Coastal Waters Forecast
Issued by NWS Boston, MA

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000 FZUS51 KBOX 211116 CWFBOX Coastal Waters Forecast National Weather Service Boston/Norton MA 716 AM EDT Sat Apr 21 2018 Coastal waters from the Merrimack River MA to Watch Hill RI out to 25 NM ANZ200-220000- 716 AM EDT Sat Apr 21 2018 .Synopsis for Massachusetts and Rhode Island coastal waters... High pressure will build over the waters today through Monday. then shift offshore on Tuesday. Low pressure will move north along the eastern seaboard Tuesday night and Wednesday, lifting over the waters on Thursday. 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. $$ ANZ250-220000- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 716 AM EDT Sat Apr 21 2018 .TODAY...NW winds 10 to 15 kt with gusts up to 20 kt, becoming W 5 to 10 kt this afternoon. Seas 2 to 4 ft. .TONIGHT...NW winds 5 to 10 kt. Seas around 2 ft. .SUN...NW winds 5 to 10 kt, becoming SW in the afternoon. Seas around 2 ft. .SUN NIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Seas around 2 ft. .MON...N winds 5 to 10 kt, becoming SE in the afternoon. Seas around 2 ft. .MON NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. .TUE...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. .TUE NIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. .WED...SE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Rain likely. .WED NIGHT...E winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Showers likely. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ251-220000- Massachusetts Bay and Ipswich Bay- 716 AM EDT Sat Apr 21 2018 .TODAY...NW winds 10 to 15 kt with gusts up to 20 kt, becoming W 5 to 10 kt this afternoon. Seas around 2 ft. .TONIGHT...NW winds 5 to 10 kt. Seas 1 foot or less. .SUN...NW winds 5 to 10 kt, becoming S in the afternoon. Seas 1 foot or less. .SUN NIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Seas 1 foot or less. .MON...N winds around 5 kt, becoming SE in the afternoon. Seas around 2 ft. .MON NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. .TUE...SW winds 5 to 10 kt. Seas 2 to 3 ft. .TUE NIGHT...S winds 10 to 15 kt. Seas 2 to 3 ft. .WED...SE winds 5 to 10 kt. Seas 2 to 3 ft. Rain likely. .WED NIGHT...E winds 5 to 10 kt. Seas 2 to 3 ft. Showers likely. 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. $$ ANZ231-220000- Cape Cod Bay- 716 AM EDT Sat Apr 21 2018 .TODAY...NW winds 10 to 15 kt with gusts up to 20 kt, becoming W 5 to 10 kt this afternoon. Seas around 2 ft. .TONIGHT...W winds around 5 kt, becoming NW after midnight. Seas 1 foot or less. .SUN...NW winds 5 to 10 kt, becoming NE in the afternoon. Seas 1 foot or less. .SUN NIGHT...S winds 5 to 10 kt, becoming NW after midnight. Seas 1 foot or less. .MON...N winds around 5 kt, becoming E around 5 kt in the afternoon. Seas 1 foot or less. .MON NIGHT...S winds 5 to 10 kt. Seas 1 foot or less. .TUE...SW winds 5 to 10 kt. Seas around 2 ft. .TUE NIGHT...S winds 5 to 10 kt. Seas around 2 ft. .WED...SE winds 10 to 15 kt with gusts up to 20 kt. Seas 1 foot or less. Rain likely. .WED NIGHT...E winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Showers likely. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ254-220000- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm- 716 AM EDT Sat Apr 21 2018 .TODAY...NW winds 10 to 15 kt, becoming W 5 to 10 kt this afternoon. Gusts up to 20 kt. Seas 2 to 4 ft. .TONIGHT...W winds 5 to 10 kt, becoming NW after midnight. Seas 2 to 3 ft. .SUN...NW winds 5 to 10 kt. Seas around 2 ft. .SUN NIGHT...W winds 5 to 10 kt. Seas around 2 ft. .MON...N winds around 5 kt, becoming NE around 5 kt in the afternoon. Seas around 2 ft. .MON NIGHT...S winds 5 to 10 kt. Seas around 2 ft. .TUE...S winds 5 to 10 kt. Seas 2 to 3 ft. .TUE NIGHT...S winds 10 to 15 kt. Seas 2 to 3 ft. .WED...SE winds 15 to 20 kt. Seas 2 to 4 ft. Rain likely. .WED NIGHT...SE winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 6 ft. Showers likely. 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. $$ ANZ255-220000- Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket- 716 AM EDT Sat Apr 21 2018 .TODAY...W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. .TONIGHT...W winds 10 to 15 kt with gusts up to 20 kt, becoming NW 5 to 10 kt after midnight. Seas 2 to 3 ft. .SUN...NW winds 5 to 10 kt, becoming W in the afternoon. Seas around 2 ft. .SUN NIGHT...W winds 5 to 10 kt. Seas around 2 ft. .MON...N winds 5 to 10 kt, becoming E in the afternoon. Seas around 2 ft. .MON NIGHT...S winds 5 to 10 kt. Seas around 2 ft. .TUE...S winds 5 to 10 kt. Seas around 2 ft. .TUE NIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. .WED...SE winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 6 ft. Rain likely. .WED NIGHT...SE winds 10 to 15 kt with gusts up to 20 kt. Seas 5 to 8 ft. Showers likely. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ256-220000- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island- 716 AM EDT Sat Apr 21 2018 .TODAY...W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. .TONIGHT...W winds 10 to 15 kt with gusts up to 20 kt, becoming N 5 to 10 kt after midnight. Seas 2 to 3 ft. .SUN...NW winds 5 to 10 kt, becoming SW 10 to 15 kt in the afternoon. Seas around 2 ft. .SUN NIGHT...SW winds 10 to 15 kt, becoming NW 5 to 10 kt after midnight. Seas 2 to 3 ft. .MON...N winds 5 to 10 kt, becoming SE in the afternoon. Seas around 2 ft. .MON NIGHT...S winds 5 to 10 kt. Seas around 2 ft. .TUE...S winds 5 to 10 kt. Seas around 2 ft. .TUE NIGHT...SE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. .WED...SE winds 15 to 20 kt. Seas 4 to 7 ft. Rain likely. .WED NIGHT...E winds 10 to 15 kt with gusts up to 20 kt. Seas 6 to 9 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. $$ ANZ232-220000- Nantucket Sound- 716 AM EDT Sat Apr 21 2018 .TODAY...NW winds 10 to 15 kt with gusts up to 20 kt, becoming W 5 to 10 kt this afternoon. Seas around 2 ft. .TONIGHT...W winds 5 to 10 kt, becoming NW after midnight. Seas 1 foot or less. .SUN...NW winds 5 to 10 kt, becoming SW in the afternoon. Seas 1 foot or less. .SUN NIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Seas 1 foot or less. .MON...N winds around 5 kt, becoming SE in the afternoon. Seas 1 foot or less. .MON NIGHT...S winds 5 to 10 kt. Seas 1 foot or less. .TUE...S winds 5 to 10 kt. Seas around 2 ft. .TUE NIGHT...S winds 10 to 15 kt. Seas around 2 ft. .WED...SE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Rain likely. .WED NIGHT...SE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Showers likely. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ233-220000- Vineyard Sound- 716 AM EDT Sat Apr 21 2018 .TODAY...W winds 10 to 15 kt. Seas around 2 ft. .TONIGHT...W winds 10 to 15 kt, becoming NW 5 to 10 kt after midnight. Seas around 2 ft. .SUN...NW winds 5 to 10 kt, becoming SW in the afternoon. Seas 1 foot or less. .SUN NIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Seas 1 foot or less. .MON...N winds around 5 kt, becoming SE in the afternoon. Seas 1 foot or less. .MON NIGHT...S winds 5 to 10 kt. Seas 1 foot or less. .TUE...S winds 5 to 10 kt. Seas around 2 ft. .TUE NIGHT...S winds around 10 kt. Seas around 2 ft. .WED...SE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Rain likely. .WED NIGHT...E winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Showers likely. 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. $$ ANZ234-220000- Buzzards Bay- 716 AM EDT Sat Apr 21 2018 .TODAY...NW winds 5 to 10 kt, becoming W 10 to 15 kt this afternoon. Seas 1 foot or less. .TONIGHT...NW winds 5 to 10 kt. Seas 1 foot or less. .SUN...NW winds 5 to 10 kt, becoming SW in the afternoon. Seas 1 foot or less. .SUN NIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Seas 1 foot or less. .MON...N winds around 5 kt, becoming SE in the afternoon. Seas 1 foot or less. .MON NIGHT...S winds 5 to 10 kt. Seas 1 foot or less. .TUE...S winds 5 to 10 kt. Seas 1 foot or less. .TUE NIGHT...S winds 5 to 10 kt. Seas 1 foot or less. .WED...SE winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Rain likely. .WED NIGHT...E winds 5 to 10 kt. Seas 2 to 3 ft. Showers likely. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ235-220000- Rhode Island Sound- 716 AM EDT Sat Apr 21 2018 .TODAY...W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. .TONIGHT...W winds 10 to 15 kt with gusts up to 20 kt, becoming N 5 to 10 kt after midnight. Seas 2 to 3 ft. .SUN...NW winds 5 to 10 kt, becoming SW 10 to 15 kt in the afternoon. Seas around 2 ft. .SUN NIGHT...SW winds 10 to 15 kt, becoming NW 5 to 10 kt after midnight. Seas around 2 ft. .MON...N winds 5 to 10 kt, becoming SE in the afternoon. Seas around 2 ft. .MON NIGHT...S winds 5 to 10 kt. Seas around 2 ft. .TUE...S winds 5 to 10 kt. Seas around 2 ft. .TUE NIGHT...S winds 10 to 15 kt. Seas 2 to 3 ft. .WED...SE winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. Rain likely. .WED NIGHT...E winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 6 ft. Showers likely. 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. $$ ANZ237-220000- Block Island Sound- 716 AM EDT Sat Apr 21 2018 .TODAY...W winds 10 to 15 kt. Gusts up to 20 kt this morning. Seas around 2 ft. .TONIGHT...W winds 10 to 15 kt, becoming NW 5 to 10 kt after midnight. Seas 2 to 3 ft. .SUN...NW winds 5 to 10 kt, becoming SW 10 to 15 kt in the afternoon. Seas around 2 ft. .SUN NIGHT...SW winds 10 to 15 kt, becoming NW 5 to 10 kt after midnight. Seas around 2 ft. .MON...NE winds around 5 kt, becoming S in the afternoon. Seas around 2 ft. .MON NIGHT...S winds 5 to 10 kt. Seas around 2 ft. .TUE...S winds 5 to 10 kt. Seas around 2 ft. .TUE NIGHT...SE winds 10 to 15 kt. Seas 2 to 3 ft. .WED...SE winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. Rain likely. .WED NIGHT...E winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 6 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ230-220000- Boston Harbor- 716 AM EDT Sat Apr 21 2018 .TODAY...NW winds 5 to 10 kt. Waves 1 foot or less. .TONIGHT...NW winds 5 to 10 kt. Waves 1 foot or less. .SUN...NW winds 5 to 10 kt, diminishing to around 5 kt in the afternoon. Waves 1 foot or less. .SUN NIGHT...W winds around 5 kt, becoming NW around 5 kt after midnight. Waves 1 foot or less. .MON...N winds around 5 kt, becoming SE in the afternoon. Waves 1 foot or less. .MON NIGHT...S winds 5 to 10 kt. Waves 1 foot or less. .TUE...SW winds 5 to 10 kt. Waves 1 foot or less. .TUE NIGHT...S winds 5 to 10 kt. Waves 1 foot or less. .WED...SE winds 5 to 10 kt. Waves 1 foot or less. Rain likely. .WED NIGHT...E winds 5 to 10 kt. Waves 1 foot or less. Showers likely. 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. $$ ANZ236-220000- Narragansett Bay- 716 AM EDT Sat Apr 21 2018 .TODAY...NW winds 5 to 10 kt, becoming W 10 to 15 kt this afternoon. Waves around 2 ft. .TONIGHT...NW winds 5 to 10 kt. Waves around 2 ft. .SUN...NW winds around 5 kt, becoming W in the afternoon. Waves 1 foot or less. .SUN NIGHT...W winds 5 to 10 kt, becoming N after midnight. Waves around 2 ft. .MON...N winds around 5 kt, becoming S in the afternoon. Waves 1 foot or less. .MON NIGHT...S winds 5 to 10 kt. Waves around 2 ft. .TUE...S winds 5 to 10 kt. Waves around 2 ft. .TUE NIGHT...S winds 5 to 10 kt. Waves 2 to 3 ft. .WED...SE winds 10 to 15 kt. Waves 2 to 4 ft. Rain likely. .WED NIGHT...E winds 5 to 10 kt. Waves 2 to 4 ft. Showers likely. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ 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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