Coastal Waters Forecast
Issued by NWS Boston, MA
Issued by NWS Boston, MA
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298 FZUS51 KBOX 230504 CWFBOX Coastal Waters Forecast for Massachusetts and Rhode Island National Weather Service Boston/Norton MA 103 AM EDT Mon Sep 23 2024 Coastal waters from the Merrimack River MA to Watch Hill RI out to 25 NM ANZ200-231800- 103 AM EDT Mon Sep 23 2024 .Synopsis for Massachusetts and Rhode Island coastal waters... High pres will begin to build over the waters through Mon. A cold front is expected to approach the region Wed into Thurs, bringing the next chance for unsettled weather. $$ ANZ250-231800- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 103 AM EDT Mon Sep 23 2024 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH TUESDAY MORNING... .REST OF TONIGHT...NE winds around 15 kt with gusts up to 25 kt. Seas 7 to 9 ft. Wave Detail: E 8 ft at 10 seconds and NE 1 foot at 3 seconds. .MON...NE winds 15 to 20 kt. Seas 7 to 9 ft. Wave Detail: E 8 ft at 10 seconds and NE 1 foot at 4 seconds. .MON NIGHT...NE winds around 15 kt with gusts up to 20 kt. Seas 6 to 8 ft. Wave Detail: E 8 ft at 10 seconds and NE 1 foot at 3 seconds. .TUE...NE winds around 15 kt with gusts up to 20 kt. Seas 6 to 7 ft. Wave Detail: E 6 ft at 10 seconds and NE 1 foot at 2 seconds. .TUE NIGHT AND WED...E winds 10 to 15 kt with gusts up to 20 kt. Seas 5 to 7 ft. Wave Detail: E 6 ft at 10 seconds. .WED NIGHT...SE winds around 10 kt. Seas 5 to 6 ft. Wave Detail: E 6 ft at 13 seconds. A chance of showers after midnight. .THU THROUGH FRI...N winds around 10 kt. Seas 4 to 6 ft. A chance of showers. .FRI NIGHT...N winds 10 to 15 kt with gusts up to 20 kt. Seas 5 to 6 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ251-231800- Massachusetts Bay and Ipswich Bay- 103 AM EDT Mon Sep 23 2024 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH TUESDAY MORNING... .REST OF TONIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 6 to 8 ft. Wave Detail: E 7 ft at 10 seconds and NE 1 foot at 4 seconds. .MON...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 6 to 8 ft. Wave Detail: E 8 ft at 10 seconds and NE 1 foot at 4 seconds. .MON NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 5 to 7 ft. Wave Detail: E 7 ft at 10 seconds and NE 1 foot at 3 seconds. .TUE...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 5 to 6 ft. Wave Detail: E 6 ft at 10 seconds and NE 1 foot at 3 seconds. .TUE NIGHT AND WED...E winds 10 to 15 kt. Seas 4 to 6 ft. Wave Detail: E 6 ft at 10 seconds and NE 1 foot at 3 seconds. .WED NIGHT...SE winds 5 to 10 kt. Seas 4 to 5 ft. Wave Detail: E 5 ft at 13 seconds. A chance of showers. .THU AND THU NIGHT...SE winds 5 to 10 kt, becoming SW. Seas 4 to 5 ft. A chance of showers. .FRI AND FRI NIGHT...N winds 10 to 15 kt. Seas 4 to 6 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. $$ ANZ231-231800- Cape Cod Bay- 103 AM EDT Mon Sep 23 2024 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING... .REST OF TONIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. Wave Detail: E 5 ft at 10 seconds and N 3 ft at 4 seconds. .MON...NE winds around 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. Wave Detail: E 5 ft at 11 seconds and N 3 ft at 4 seconds. .MON NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. Wave Detail: E 5 ft at 11 seconds and NE 2 ft at 4 seconds. .TUE...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. Wave Detail: E 4 ft at 10 seconds and NE 2 ft at 4 seconds. .TUE NIGHT AND WED...E winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. Wave Detail: E 4 ft at 10 seconds and E 2 ft at 3 seconds. .WED NIGHT...SE winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: E 4 ft at 11 seconds and E 1 foot at 2 seconds. A chance of showers after midnight. .THU THROUGH FRI...N winds 5 to 10 kt. Seas 2 to 4 ft. A chance of showers. .FRI NIGHT...N winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ254-231800- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm- 103 AM EDT Mon Sep 23 2024 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH TUESDAY MORNING... .REST OF TONIGHT...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 8 to 11 ft. Wave Detail: E 10 ft at 11 seconds and NE 1 foot at 4 seconds. .MON...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 8 to 11 ft. Wave Detail: E 10 ft at 11 seconds and NE 1 foot at 4 seconds. .MON NIGHT...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 7 to 10 ft. Wave Detail: E 9 ft at 11 seconds and NE 1 foot at 3 seconds. .TUE...NE winds 15 to 20 kt. Seas 6 to 8 ft. Wave Detail: E 8 ft at 10 seconds and NE 1 foot at 3 seconds. .TUE NIGHT AND WED...E winds 10 to 15 kt with gusts up to 20 kt. Seas 6 to 8 ft. Wave Detail: E 7 ft at 10 seconds and NE 1 foot at 3 seconds. .WED NIGHT...E winds 5 to 10 kt. Seas 5 to 7 ft. Wave Detail: E 7 ft at 13 seconds. A chance of showers after midnight. .THU THROUGH FRI...NW winds 10 to 15 kt. Seas 4 to 6 ft. A chance of showers. .FRI NIGHT...N winds 10 to 15 kt with gusts up to 20 kt. Seas 5 to 7 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. $$ ANZ255-231800- Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket- 103 AM EDT Mon Sep 23 2024 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH TUESDAY MORNING... .REST OF TONIGHT...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 7 to 10 ft. Wave Detail: E 9 ft at 11 seconds and NE 3 ft at 5 seconds. .MON...NE winds around 20 kt with gusts up to 25 kt. Seas 7 to 10 ft. Wave Detail: E 9 ft at 11 seconds and NE 3 ft at 5 seconds. .MON NIGHT...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 6 to 9 ft. Wave Detail: E 8 ft at 11 seconds and NE 2 ft at 4 seconds. .TUE...NE winds 15 to 20 kt. Seas 5 to 8 ft. Wave Detail: E 7 ft at 10 seconds and NE 2 ft at 4 seconds. .TUE NIGHT...NE winds 15 to 20 kt, becoming E 10 to 15 kt after midnight. Seas 5 to 7 ft. Wave Detail: E 6 ft at 10 seconds and NE 2 ft at 4 seconds. .WED...E winds 10 to 15 kt. Seas 4 to 6 ft. Wave Detail: E 6 ft at 10 seconds and NE 1 foot at 3 seconds. .WED NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. A chance of showers after midnight. .THU...SE winds around 10 kt. Seas 4 to 6 ft. A chance of showers. .THU NIGHT...SW winds around 10 kt. Seas 3 to 5 ft. A chance of showers. .FRI...NW winds 10 to 15 kt. Seas 3 to 5 ft. .FRI NIGHT...N winds 10 to 15 kt. Seas 4 to 6 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ256-231800- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island- 103 AM EDT Mon Sep 23 2024 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH TUESDAY MORNING... .REST OF TONIGHT...NE winds around 15 kt with gusts up to 25 kt. Seas 6 to 8 ft. Wave Detail: E 7 ft at 10 seconds and NE 3 ft at 5 seconds. .MON...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 6 to 8 ft. Wave Detail: E 8 ft at 11 seconds and NE 2 ft at 5 seconds. .MON NIGHT...NE winds 15 to 20 kt. Seas 5 to 8 ft. Wave Detail: E 7 ft at 11 seconds and NE 2 ft at 4 seconds. .TUE...NE winds 15 to 20 kt. Seas 5 to 7 ft. Wave Detail: E 7 ft at 11 seconds and NE 1 foot at 3 seconds. .TUE NIGHT AND WED...E winds 15 to 20 kt. Seas 4 to 6 ft. Wave Detail: E 6 ft at 10 seconds and NE 1 foot at 4 seconds. .WED NIGHT...E winds 10 to 15 kt. Seas 4 to 5 ft. Wave Detail: E 5 ft at 10 seconds. A chance of showers after midnight. .THU AND THU NIGHT...SE winds around 10 kt, becoming W. Seas 3 to 5 ft. A chance of showers. .FRI AND FRI NIGHT...N winds 10 to 15 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. $$ ANZ232-231800- Nantucket Sound- 103 AM EDT Mon Sep 23 2024 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING... .REST OF TONIGHT...NE winds around 15 kt with gusts up to 25 kt. Seas 4 to 6 ft. Wave Detail: NE 4 ft at 4 seconds and E 4 ft at 10 seconds. .MON...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 6 ft. Wave Detail: E 4 ft at 11 seconds and NE 3 ft at 4 seconds. .MON NIGHT...NE winds around 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. Wave Detail: E 5 ft at 11 seconds and NE 3 ft at 4 seconds. .TUE...NE winds around 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. Wave Detail: NE 3 ft at 4 seconds and E 3 ft at 10 seconds. .TUE NIGHT AND WED...E winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. Wave Detail: E 3 ft at 4 seconds and E 3 ft at 10 seconds. .WED NIGHT...E winds 10 to 15 kt. Seas 2 to 4 ft. Wave Detail: E 3 ft at 11 seconds and E 2 ft at 3 seconds. A chance of showers after midnight. .THU AND THU NIGHT...SE winds around 10 kt, becoming SW. Seas 2 to 4 ft. A chance of showers. .FRI AND FRI NIGHT...N winds 10 to 15 kt. Seas 2 to 4 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ233-231800- Vineyard Sound- 103 AM EDT Mon Sep 23 2024 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING... .REST OF TONIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. Wave Detail: NE 2 ft at 4 seconds and E 2 ft at 10 seconds. .MON...NE winds around 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. Wave Detail: E 3 ft at 11 seconds and NE 2 ft at 4 seconds. .MON NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at 11 seconds and NE 2 ft at 4 seconds. .TUE...NE winds around 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: NE 2 ft at 3 seconds and E 2 ft at 10 seconds. .TUE NIGHT AND WED...E winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: NE 2 ft at 3 seconds and E 2 ft at 10 seconds. .WED NIGHT...E winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E 2 ft at 10 seconds and E 1 foot at 3 seconds. A chance of showers after midnight. .THU AND THU NIGHT...SE winds 5 to 10 kt, becoming SW. Seas around 2 ft. A chance of showers. .FRI AND FRI NIGHT...N winds 10 to 15 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. $$ ANZ234-231800- Buzzards Bay- 103 AM EDT Mon Sep 23 2024 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING... .REST OF TONIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Wave Detail: E 3 ft at 10 seconds and NE 2 ft at 3 seconds. .MON...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Wave Detail: E 3 ft at 11 seconds and NE 2 ft at 3 seconds. .MON NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Wave Detail: E 3 ft at 11 seconds and NE 2 ft at 3 seconds. .TUE...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Wave Detail: E 3 ft at 11 seconds and NE 2 ft at 3 seconds. .TUE NIGHT AND WED...E winds 10 to 15 kt. Seas 2 to 4 ft. Wave Detail: NE 2 ft at 3 seconds and E 2 ft at 10 seconds. .WED NIGHT...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 2 ft at 10 seconds and E 1 foot at 2 seconds. A chance of showers after midnight. .THU AND THU NIGHT...SE winds 5 to 10 kt, becoming SW. Seas 2 to 3 ft. A chance of showers. .FRI AND FRI NIGHT...N winds around 10 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ235-231800- Rhode Island Sound- 103 AM EDT Mon Sep 23 2024 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING... .REST OF TONIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 5 ft. Wave Detail: NE 4 ft at 5 seconds and E 3 ft at 10 seconds. .MON...NE winds around 15 kt with gusts up to 20 kt. Seas 4 to 5 ft. Wave Detail: NE 4 ft at 5 seconds and E 4 ft at 12 seconds. .MON NIGHT...NE winds around 15 kt with gusts up to 20 kt. Seas 4 to 5 ft. Wave Detail: E 4 ft at 11 seconds and NE 3 ft at 4 seconds. .TUE...NE winds around 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. Wave Detail: E 4 ft at 11 seconds and NE 2 ft at 4 seconds. .TUE NIGHT AND WED...E winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. Wave Detail: SE 4 ft at 10 seconds and NE 2 ft at 5 seconds. .WED NIGHT...E winds around 10 kt. Seas 3 to 4 ft. Wave Detail: SE 3 ft at 10 seconds and E 1 foot at 3 seconds. A chance of showers. .THU AND THU NIGHT...SE winds around 10 kt, becoming W. Seas 2 to 3 ft. A chance of showers. .FRI AND FRI NIGHT...N winds 10 to 15 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. $$ ANZ237-231800- Block Island Sound- 103 AM EDT Mon Sep 23 2024 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING... .REST OF TONIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 5 ft. Wave Detail: E 4 ft at 10 seconds and NE 2 ft at 5 seconds. .MON...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 5 ft. Wave Detail: E 5 ft at 11 seconds and NE 3 ft at 5 seconds. .MON NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 5 ft. Wave Detail: E 5 ft at 11 seconds and NE 2 ft at 5 seconds. .TUE...NE winds around 15 kt with gusts up to 20 kt. Seas around 4 ft. Wave Detail: E 4 ft at 11 seconds and NE 1 foot at 4 seconds. .TUE NIGHT AND WED...E winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. Wave Detail: E 4 ft at 10 seconds and NE 2 ft at 5 seconds. .WED NIGHT...E winds around 10 kt. Seas 3 to 4 ft. Wave Detail: E 4 ft at 10 seconds and NE 1 foot at 3 seconds. A chance of showers. .THU...S winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers. .THU NIGHT THROUGH FRI NIGHT...N winds 5 to 10 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ230-231800- Boston Harbor- 103 AM EDT Mon Sep 23 2024 .REST OF TONIGHT...NE winds around 10 kt with gusts up to 20 kt. Waves 2 to 3 ft, except 4 to 6 ft at the outer harbor entrance. .MON...NE winds 10 to 15 kt. Gusts up to 20 kt in the morning. Waves 2 to 3 ft, except 4 to 6 ft at the outer harbor entrance. .MON NIGHT...NE winds 10 to 15 kt. Waves 2 to 3 ft in the evening, then 1 foot or less. At the outer harbor entrance, waves 3 to 5 ft. .TUE...NE winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Waves 2 to 3 ft. .TUE NIGHT AND WED...E winds 5 to 10 kt. Waves around 2 ft. .WED NIGHT...SE winds 5 to 10 kt. Waves 1 foot or less, except 2 to 4 ft at the outer harbor entrance. A chance of showers. .THU AND THU NIGHT...SE winds 5 to 10 kt, becoming SW. Waves 1 foot or less, except 2 to 4 ft at the outer harbor entrance. A chance of showers. .FRI AND FRI NIGHT...N winds 5 to 10 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. $$ ANZ236-231800- Narragansett Bay- 103 AM EDT Mon Sep 23 2024 .REST OF TONIGHT...NE winds around 10 kt with gusts up to 20 kt. Waves 2 to 3 ft. .MON...NE winds 10 to 15 kt. Gusts up to 20 kt in the morning. Waves 2 to 3 ft. .MON NIGHT...NE winds 10 to 15 kt. Waves 2 to 3 ft. .TUE...NE winds around 10 kt. Gusts up to 20 kt in the afternoon. Waves 2 to 3 ft. .TUE NIGHT AND WED...E winds 5 to 10 kt. Waves 2 to 3 ft. .WED NIGHT...E winds 5 to 10 kt. Waves 2 to 3 ft. A chance of showers. .THU AND THU NIGHT...SE winds 5 to 10 kt, becoming W. Waves 2 to 3 ft. A chance of showers. .FRI AND FRI NIGHT...N winds 5 to 10 kt. Waves 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ 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