Coastal Waters Forecast
Issued by NWS Boston, MA

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000 FZUS51 KBOX 092048 CWFBOX Coastal Waters Forecast National Weather Service Boston/Norton MA 348 PM EST Sun Dec 9 2018 Coastal waters from the Merrimack River MA to Watch Hill RI out to 25 NM ANZ200-100930- 348 PM EST Sun Dec 9 2018 .Synopsis for Massachusetts and Rhode Island coastal waters... High pres shifts east of the waters tonight. A coastal low will strengthen off the mid Atlc coast and track well southeast of Nantucket on Mon while high pres over Quebec builds south over New England. Ocean effect flurries are possible Mon across the waters surrouding Cape Cod and Nantucket. High pres returns over the waters Tue through Thu. Ocean effect snow bands will develop across the eastern Massachusetts waters Tue night and Wed. The high will shift east Fri and be trailed by low pres moving across the waters this weekend. 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. $$ ANZ250-100930- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 348 PM EST Sun Dec 9 2018 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH MONDAY AFTERNOON... .TONIGHT...W winds 10 to 15 kt with gusts up to 25 kt. Seas 3 to 4 ft. .MON...N winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 3 ft. A chance of flurries. .MON NIGHT...N winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt after midnight. Seas around 2 ft. A chance of flurries in the evening. .TUE...NE winds 5 to 10 kt, becoming SW in the afternoon. Seas around 4 ft. .TUE NIGHT...NW winds 5 to 10 kt, becoming N 10 to 15 kt after midnight. Seas around 4 ft. A chance of snow after midnight. .WED...N winds 10 to 15 kt, increasing to 15 to 20 kt in the afternoon. Gusts up to 30 kt. Seas 5 to 6 ft. A chance of snow. Vsby 1 to 3 NM. .WED NIGHT...N winds 15 to 20 kt with gusts up to 30 kt, diminishing to 10 to 15 kt with gusts up to 20 kt after midnight. Seas 6 to 7 ft. .THU...NE winds 5 to 10 kt, becoming SW in the afternoon. Seas 4 to 5 ft. .THU NIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Seas around 4 ft. .FRI...S winds 10 to 15 kt. Gusts up to 20 kt in the morning. Seas around 4 ft. .FRI NIGHT...SE winds 10 to 15 kt. Gusts up to 20 kt after midnight. Seas 4 to 5 ft. A chance of rain. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ251-100930- Massachusetts Bay and Ipswich Bay- 348 PM EST Sun Dec 9 2018 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH MONDAY MORNING... .TONIGHT...W winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 3 ft. .MON...N winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. .MON NIGHT...N winds 10 to 15 kt, diminishing to 5 to 10 kt after midnight. Seas around 2 ft. .TUE...N winds 5 to 10 kt, becoming W in the afternoon. 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, increasing to 15 to 20 kt in the afternoon. Gusts up to 25 kt. Seas 4 to 5 ft. A chance of snow in the afternoon. .WED NIGHT...N winds 10 to 15 kt with gusts up to 25 kt. Seas around 5 ft. .THU...NW winds 5 to 10 kt, becoming SW in the afternoon. Seas around 4 ft. .THU NIGHT...S winds 5 to 10 kt with gusts up to 20 kt. Seas around 3 ft. .FRI...S winds 5 to 10 kt. Seas around 3 ft. .FRI NIGHT...SE winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt after midnight. Seas 3 to 4 ft. A chance of rain. 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. $$ ANZ231-100930- Cape Cod Bay- 348 PM EST Sun Dec 9 2018 .TONIGHT...SW winds 10 to 15 kt, becoming NW 5 to 10 kt after midnight. Gusts up to 20 kt. Seas around 2 ft. .MON...N winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. A chance of flurries. .MON NIGHT...N winds 5 to 10 kt. Gusts up to 20 kt in the evening. Seas 1 foot or less, then around 2 ft after midnight. A chance of flurries in the evening. .TUE...NE winds around 5 kt, becoming S in the afternoon. Seas around 2 ft. .TUE NIGHT...NW winds around 5 kt, increasing to 5 to 10 kt after midnight. Seas 2 to 3 ft. A chance of snow. Vsby 1 to 3 NM. .WED...N winds 10 to 15 kt, increasing to 15 to 20 kt in the afternoon. Gusts up to 30 kt. Seas around 3 ft, building to 5 ft in the afternoon. A chance of snow. Vsby 1 to 3 NM. .WED NIGHT...N winds 10 to 15 kt with gusts up to 25 kt. Seas 4 to 5 ft. .THU...NE winds 5 to 10 kt, becoming S in the afternoon. Seas 3 to 4 ft. .THU NIGHT...S winds 5 to 10 kt. Gusts up to 20 kt after midnight. Seas around 3 ft. .FRI...S winds 5 to 10 kt. Seas around 3 ft. .FRI NIGHT...SE winds 10 to 15 kt. Gusts up to 20 kt after midnight. Seas 3 to 4 ft. A chance of rain. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ254-100930- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm- 348 PM EST Sun Dec 9 2018 ...SMALL CRAFT ADVISORY IN EFFECT FROM MONDAY MORNING THROUGH MONDAY AFTERNOON... .TONIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas around 3 ft. .MON...N winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 3 ft. A chance of flurries. .MON NIGHT...N winds 10 to 15 kt with gusts up to 25 kt, diminishing to 5 to 10 kt after midnight. Seas 3 to 4 ft. A chance of flurries in the evening. .TUE...E winds 5 to 10 kt. Seas around 5 ft. .TUE NIGHT...NW winds 5 to 10 kt. Seas around 4 ft. A chance of snow. Vsby 1 to 3 NM. .WED...N winds 10 to 15 kt, increasing to 15 to 20 kt in the afternoon. Gusts up to 30 kt. Seas 5 to 6 ft. A chance of snow. Vsby 1 to 3 NM. .WED NIGHT...N winds 15 to 20 kt with gusts up to 30 kt, diminishing to 10 to 15 kt with gusts up to 20 kt after midnight. Seas around 7 ft. .THU...NE winds 5 to 10 kt, becoming SE in the afternoon. Seas around 5 ft. .THU NIGHT...S winds 5 to 10 kt with gusts up to 20 kt. Seas 4 to 5 ft. .FRI...S winds 5 to 10 kt, increasing to 10 to 15 kt in the afternoon. Seas 4 to 5 ft. .FRI NIGHT...SE winds 10 to 15 kt with gusts up to 25 kt. Seas 5 to 6 ft. A chance of rain after midnight. 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. $$ ANZ255-100930- Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket- 348 PM EST Sun Dec 9 2018 ...SMALL CRAFT ADVISORY IN EFFECT FROM MONDAY MORNING THROUGH MONDAY AFTERNOON... .TONIGHT...SW winds 5 to 10 kt, becoming NW 10 to 15 kt after midnight. Gusts up to 20 kt. Seas around 2 ft. .MON...N winds 10 to 15 kt with gusts up to 25 kt. Seas around 3 ft. .MON NIGHT...N winds 10 to 15 kt with gusts up to 25 kt, diminishing to 5 to 10 kt after midnight. Seas around 3 ft, building to 5 ft after midnight. .TUE...NE winds 5 to 10 kt. Seas around 5 ft. .TUE NIGHT...NW winds 5 to 10 kt. Seas around 4 ft. A chance of snow. Vsby 1 to 3 NM. .WED...N winds 10 to 15 kt, increasing to 15 to 20 kt in the afternoon. Gusts up to 25 kt. Seas 4 to 5 ft. .WED NIGHT...N winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 5 to 6 ft. .THU...NE winds 5 to 10 kt, becoming SE in the afternoon. Seas 4 to 5 ft. .THU NIGHT...S winds 5 to 10 kt with gusts up to 20 kt. Seas around 4 ft. .FRI...S winds 10 to 15 kt. Seas 4 to 5 ft. .FRI NIGHT...SE winds 10 to 15 kt. Gusts up to 30 kt. Seas 6 to 7 ft. A chance of rain after midnight. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ256-100930- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island- 348 PM EST Sun Dec 9 2018 ...SMALL CRAFT ADVISORY IN EFFECT FROM MONDAY MORNING THROUGH MONDAY AFTERNOON... .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 25 kt. Seas around 3 ft. .MON NIGHT...N winds 10 to 15 kt with gusts up to 20 kt, becoming NE 5 to 10 kt after midnight. Seas 4 to 5 ft. .TUE...NE winds 5 to 10 kt, becoming N in the afternoon. Seas around 5 ft. .TUE NIGHT...NW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt after midnight. Seas around 4 ft. .WED...N winds 10 to 15 kt, increasing to 15 to 20 kt in the afternoon. Gusts up to 25 kt. 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, becoming SE in the afternoon. Seas around 4 ft. .THU NIGHT...S winds around 10 kt with gusts up to 20 kt. Seas around 4 ft. .FRI...S winds 10 to 15 kt. Seas 4 to 5 ft. .FRI NIGHT...SE winds 10 to 15 kt. Gusts up to 30 kt. Seas 6 to 7 ft. A chance of rain. 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. $$ ANZ232-100930- Nantucket Sound- 348 PM EST Sun Dec 9 2018 .TONIGHT...W winds 5 to 10 kt, becoming NW after midnight. Gusts up to 20 kt. Seas around 2 ft. .MON...N winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. A chance of flurries. .MON NIGHT...N winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt after midnight. Seas around 2 ft. A chance of flurries in the evening. .TUE...NE winds around 5 kt. Seas around 3 ft. .TUE NIGHT...NW winds 5 to 10 kt. Seas around 3 ft. A chance of snow. Vsby 1 to 3 NM. .WED...N winds 10 to 15 kt with gusts up to 25 kt. Seas 3 to 4 ft. A chance of snow. Vsby 1 to 3 NM. .WED NIGHT...N winds 10 to 15 kt with gusts up to 25 kt. Seas around 4 ft. .THU...NE winds 5 to 10 kt, becoming SE in the afternoon. Seas around 3 ft. .THU NIGHT...S winds 5 to 10 kt with gusts up to 20 kt. Seas around 3 ft. .FRI...S winds 5 to 10 kt, increasing to 10 to 15 kt in the afternoon. Seas 3 to 4 ft. .FRI NIGHT...SE winds 10 to 15 kt with gusts up to 25 kt. Seas 4 to 5 ft. A chance of rain. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ233-100930- Vineyard Sound- 348 PM EST Sun Dec 9 2018 .TONIGHT...W 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 2 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 2 ft. .TUE...NE winds 5 to 10 kt, becoming E in the afternoon. Seas around 3 ft. .TUE NIGHT...NW winds 5 to 10 kt. Seas around 3 ft. A chance of snow in the evening. .WED...N winds 10 to 15 kt with gusts up to 25 kt. 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 with gusts up to 20 kt. Seas around 3 ft. .FRI...S winds 5 to 10 kt, increasing to 10 to 15 kt in the afternoon. Seas around 3 ft. .FRI NIGHT...SE winds 10 to 15 kt with gusts up to 25 kt. Seas 4 to 5 ft. A chance of rain. 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. $$ ANZ234-100930- Buzzards Bay- 348 PM EST Sun Dec 9 2018 .TONIGHT...W winds 5 to 10 kt, becoming NW after midnight. Gusts up to 20 kt. Seas around 2 ft. .MON...N winds 10 to 15 kt with gusts up to 20 kt. Seas around 3 ft. .MON NIGHT...N winds 5 to 10 kt. Gusts up to 20 kt in the evening. Seas around 2 ft. .TUE...N winds 5 to 10 kt, becoming SW in the afternoon. Seas 2 to 3 ft. .TUE NIGHT...NW winds around 5 kt, increasing to 5 to 10 kt after midnight. Seas around 2 ft. A chance of snow in the evening. .WED...N winds 5 to 10 kt, increasing to 10 to 15 kt in the afternoon. Gusts up to 20 kt. Seas around 2 ft. .WED NIGHT...N winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. .THU...NE winds 5 to 10 kt, becoming SE in the afternoon. Seas around 2 ft. .THU NIGHT...S winds 5 to 10 kt. Seas around 2 ft. .FRI...S winds 5 to 10 kt. Seas 2 to 3 ft. .FRI NIGHT...SE winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 25 kt after midnight. Seas 3 to 4 ft. A chance of rain. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ235-100930- Rhode Island Sound- 348 PM EST Sun Dec 9 2018 .TONIGHT...W winds 10 to 15 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 3 to 4 ft. .TUE...NE winds 5 to 10 kt, becoming NW in the afternoon. Seas around 4 ft. .TUE NIGHT...NW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt after midnight. Seas around 3 ft. .WED...N winds 10 to 15 kt with gusts up to 25 kt. 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 after midnight. Gusts up to 20 kt. Seas around 3 ft. .FRI...S winds 5 to 10 kt, becoming SE 10 to 15 kt in the afternoon. Seas 3 to 4 ft. .FRI NIGHT...SE winds 10 to 15 kt. Gusts up to 30 kt. Seas 5 to 6 ft. A chance of rain. 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. $$ ANZ237-100930- Block Island Sound- 348 PM EST Sun Dec 9 2018 .TONIGHT...W winds 5 to 10 kt, becoming NW after midnight. Gusts up to 20 kt. Seas around 2 ft. .MON...N winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. .MON NIGHT...N winds 5 to 10 kt. Gusts up to 20 kt in the evening. Seas 3 to 4 ft. .TUE...NE winds 5 to 10 kt, becoming NW in the afternoon. Seas around 4 ft. .TUE NIGHT...NW winds 5 to 10 kt. Seas around 3 ft. .WED...N winds 10 to 15 kt with gusts up to 20 kt. Seas around 3 ft. .WED NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas around 3 ft. .THU...E winds 5 to 10 kt, becoming SE in the afternoon. Seas around 3 ft. .THU NIGHT...S winds 5 to 10 kt. Seas around 3 ft. .FRI...SE winds 5 to 10 kt. Seas 3 to 4 ft. .FRI NIGHT...SE winds 10 to 15 kt with gusts up to 25 kt. Seas 5 to 6 ft. A chance of rain. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ230-100930- Boston Harbor- 348 PM EST Sun Dec 9 2018 .TONIGHT...W winds 5 to 10 kt with gusts up to 20 kt. Waves around 2 ft. .MON...N winds 5 to 10 kt with gusts up to 20 kt. Waves around 2 ft in the morning, then 1 foot or less. .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 around 5 kt, increasing to 5 to 10 kt after midnight. Waves 1 foot or less. .WED...N winds 5 to 10 kt, increasing to 10 to 15 kt in the afternoon. Gusts up to 20 kt. Waves around 2 ft. .WED NIGHT...N winds 5 to 10 kt. Gusts up to 20 kt in the evening. Waves around 2 ft in the evening, then 1 foot or less. .THU...NW winds 5 to 10 kt, becoming S in the afternoon. Waves 1 foot or less. .THU NIGHT...S winds 5 to 10 kt. Waves 1 foot or less. .FRI...S winds 5 to 10 kt. Waves 1 foot or less. .FRI NIGHT...SE winds 5 to 10 kt. Waves 1 foot or less, then around 2 ft after midnight. A chance of rain. 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. $$ ANZ236-100930- Narragansett Bay- 348 PM EST Sun Dec 9 2018 .TONIGHT...W winds 5 to 10 kt, becoming NW with gusts up to 20 kt after midnight. Waves 1 foot or less. .MON...N winds 10 to 15 kt with gusts up to 20 kt. Waves around 2 ft. .MON NIGHT...N winds 5 to 10 kt. Gusts up to 20 kt in the evening. Waves 2 to 3 ft. .TUE...N winds around 5 kt, becoming SW in the afternoon. Waves 2 to 3 ft. .TUE NIGHT...NW winds 5 to 10 kt. Waves around 2 ft. .WED...N winds 5 to 10 kt. Gusts up to 20 kt in the afternoon. Waves around 2 ft. .WED NIGHT...N winds 5 to 10 kt. Gusts up to 20 kt in the evening. Waves around 2 ft. .THU...NE winds 5 to 10 kt, becoming SE in the afternoon. Waves around 2 ft. .THU NIGHT...S winds 5 to 10 kt. Waves around 2 ft. .FRI...S winds 5 to 10 kt. Waves 2 to 3 ft. .FRI NIGHT...SE winds 5 to 10 kt. Gusts up to 20 kt after midnight. Waves 3 to 4 ft. A chance of rain. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ 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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