Coastal Waters Forecast
Issued by NWS Boston, MA

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000 FZUS51 KBOX 090831 CWFBOX Coastal Waters Forecast National Weather Service Boston/Norton MA 331 AM EST Sun Dec 9 2018 Coastal waters from the Merrimack River MA to Watch Hill RI out to 25 NM ANZ200-092130- 331 AM EST Sun Dec 9 2018 .Synopsis for Massachusetts and Rhode Island coastal waters... High pres will build over the waters today, then shift east tonight. A coastal low will strengthen off the mid Atlc coast and track well southeast of Nantucket Mon. High pres returns over the waters Tue through Thu. Ocean effect snow bands will develop across the eastern Massachusetts waters, moving into Plymouth county, Cape Cod and the islands Tue night through Wed night. For information on possible hazardous weather beyond the 24-36 hour forecast period, please visit www.weather.gov/boston and follow the Current Hazards link above the map on the left. $$ ANZ250-092130- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 331 AM EST Sun Dec 9 2018 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 AM EST THIS MORNING... .TODAY...W winds 10 to 15 kt with gusts up to 25 kt. Seas 3 to 4 ft. .TONIGHT...SW winds 15 to 20 kt, becoming NW 10 to 15 kt after midnight. Gusts up to 25 kt. Seas around 4 ft. .MON...N winds 10 to 15 kt with gusts up to 20 kt. Seas around 4 ft. .MON NIGHT...N winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt after midnight. Seas 3 to 4 ft. .TUE...NW winds 5 to 10 kt. Seas around 4 ft. .TUE NIGHT...NW winds 5 to 10 kt, becoming N 10 to 15 kt after midnight. Seas around 4 ft. .WED...N winds 15 to 20 kt with gusts up to 25 kt. Seas 5 to 6 ft. A chance of snow showers. Vsby 1 to 3 NM. .WED NIGHT...N winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 6 to 7 ft. .THU...N winds 5 to 10 kt, becoming SW in the afternoon. Seas around 5 ft. .THU NIGHT...SW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt after midnight. Seas around 4 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ251-092130- Massachusetts Bay and Ipswich Bay- 331 AM EST Sun Dec 9 2018 .TODAY...W winds 5 to 10 kt, becoming SW 10 to 15 kt this afternoon. Gusts up to 20 kt. Seas around 2 ft. .TONIGHT...SW winds 10 to 15 kt, becoming NW after midnight. Gusts up to 25 kt. Seas 2 to 3 ft. .MON...N winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. .MON NIGHT...N winds 10 to 15 kt, becoming NW 5 to 10 kt after midnight. Seas around 3 ft. .TUE...NW winds 5 to 10 kt. Seas 2 to 3 ft. .TUE NIGHT...NW winds 5 to 10 kt. Seas 2 to 3 ft. .WED...N winds 10 to 15 kt with gusts up to 25 kt. Seas 4 to 5 ft. .WED NIGHT...N winds 10 to 15 kt with gusts up to 25 kt. Seas around 5 ft. .THU...N winds 5 to 10 kt, becoming SW in the afternoon. Seas around 4 ft. .THU NIGHT...S winds 5 to 10 kt. Seas around 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. $$ ANZ231-092130- Cape Cod Bay- 331 AM EST Sun Dec 9 2018 .TODAY...W winds 5 to 10 kt with gusts up to 20 kt. Seas 2 to 3 ft. .TONIGHT...SW winds 10 to 15 kt, becoming NW 5 to 10 kt after midnight. Gusts up to 20 kt. Seas around 2 ft. .MON...N winds 10 to 15 kt with gusts up to 20 kt. Seas around 3 ft. .MON NIGHT...N winds 5 to 10 kt. Seas around 3 ft. .TUE...W winds 5 to 10 kt. Seas around 2 ft. .TUE NIGHT...NW winds 5 to 10 kt. Seas around 3 ft. .WED...N winds 10 to 15 kt, increasing to 15 to 20 kt in the afternoon. Gusts up to 25 kt. Seas 4 to 5 ft. A chance of snow showers. Vsby 1 to 3 NM. .WED NIGHT...N winds 10 to 15 kt with gusts up to 25 kt. Seas 4 to 5 ft. .THU...NE winds 5 to 10 kt, becoming SE in the afternoon. Seas 3 to 4 ft. .THU NIGHT...S winds 5 to 10 kt. Seas around 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ254-092130- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm- 331 AM EST Sun Dec 9 2018 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 9 AM EST THIS MORNING... .TODAY...NW winds 5 to 10 kt, becoming SW 10 to 15 kt this afternoon. Gusts up to 20 kt. Seas around 5 ft, subsiding to 3 ft this afternoon. .TONIGHT...SW winds 10 to 15 kt, becoming NW after midnight. Gusts up to 20 kt. Seas around 3 ft. .MON...N winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 5 ft. .MON NIGHT...N winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt after midnight. Seas 4 to 5 ft. .TUE...W winds 5 to 10 kt. Seas around 5 ft. .TUE NIGHT...N winds 5 to 10 kt. Seas around 5 ft. .WED...N winds 10 to 15 kt, increasing to 15 to 20 kt in the afternoon. Gusts up to 25 kt. Seas 5 to 6 ft. A chance of snow showers. Vsby 1 to 3 NM. .WED NIGHT...N winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 25 kt. Seas around 7 ft. A chance of snow showers in the evening with vsby 1 to 3 NM. .THU...NE winds 5 to 10 kt, becoming E in the afternoon. Seas around 5 ft. .THU NIGHT...S winds 5 to 10 kt. Gusts up to 20 kt after midnight. Seas around 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. $$ ANZ255-092130- Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket- 331 AM EST Sun Dec 9 2018 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 6 AM EST EARLY THIS MORNING... .TODAY...NW winds 5 to 10 kt, becoming SW this afternoon. Gusts up to 25 kt early. Seas 3 to 4 ft. .TONIGHT...SW winds 5 to 10 kt, becoming NW 10 to 15 kt with gusts up to 20 kt after midnight. Seas around 2 ft. .MON...N winds 10 to 15 kt with gusts up to 20 kt. Seas around 4 ft. .MON NIGHT...N winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt after midnight. Seas around 5 ft. .TUE...N winds 5 to 10 kt, becoming NW in the afternoon. Seas around 5 ft. .TUE NIGHT...N winds 5 to 10 kt. Seas 4 to 5 ft. .WED...N winds 10 to 15 kt, increasing to 15 to 20 kt with gusts up to 25 kt in the afternoon. Seas 4 to 5 ft. A chance of snow showers in the afternoon. .WED NIGHT...N winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 25 kt. Seas around 6 ft. .THU...E winds 5 to 10 kt. Seas around 5 ft. .THU NIGHT...S winds 5 to 10 kt. Seas around 5 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ256-092130- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island- 331 AM EST Sun Dec 9 2018 .TODAY...NW winds 5 to 10 kt, becoming SW this afternoon. Seas 2 to 3 ft. .TONIGHT...W winds 5 to 10 kt, becoming NW 10 to 15 kt with gusts up to 20 kt after midnight. Seas around 2 ft. .MON...N winds 10 to 15 kt with gusts up to 20 kt. Seas around 4 ft. .MON NIGHT...N winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt after midnight. Seas around 5 ft. .TUE...NE winds 5 to 10 kt, becoming W in the afternoon. Seas around 5 ft. .TUE NIGHT...NW winds 5 to 10 kt, increasing to 10 to 15 kt after midnight. Seas around 4 ft. .WED...N winds 10 to 15 kt, increasing to 15 to 20 kt with gusts up to 25 kt in the afternoon. Seas around 4 ft. .WED NIGHT...N winds 15 to 20 kt, becoming NE 10 to 15 kt after midnight. Gusts up to 25 kt. Seas around 5 ft. .THU...E winds 5 to 10 kt. Seas around 4 ft. .THU NIGHT...S winds 10 to 15 kt. Gusts up to 20 kt after midnight. Seas around 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. $$ ANZ232-092130- Nantucket Sound- 331 AM EST Sun Dec 9 2018 .TODAY...NW winds 5 to 10 kt with gusts up to 20 kt, becoming SW this afternoon. Seas around 2 ft. .TONIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Gusts up to 20 kt. Seas around 2 ft. .MON...N winds 10 to 15 kt with gusts up to 20 kt. Seas around 3 ft. .MON NIGHT...N winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt after midnight. Seas around 3 ft. .TUE...W winds 5 to 10 kt. Seas around 3 ft. .TUE NIGHT...N winds 5 to 10 kt. Seas around 3 ft. .WED...N winds 10 to 15 kt. Gusts up to 25 kt in the afternoon. Seas 3 to 4 ft. A chance of snow showers in the afternoon. .WED NIGHT...N winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 25 kt. Seas around 4 ft. .THU...NE winds 5 to 10 kt, becoming E in the afternoon. Seas around 3 ft. .THU NIGHT...S winds 5 to 10 kt. Seas around 4 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ233-092130- Vineyard Sound- 331 AM EST Sun Dec 9 2018 .TODAY...NW winds 5 to 10 kt, becoming SW this afternoon. Seas 1 foot or less. .TONIGHT...SW winds around 10 kt, becoming NW after midnight. Gusts up to 20 kt. Seas 1 foot or less. .MON...N winds 10 to 15 kt with gusts up to 20 kt. Seas 1 foot or less. .MON NIGHT...N winds 10 to 15 kt, diminishing to 5 to 10 kt after midnight. Seas around 3 ft. .TUE...NW winds 5 to 10 kt. Seas around 3 ft. .TUE NIGHT...NW winds 5 to 10 kt. Seas around 3 ft. .WED...N winds 10 to 15 kt. Gusts up to 25 kt in the afternoon. Seas around 3 ft. .WED NIGHT...N winds 10 to 15 kt with gusts up to 25 kt. Seas around 3 ft. .THU...NE winds 5 to 10 kt, becoming SE in the afternoon. Seas around 2 ft. .THU NIGHT...S winds 5 to 10 kt. Seas around 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. $$ ANZ234-092130- Buzzards Bay- 331 AM EST Sun Dec 9 2018 .TODAY...NW winds 5 to 10 kt, becoming SW this afternoon. Seas 1 foot or less. .TONIGHT...W winds 5 to 10 kt with gusts up to 20 kt, becoming NW after midnight. Seas 1 foot or less. .MON...N winds 10 to 15 kt. Gusts up to 20 kt in the morning. Seas 1 foot or less. .MON NIGHT...N winds 5 to 10 kt. Seas 2 to 3 ft. .TUE...NW winds around 5 kt. Seas 2 to 3 ft. .TUE NIGHT...N winds 5 to 10 kt. Seas around 2 ft. .WED...N winds 10 to 15 kt. Gusts up to 25 kt in the afternoon. Seas around 2 ft. .WED NIGHT...N winds 10 to 15 kt with gusts up to 25 kt. Seas around 2 ft. .THU...NE winds 5 to 10 kt, becoming SE in the afternoon. Seas around 2 ft. .THU NIGHT...S winds 5 to 10 kt. Seas around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ235-092130- Rhode Island Sound- 331 AM EST Sun Dec 9 2018 .TODAY...NW winds 5 to 10 kt, becoming SW this afternoon. Seas around 2 ft this morning, then 1 foot or less. .TONIGHT...W winds 5 to 10 kt, becoming NW 10 to 15 kt after midnight. Gusts up to 20 kt. Seas around 2 ft. .MON...N winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. .MON NIGHT...N winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt after midnight. Seas around 4 ft. .TUE...NW winds 5 to 10 kt. Seas around 4 ft. .TUE NIGHT...NW winds 5 to 10 kt. Seas around 3 ft. .WED...N winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Seas around 3 ft. .WED NIGHT...N winds 10 to 15 kt with gusts up to 25 kt. Seas around 3 ft. .THU...NE winds 5 to 10 kt, becoming SE in the afternoon. Seas around 3 ft. .THU NIGHT...S winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt after midnight. Seas around 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. $$ ANZ237-092130- Block Island Sound- 331 AM EST Sun Dec 9 2018 .TODAY...NW winds 5 to 10 kt, becoming SW this afternoon. Seas 1 foot or less. .TONIGHT...W winds 5 to 10 kt, becoming NW with gusts up to 20 kt after midnight. Seas 1 foot or less, then around 2 ft after midnight. .MON...N winds 10 to 15 kt. Gusts up to 20 kt in the morning. Seas 2 to 3 ft. .MON NIGHT...N winds 5 to 10 kt. Seas 3 to 4 ft. .TUE...NE winds 5 to 10 kt, becoming W in the afternoon. Seas around 4 ft. .TUE NIGHT...NW winds 5 to 10 kt. Seas around 3 ft. .WED...N winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Seas around 3 ft. .WED NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas around 3 ft. .THU...E winds 5 to 10 kt. Seas around 3 ft. .THU NIGHT...S winds 5 to 10 kt. Seas around 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ230-092130- Boston Harbor- 331 AM EST Sun Dec 9 2018 .TODAY...SW winds 5 to 10 kt. Gusts up to 20 kt this afternoon. Waves 1 foot or less, then around 2 ft this afternoon. .TONIGHT...SW winds 5 to 10 kt with gusts up to 20 kt, becoming NW after midnight. Waves around 2 ft in the evening, then 1 foot or less. .MON...NW winds around 10 kt. Waves around 2 ft. .MON NIGHT...NW winds 5 to 10 kt. Waves 1 foot or less. .TUE...NW winds around 5 kt. Waves 1 foot or less. .TUE NIGHT...NW winds 5 to 10 kt. Waves 1 foot or less. .WED...N winds 5 to 10 kt. Gusts up to 20 kt in the afternoon. Waves around 2 ft. .WED NIGHT...N winds 5 to 10 kt. Gusts up to 20 kt in the evening. Waves around 2 ft. .THU...NW winds 5 to 10 kt, becoming SW in the afternoon. Waves 1 foot or less. .THU NIGHT...S winds 5 to 10 kt. Waves 1 foot or less. 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. $$ ANZ236-092130- Narragansett Bay- 331 AM EST Sun Dec 9 2018 .TODAY...NW winds around 5 kt, becoming SW this afternoon. Waves 1 foot or less. .TONIGHT...W winds 5 to 10 kt, becoming NW after midnight. Waves 1 foot or less. .MON...N winds 5 to 10 kt. Waves 1 foot or less. .MON NIGHT...N winds 5 to 10 kt. Waves 2 to 3 ft. .TUE...NW winds around 5 kt. Waves 2 to 3 ft. .TUE NIGHT...NW winds 5 to 10 kt. Waves around 2 ft. .WED...N winds 5 to 10 kt. Gusts up to 20 kt in the afternoon. Waves around 2 ft. .WED NIGHT...N winds 5 to 10 kt with gusts up to 20 kt. Waves around 2 ft. .THU...NE winds 5 to 10 kt, becoming SE in the afternoon. Waves around 2 ft. .THU NIGHT...S winds 5 to 10 kt. Waves around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ 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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