Coastal Waters Forecast
Issued by NWS Boston, MA

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052 FZUS51 KBOX 221104 CWFBOX Coastal Waters Forecast for Massachusetts and Rhode Island National Weather Service Boston/Norton MA 703 AM EDT Sun Sep 22 2024 Coastal waters from the Merrimack River MA to Watch Hill RI out to 25 NM ANZ200-230000- 703 AM EDT Sun Sep 22 2024 .Synopsis for Massachusetts and Rhode Island coastal waters... Low pressure SE of New England will moves farther out to sea today through Mon as weak high pressure will build over the waters. A cold front will approach the region from the Great Lakes Wed. $$ ANZ250-230000- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 703 AM EDT Sun Sep 22 2024 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH MONDAY AFTERNOON... .TODAY...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 7 to 9 ft. Wave Detail: E 8 ft at 10 seconds and NE 1 foot at 4 seconds. .TONIGHT...NE winds around 15 kt with gusts up to 25 kt. Seas 7 to 9 ft. Wave Detail: E 8 ft at 10 seconds and NE 1 foot at 4 seconds. .MON...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 7 to 9 ft. Wave Detail: E 8 ft at 10 seconds and NE 1 foot at 4 seconds. .MON NIGHT...NE winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas 6 to 8 ft. Wave Detail: E 8 ft at 10 seconds and NE 1 foot at 3 seconds. .TUE AND TUE NIGHT...E winds 10 to 15 kt with gusts up to 20 kt. Seas 5 to 7 ft. Wave Detail: E 6 ft at 10 seconds. .WED...E winds around 10 kt. Seas 5 to 6 ft. Wave Detail: E 6 ft at 10 seconds. .WED NIGHT THROUGH THU NIGHT...SE winds around 10 kt. Seas 5 to 6 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ251-230000- Massachusetts Bay and Ipswich Bay- 703 AM EDT Sun Sep 22 2024 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH MONDAY AFTERNOON... .TODAY...NE winds around 15 kt with gusts up to 25 kt. Seas 5 to 8 ft. Wave Detail: E 7 ft at 9 seconds and NE 2 ft at 4 seconds. .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 2 ft at 4 seconds. .MON...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 NIGHT...NE winds 10 to 15 kt. Seas 5 to 7 ft. Wave Detail: E 7 ft at 10 seconds and NE 1 foot at 3 seconds. .TUE AND TUE NIGHT...E winds 10 to 15 kt. Seas 5 to 6 ft. Wave Detail: E 6 ft at 10 seconds and NE 1 foot at 3 seconds. .WED...E winds around 10 kt. Seas 4 to 5 ft. Wave Detail: E 5 ft at 10 seconds. .WED NIGHT THROUGH THU NIGHT...SE winds around 10 kt. Seas 4 to 5 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. $$ ANZ231-230000- Cape Cod Bay- 703 AM EDT Sun Sep 22 2024 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH MONDAY AFTERNOON... .TODAY...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 6 ft. Wave Detail: E 5 ft at 9 seconds and N 3 ft at 4 seconds. .TONIGHT...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 6 ft. Wave Detail: E 5 ft at 10 seconds and N 3 ft at 4 seconds. .MON...NE winds around 15 kt with gusts up to 20 kt. Seas 4 to 6 ft. Wave Detail: E 6 ft at 11 seconds and N 3 ft at 4 seconds. .MON NIGHT...NE winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas 4 to 5 ft. Wave Detail: E 5 ft at 11 seconds and N 2 ft at 3 seconds. .TUE AND TUE NIGHT...E winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. Wave Detail: E 4 ft at 10 seconds and NE 2 ft at 3 seconds. .WED...E winds around 10 kt. Seas 3 to 4 ft. Wave Detail: E 4 ft at 10 seconds and E 1 foot at 3 seconds. .WED NIGHT THROUGH THU NIGHT...SE winds around 10 kt. Seas 3 to 4 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ254-230000- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm- 703 AM EDT Sun Sep 22 2024 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH MONDAY AFTERNOON... .TODAY...NE winds 15 to 20 kt with gusts up to 30 kt. Seas 7 to 10 ft. Wave Detail: E 9 ft at 9 seconds and NE 1 foot at 4 seconds. Patchy fog. A chance of rain this morning. .TONIGHT...NE winds 15 to 20 kt with gusts up to 30 kt. Seas 8 to 11 ft. Wave Detail: E 10 ft at 11 seconds and NE 1 foot at 4 seconds. A chance of rain and drizzle in the evening. .MON...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 8 to 10 ft. Wave Detail: E 10 ft at 11 seconds and NE 1 foot at 4 seconds. .MON NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 7 to 10 ft. Wave Detail: E 9 ft at 11 seconds and NE 1 foot at 3 seconds. .TUE AND TUE NIGHT...E 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 3 seconds. .WED...E winds 10 to 15 kt. Seas 6 to 7 ft. Wave Detail: E 7 ft at 10 seconds. .WED NIGHT THROUGH THU NIGHT...SE winds around 10 kt. Seas 5 to 7 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. $$ ANZ255-230000- Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket- 703 AM EDT Sun Sep 22 2024 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH MONDAY AFTERNOON... .TODAY...NE winds 20 to 25 kt with gusts up to 30 kt. Seas 6 to 9 ft. Wave Detail: E 8 ft at 9 seconds and N 4 ft at 4 seconds. Patchy fog this morning. A chance of rain this morning. .TONIGHT...NE winds 20 to 25 kt with gusts up to 30 kt. Seas 7 to 10 ft. Wave Detail: E 8 ft at 10 seconds and NE 4 ft at 5 seconds. A chance of drizzle in the evening. .MON...NE winds 20 to 25 kt, diminishing to 15 to 20 kt in the afternoon. Seas 6 to 9 ft. Wave Detail: E 9 ft at 11 seconds and NE 3 ft at 5 seconds. .MON NIGHT...NE winds 15 to 20 kt. Seas 6 to 9 ft. Wave Detail: E 8 ft at 11 seconds and NE 2 ft at 4 seconds. .TUE AND TUE NIGHT...E winds 15 to 20 kt. Seas 5 to 8 ft. Wave Detail: E 7 ft at 10 seconds and NE 2 ft at 4 seconds. .WED...E winds 10 to 15 kt. Seas 5 to 7 ft. Wave Detail: E 6 ft at 10 seconds and NE 1 foot at 3 seconds. .WED NIGHT THROUGH THU NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ256-230000- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island- 703 AM EDT Sun Sep 22 2024 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH MONDAY AFTERNOON... .TODAY...NE winds 20 to 25 kt with gusts up to 30 kt. Seas 5 to 7 ft. Wave Detail: E 7 ft at 9 seconds and N 4 ft at 5 seconds. A chance of rain this morning. .TONIGHT...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 5 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 5 to 8 ft. Wave Detail: E 8 ft at 11 seconds and NE 3 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 AND TUE NIGHT...E 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. .WED...E winds 10 to 15 kt. Seas 4 to 6 ft. Wave Detail: E 6 ft at 10 seconds. .WED NIGHT THROUGH THU NIGHT...E winds 10 to 15 kt. Seas 4 to 5 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. $$ ANZ232-230000- Nantucket Sound- 703 AM EDT Sun Sep 22 2024 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH MONDAY AFTERNOON... .TODAY...NE winds 15 to 20 kt with gusts up to 30 kt. Seas 4 to 6 ft. Wave Detail: NE 4 ft at 4 seconds and E 3 ft at 9 seconds. A slight chance of rain this morning. .TONIGHT...NE winds 20 to 25 kt with gusts up to 30 kt. Seas 4 to 6 ft. Wave Detail: NE 4 ft at 4 seconds and E 4 ft at 11 seconds. A chance of drizzle in the evening. .MON...NE winds 20 to 25 kt, diminishing to 15 to 20 kt in the afternoon. Seas 4 to 6 ft. Wave Detail: NE 4 ft at 4 seconds and E 4 ft at 11 seconds. .MON NIGHT...NE winds 15 to 20 kt. Seas 4 to 6 ft. Wave Detail: E 4 ft at 11 seconds and NE 3 ft at 4 seconds. .TUE AND TUE NIGHT...E winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. Wave Detail: E 4 ft at 11 seconds and NE 3 ft at 4 seconds. .WED...E winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: E 3 ft at 10 seconds and E 2 ft at 3 seconds. .WED NIGHT THROUGH THU NIGHT...SE winds 10 to 15 kt. Seas 3 to 4 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ233-230000- Vineyard Sound- 703 AM EDT Sun Sep 22 2024 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH MONDAY AFTERNOON... .TODAY...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 4 ft. Wave Detail: N 3 ft at 4 seconds and E 2 ft at 10 seconds. A slight chance of rain this morning. .TONIGHT...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 4 ft. Wave Detail: NE 3 ft at 4 seconds and E 2 ft at 10 seconds. .MON...NE winds 15 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. Gusts up to 20 kt in the evening. Seas around 3 ft. Wave Detail: E 3 ft at 11 seconds and NE 2 ft at 4 seconds. .TUE AND TUE NIGHT...E winds 10 to 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. .WED...E winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: E 2 ft at 10 seconds and NE 1 foot at 3 seconds. .WED NIGHT THROUGH THU NIGHT...SE winds 10 to 15 kt. Seas 2 to 3 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. $$ ANZ234-230000- Buzzards Bay- 703 AM EDT Sun Sep 22 2024 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH MONDAY AFTERNOON... .TODAY...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail: N 3 ft at 4 seconds and E 3 ft at 9 seconds. A slight chance of rain this morning. .TONIGHT...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: NE 3 ft at 4 seconds and E 3 ft at 10 seconds. .MON...NE winds around 15 kt with gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail: E 3 ft at 11 seconds and NE 2 ft at 3 seconds. .MON NIGHT...NE winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas 3 to 5 ft. Wave Detail: E 3 ft at 11 seconds and NE 2 ft at 3 seconds. .TUE AND TUE NIGHT...E winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Wave Detail: E 3 ft at 11 seconds and NE 2 ft at 3 seconds. .WED...E winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: E 2 ft at 10 seconds and E 1 foot at 3 seconds. .WED NIGHT THROUGH THU NIGHT...E winds 10 to 15 kt. Seas 2 to 3 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ235-230000- Rhode Island Sound- 703 AM EDT Sun Sep 22 2024 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH MONDAY AFTERNOON... .TODAY...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 5 ft. Wave Detail: N 4 ft at 4 seconds and E 3 ft at 9 seconds. A slight chance of rain this morning. .TONIGHT...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 5 ft. Wave Detail: NE 4 ft at 5 seconds and E 3 ft at 10 seconds. .MON...NE winds 15 to 20 kt. Seas 4 to 5 ft. Wave Detail: NE 4 ft at 5 seconds and SE 4 ft at 11 seconds. .MON NIGHT...NE winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Seas 4 to 5 ft. Wave Detail: E 4 ft at 11 seconds and NE 3 ft at 4 seconds. .TUE AND TUE NIGHT...E winds 10 to 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 3 seconds. .WED...E winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: SE 4 ft at 10 seconds and NE 1 foot at 3 seconds. .WED NIGHT THROUGH THU NIGHT...E winds 10 to 15 kt. Seas 3 to 4 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. $$ ANZ237-230000- Block Island Sound- 703 AM EDT Sun Sep 22 2024 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH MONDAY AFTERNOON... .TODAY...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail: E 4 ft at 9 seconds and NE 3 ft at 5 seconds. .TONIGHT...NE winds 10 to 15 kt with gusts up to 25 kt. Seas 4 to 5 ft. Wave Detail: E 4 ft at 9 seconds and NE 3 ft at 5 seconds. .MON...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 5 ft. Wave Detail: E 5 ft at 11 seconds and E 3 ft at 5 seconds. .MON NIGHT...NE winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas 4 to 5 ft. Wave Detail: E 5 ft at 11 seconds and NE 2 ft at 5 seconds. .TUE AND TUE NIGHT...E winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 5 ft. Wave Detail: E 5 ft at 11 seconds and NE 1 foot at 4 seconds. .WED...E winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: E 4 ft at 10 seconds and NE 1 foot at 3 seconds. .WED NIGHT THROUGH THU NIGHT...NE winds 10 to 15 kt. Seas 3 to 4 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ230-230000- Boston Harbor- 703 AM EDT Sun Sep 22 2024 .TODAY...NE winds 10 to 15 kt with gusts up to 20 kt. Waves 2 to 3 ft, except 4 to 6 ft at the outer harbor entrance. .TONIGHT...NE winds 10 to 15 kt. Gusts up to 20 kt in the evening. Waves 2 to 3 ft in the evening, then 1 foot or less. At the outer harbor entrance, waves 3 to 5 ft. .MON...NE winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Waves 2 to 3 ft, except 4 to 6 ft at the outer harbor entrance. .MON NIGHT...NE winds 10 to 15 kt, diminishing to 5 to 10 kt after midnight. Waves around 2 ft in the evening, then 1 foot or less. At the outer harbor entrance, waves 3 to 5 ft. .TUE AND TUE NIGHT...E winds 5 to 10 kt. Waves 2 to 3 ft. .WED...E winds 5 to 10 kt. Waves 2 to 3 ft. .WED NIGHT THROUGH THU NIGHT...E winds 5 to 10 kt. Waves 2 to 3 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. $$ ANZ236-230000- Narragansett Bay- 703 AM EDT Sun Sep 22 2024 .TODAY...NE winds 10 to 15 kt with gusts up to 20 kt. Waves 2 to 3 ft. A slight chance of rain this morning. .TONIGHT...NE winds 10 to 15 kt. Gusts up to 20 kt in the evening. Waves 2 to 3 ft. .MON...NE winds 10 to 15 kt with gusts up to 20 kt. Waves 2 to 3 ft. .MON NIGHT...NE winds 5 to 10 kt. Gusts up to 20 kt in the evening. Waves 2 to 3 ft. .TUE AND TUE NIGHT...NE winds 10 to 15 kt. Waves 2 to 3 ft. .WED...E winds 5 to 10 kt. Waves 2 to 3 ft. .WED NIGHT THROUGH THU NIGHT...E winds 5 to 10 kt. Waves 2 to 4 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ 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