NIGHT...NW winds 15 to 20 kt with gusts up to 30 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. $$ ANZ232-271200- Nantucket Sound- 701 PM EDT Tue Mar 26 2024 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL MIDNIGHT EDT TONIGHT... .TONIGHT...N winds 15 to 20 kt with gusts up to 25 kt, becoming NE 5 to 10 kt after midnight. Seas 4 to 6 ft. Patchy fog. A chance of rain this evening. A slight chance of rain after midnight. Vsby 1 to 3 NM. .WED...NE winds around 5 kt. Seas 2 to 4 ft. Patchy fog. Vsby 1 to 3 NM. .WED NIGHT...E winds around 5 kt. Seas 2 to 3 ft. Patchy fog after midnight. A chance of rain after midnight with vsby 1 to 3 NM. .THU...NE winds 5 to 10 kt. Seas 2 to 3 ft. Rain. Patchy fog in the morning. Vsby 1 to 3 NM. .THU NIGHT AND FRI...NW winds 20 to 25 kt with gusts up to 30 kt. Seas 2 to 4 ft. Rain. Vsby 1 to 3 NM. .FRI NIGHT...NW winds around 20 kt with gusts up to 30 kt. Seas 3 to 4 ft. A chance of rain in the evening. .SAT AND SAT NIGHT...W winds 15 to 20 kt, diminishing to 10 to 15 kt. Gusts up to 30 kt. Seas 2 to 4 ft. .SUN AND SUN NIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ233-271200- Vineyard Sound- 701 PM EDT Tue Mar 26 2024 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL MIDNIGHT EDT TONIGHT... .TONIGHT...N winds 15 to 20 kt with gusts up to 25 kt, becoming NE 5 to 10 kt after midnight. Seas 2 to 4 ft. Patchy fog. A slight chance of rain. Vsby 1 to 3 NM. .WED...NE winds around 5 kt. Seas around 2 ft. Patchy fog. Vsby 1 to 3 NM. .WED NIGHT...S winds around 5 kt, becoming NW after midnight. Seas around 2 ft. Patchy fog after midnight. A chance of rain after midnight with vsby 1 to 3 NM. .THU...N winds 5 to 10 kt. Seas around 2 ft. Rain. Patchy fog in the morning. Vsby 1 to 3 NM. .THU NIGHT AND FRI...NW winds 20 to 25 kt. Seas 2 to 3 ft. Rain. Vsby 1 to 3 NM. .FRI NIGHT...NW winds 20 to 25 kt with gusts up to 30 kt. Seas 3 to 4 ft. .SAT AND SAT NIGHT...W winds 15 to 20 kt, diminishing to 10 to 15 kt. Gusts up to 30 kt. Seas 2 to 4 ft. .SUN AND 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. $$ ANZ234-271200- Buzzards Bay- 701 PM EDT Tue Mar 26 2024 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL MIDNIGHT EDT TONIGHT... .TONIGHT...NE winds 10 to 15 kt with gusts up to 25 kt, diminishing to 5 to 10 kt after midnight. Seas 3 to 5 ft, subsiding to 2 to 3 ft after midnight. Patchy fog. A slight chance of rain. Vsby 1 to 3 NM. .WED...NE winds around 5 kt. Seas around 2 ft. Patchy fog. Vsby 1 to 3 NM. .WED NIGHT...Light and variable winds, becoming W around 5 kt after midnight. Seas around 2 ft. Patchy fog after midnight. A chance of rain after midnight with vsby 1 to 3 NM. .THU...N winds 5 to 10 kt. Seas around 2 ft. Rain. Patchy fog in the morning. Vsby 1 to 3 NM. .THU NIGHT AND FRI...NW winds 20 to 25 kt. Seas 2 to 3 ft. Rain. Vsby 1 to 3 NM. .FRI NIGHT...NW winds around 20 kt with gusts up to 30 kt. Seas around 3 ft. .SAT THROUGH SUN NIGHT...NW winds 15 to 20 kt with gusts up to 30 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ235-271200- Rhode Island Sound- 701 PM EDT Tue Mar 26 2024 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL MIDNIGHT EDT TONIGHT... .TONIGHT...NE winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 4 to 6 ft, subsiding to 3 to 4 ft after midnight. Patchy fog. A slight chance of rain. Vsby 1 to 3 NM. .WED...N winds 5 to 10 kt, becoming E in the afternoon. Seas 3 to 4 ft. Patchy fog in the morning with vsby 1 to 3 NM. .WED NIGHT...S winds around 5 kt, becoming NW after midnight. Seas around 3 ft. Patchy fog after midnight. A chance of rain after midnight. .THU...N winds 5 to 10 kt. Seas 2 to 3 ft. Rain. Patchy fog in the morning. Vsby 1 to 3 NM. .THU NIGHT AND FRI...NW winds 20 to 25 kt. Seas 3 to 4 ft. Rain. Vsby 1 to 3 NM. .FRI NIGHT...NW winds 20 to 25 kt with gusts up to 30 kt. Seas 4 to 5 ft. .SAT...W winds 15 to 20 kt with gusts up to 30 kt. Seas 3 to 5 ft. .SAT NIGHT THROUGH 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. $$ ANZ237-271200- Block Island Sound- 701 PM EDT Tue Mar 26 2024 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL MIDNIGHT EDT TONIGHT... .TONIGHT...NE winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 4 to 6 ft, subsiding to 3 to 4 ft after midnight. Patchy fog. A chance of rain after midnight. Vsby 1 to 3 NM. .WED...N winds 5 to 10 kt, becoming E in the afternoon. Seas 3 to 4 ft. Patchy fog in the morning with vsby 1 to 3 NM. .WED NIGHT...SW winds around 5 kt, becoming N after midnight. Seas 2 to 3 ft. Patchy fog. A chance of rain in the evening. Rain likely after midnight. Vsby 1 to 3 NM. .THU...N winds 5 to 10 kt. Seas 2 to 3 ft. Rain. Patchy fog in the morning. Vsby 1 to 3 NM. .THU NIGHT...N winds 10 to 15 kt. Gusts up to 20 kt after midnight. Seas 3 to 4 ft. Rain. Vsby 1 to 3 NM. .FRI...NW winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. A chance of rain in the morning. .FRI NIGHT...NW winds around 20 kt with gusts up to 30 kt. Seas 3 to 5 ft. .SAT THROUGH SUN NIGHT...NW winds 15 to 20 kt with gusts up to 30 kt. Seas 2 to 4 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ230-271200- Boston Harbor- 701 PM EDT Tue Mar 26 2024 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH WEDNESDAY MORNING... .TONIGHT...NE winds 10 to 15 kt with gusts up to 25 kt, becoming N 5 to 10 kt after midnight. Waves 2 to 3 ft. At the outer harbor entrance, waves 5 to 7 ft, subsiding to 3 to 5 ft after midnight. Patchy fog. A chance of rain. Vsby 1 to 3 NM. .WED...N winds 5 to 10 kt, becoming E in the afternoon. Waves 1 foot or less, except 3 to 5 ft at the outer harbor entrance. Patchy fog. Vsby 1 to 3 NM. .WED NIGHT...S winds around 5 kt. Waves 1 foot or less, except 2 to 4 ft at the outer harbor entrance. A chance of rain in the evening, then rain likely after midnight. Patchy fog after midnight with vsby 1 to 3 NM. .THU...N winds 5 to 10 kt. Waves around 2 ft in the morning, then 1 foot or less. Rain. Patchy fog in the morning. Vsby 1 to 3 NM. .THU NIGHT AND FRI...NW winds 20 to 25 kt with gusts up to 30 kt. Waves around 2 ft. Rain. Vsby 1 to 3 NM. .FRI NIGHT...NW winds 20 to 25 kt with gusts up to 30 kt. Waves around 2 ft. .SAT THROUGH SUN NIGHT...NW winds 15 to 20 kt with gusts up to 30 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. $$ ANZ236-271200- Narragansett Bay- 701 PM EDT Tue Mar 26 2024 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING... .TONIGHT...N winds 10 to 15 kt with gusts up to 25 kt, diminishing to 5 to 10 kt after midnight. Waves 2 to 3 ft. Patchy fog. A slight chance of rain this evening. A chance of rain after midnight. Vsby 1 to 3 NM. .WED...N winds 5 to 10 kt, becoming E in the afternoon. Waves 2 to 3 ft. Patchy fog in the morning with vsby 1 to 3 NM. .WED NIGHT...S winds around 5 kt. Waves 2 to 3 ft. Patchy fog after midnight. A chance of rain after midnight. .THU...N winds around 5 kt, increasing to 5 to 10 kt in the afternoon. Waves 2 to 3 ft. Rain. Patchy fog in the morning. Vsby 1 to 3 NM. .THU NIGHT...N winds 10 to 15 kt, increasing to 15 to 20 kt after midnight. Gusts up to 25 kt. Waves 2 to 3 ft. Rain. Vsby 1 to 3 NM. .FRI...NW winds 15 to 20 kt with gusts up to 25 kt. Waves 2 to 3 ft. A chance of rain. .FRI NIGHT...NW winds 15 to 20 kt with gusts up to 25 kt. Waves around 3 ft. .SAT THROUGH SUN NIGHT...NW winds 15 to 20 kt with gusts up to 25 kt. Waves 2 to 4 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ 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

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