Coastal Waters Forecast
Issued by NWS Boston, MA

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000 FZUS51 KBOX 210157 CWFBOX Coastal Waters Forecast National Weather Service Boston/Norton MA 957 PM EDT Fri Apr 20 2018 Coastal waters from the Merrimack River MA to Watch Hill RI out to 25 NM ANZ200-211415- 957 PM EDT Fri Apr 20 2018 .Synopsis for Massachusetts and Rhode Island coastal waters... High pressure will build over the waters this weekend lasting into Monday, then shifting 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. $$ ANZ250-211415- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 957 PM EDT Fri Apr 20 2018 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 AM EDT SATURDAY... .OVERNIGHT...NW winds around 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. .SAT...NW winds 10 to 15 kt with gusts up to 20 kt, becoming W 5 to 10 kt in the afternoon. Seas 2 to 4 ft. .SAT NIGHT...NW winds 5 to 10 kt with gusts up to 20 kt. Seas around 2 ft. .SUN...NW winds 5 to 10 kt, becoming SW in the afternoon. Seas around 2 ft. .SUN NIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Seas around 2 ft. .MON...NW winds 5 to 10 kt, becoming S in the afternoon. Seas around 2 ft. .MON NIGHT...SW winds 5 to 10 kt. Seas 2 to 4 ft. .TUE...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. .TUE NIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. A chance of rain. .WED...SE winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. Rain likely. .WED NIGHT...SE winds 10 to 15 kt with gusts up to 25 kt. Seas 4 to 7 ft. Rain likely. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ251-211415- Massachusetts Bay and Ipswich Bay- 957 PM EDT Fri Apr 20 2018 .OVERNIGHT...NW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 3 ft. .SAT...NW winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt in the afternoon. Seas around 2 ft. .SAT NIGHT...NW winds 5 to 10 kt. Gusts up to 20 kt in the evening. Seas around 2 ft. .SUN...NW winds 5 to 10 kt, becoming S in the afternoon. Seas around 2 ft. .SUN NIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Seas 1 foot or less. .MON...NW winds 5 to 10 kt, becoming SE in the afternoon. Seas 1 foot or less. .MON NIGHT...SW 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. A chance of rain. .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. Rain 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. $$ ANZ231-211415- Cape Cod Bay- 957 PM EDT Fri Apr 20 2018 .OVERNIGHT...NW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 3 ft. .SAT...NW winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt in the afternoon. Seas 2 to 3 ft. .SAT NIGHT...SW winds around 5 kt, becoming NW after midnight. Seas around 2 ft. .SUN...NW winds 5 to 10 kt, becoming E in the afternoon. Seas around 2 ft. .SUN NIGHT...S winds 5 to 10 kt, becoming NW after midnight. Seas 1 foot or less. .MON...N winds around 5 kt, becoming SE around 5 kt in the afternoon. Seas 1 foot or less. .MON NIGHT...SW winds 5 to 10 kt. Seas 1 foot or less. .TUE...SW winds 5 to 10 kt with gusts up to 20 kt. Seas around 2 ft. .TUE NIGHT...S winds 5 to 10 kt. Seas around 2 ft. A chance of rain. .WED...SE winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 3 ft. Rain likely. .WED NIGHT...SE winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. Rain likely. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ254-211415- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm- 957 PM EDT Fri Apr 20 2018 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 AM EDT SATURDAY... .OVERNIGHT...NW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. .SAT...NW winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt in the afternoon. Seas 2 to 4 ft. .SAT NIGHT...SW winds around 5 kt, becoming NW after midnight. Seas around 2 ft. .SUN...NW winds 5 to 10 kt. Seas 2 to 3 ft. .SUN NIGHT...W winds 5 to 10 kt. Seas around 2 ft. .MON...N winds 5 to 10 kt, becoming NE in the afternoon. Seas around 2 ft. .MON NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. .TUE...SW winds 5 to 10 kt with gusts up to 20 kt. Seas 2 to 3 ft. .TUE NIGHT...S winds 10 to 15 kt. Seas 2 to 3 ft. A chance of rain. .WED...SE winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. Rain likely. .WED NIGHT...SE winds 15 to 20 kt with gusts up to 30 kt. Seas 5 to 8 ft. Rain 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. $$ ANZ255-211415- Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket- 957 PM EDT Fri Apr 20 2018 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 AM EDT SATURDAY... .OVERNIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. .SAT...W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. .SAT NIGHT...W winds 10 to 15 kt, becoming NW 5 to 10 kt after midnight. Seas 2 to 3 ft. .SUN...NW winds 5 to 10 kt, becoming W in the afternoon. Seas around 2 ft. .SUN NIGHT...W winds 5 to 10 kt. Seas around 2 ft. .MON...N winds 5 to 10 kt, becoming SE in the afternoon. Seas around 2 ft. .MON NIGHT...S winds 5 to 10 kt. Seas around 2 ft. .TUE...S winds 5 to 10 kt. Seas around 2 ft. .TUE NIGHT...SE winds 10 to 15 kt. Seas 2 to 3 ft. A chance of rain. .WED...SE winds 15 to 20 kt with gusts up to 30 kt. Seas 4 to 7 ft. Rain likely. .WED NIGHT...SE winds 15 to 20 kt with gusts up to 25 kt. Seas 7 to 10 ft. A chance of rain. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ256-211415- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island- 957 PM EDT Fri Apr 20 2018 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 AM EDT SATURDAY... .OVERNIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. .SAT...W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. .SAT NIGHT...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 3 ft. A chance of rain. .WED...SE winds 15 to 20 kt with gusts up to 30 kt. Seas 5 to 8 ft. Rain likely. .WED NIGHT...SE winds 10 to 15 kt with gusts up to 25 kt. Seas 9 to 12 ft. Rain 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. $$ ANZ232-211415- Nantucket Sound- 957 PM EDT Fri Apr 20 2018 .OVERNIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. .SAT...NW winds 10 to 15 kt with gusts up to 20 kt, becoming W 5 to 10 kt in the afternoon. Seas around 2 ft. .SAT NIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Seas around 2 ft. .SUN...NW winds 5 to 10 kt, becoming SW in the afternoon. Seas 1 foot or less. .SUN NIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Seas 1 foot or less. .MON...N winds around 5 kt, becoming SE in the afternoon. Seas 1 foot or less. .MON NIGHT...SW winds 5 to 10 kt. Seas 1 foot or less. .TUE...S winds 5 to 10 kt. Seas around 2 ft. .TUE NIGHT...S winds 10 to 15 kt. Seas around 2 ft. A chance of rain. .WED...SE winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. Rain likely. .WED NIGHT...SE winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. Rain likely. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ233-211415- Vineyard Sound- 957 PM EDT Fri Apr 20 2018 .OVERNIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. .SAT...NW winds around 10 kt with gusts up to 20 kt, becoming W in the afternoon. Seas around 2 ft. .SAT NIGHT...W winds 5 to 10 kt, becoming NW 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 5 to 10 kt, becoming S in the afternoon. Seas 1 foot or less. .MON NIGHT...SW 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 10 to 15 kt. Seas around 2 ft. A chance of rain. .WED...SE winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. Rain likely. .WED NIGHT...SE winds 10 to 15 kt with gusts up to 25 kt. Seas 4 to 6 ft. Rain 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. $$ ANZ234-211415- Buzzards Bay- 957 PM EDT Fri Apr 20 2018 .OVERNIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. .SAT...NW winds around 10 kt with gusts up to 20 kt, becoming W in the afternoon. Seas around 2 ft. .SAT NIGHT...W winds 5 to 10 kt, becoming NW after midnight. Seas 1 foot or less. .SUN...NW winds 5 to 10 kt, becoming SW in the afternoon. Seas 1 foot or less. .SUN NIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Seas 1 foot or less. .MON...N winds around 5 kt, becoming S in the afternoon. Seas 1 foot or less. .MON NIGHT...SW winds 5 to 10 kt. Seas 1 foot or less. .TUE...S winds 5 to 10 kt with gusts up to 20 kt. Seas 1 foot or less. .TUE NIGHT...S winds 5 to 10 kt. Seas 1 foot or less. A chance of rain. .WED...SE winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. Rain likely. .WED NIGHT...SE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Rain likely. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ235-211415- Rhode Island Sound- 957 PM EDT Fri Apr 20 2018 .OVERNIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. .SAT...NW winds 10 to 15 kt with gusts up to 20 kt, becoming W in the afternoon. Seas 2 to 3 ft. .SAT NIGHT...W winds 5 to 10 kt, becoming N after midnight. Seas around 2 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 S in the afternoon. Seas around 2 ft. .MON NIGHT...SW 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 around 2 ft. A chance of rain. .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 25 kt. Seas 5 to 8 ft. Rain 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. $$ ANZ237-211415- Block Island Sound- 957 PM EDT Fri Apr 20 2018 .OVERNIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. .SAT...NW winds 10 to 15 kt with gusts up to 20 kt, becoming W in the afternoon. Seas around 2 ft. .SAT NIGHT...W winds 5 to 10 kt, becoming N after midnight. Seas around 2 ft. .SUN...NW winds around 5 kt, becoming SW 10 to 15 kt in the afternoon. Seas around 2 ft. .SUN NIGHT...W winds 10 to 15 kt, becoming NW 5 to 10 kt after midnight. Seas around 2 ft. .MON...N winds 5 to 10 kt, becoming S in the afternoon. Seas 1 foot or less. .MON NIGHT...S winds 5 to 10 kt. Seas around 2 ft. .TUE...S winds 5 to 10 kt. Seas around 2 ft. .TUE NIGHT...SE winds 10 to 15 kt. Seas around 2 ft. Rain likely. .WED...SE winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 6 ft. Rain likely. .WED NIGHT...SE winds 10 to 15 kt with gusts up to 25 kt. Seas 5 to 8 ft. Rain likely. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ230-211415- Boston Harbor- 957 PM EDT Fri Apr 20 2018 .OVERNIGHT...NW winds 10 to 15 kt with gusts up to 25 kt. Waves around 2 ft. .SAT...NW winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt in the afternoon. Waves around 2 ft. .SAT NIGHT...NW winds 5 to 10 kt. Waves 1 foot or less. .SUN...NW winds 5 to 10 kt, becoming W in the afternoon. Waves 1 foot or less. .SUN NIGHT...NW winds around 5 kt. Waves 1 foot or less. .MON...NW winds around 5 kt, becoming SE in the afternoon. Waves 1 foot or less. .MON NIGHT...SW 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. A chance of rain. .WED...SE winds 5 to 10 kt. Waves around 2 ft. Rain likely. .WED NIGHT...E winds 5 to 10 kt. Waves around 2 ft. Rain 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. $$ ANZ236-211415- Narragansett Bay- 957 PM EDT Fri Apr 20 2018 .OVERNIGHT...NW winds 5 to 10 kt with gusts up to 25 kt. Waves around 2 ft. .SAT...NW winds 5 to 10 kt. Gusts up to 20 kt in the morning. Waves 1 foot or less. .SAT NIGHT...NW winds 5 to 10 kt. Waves 1 foot or less. .SUN...NW winds around 5 kt, becoming W in the afternoon. Waves 1 foot or less. .SUN NIGHT...W winds 5 to 10 kt, becoming NW after midnight. Waves around 2 ft. .MON...N winds around 5 kt, becoming S in the afternoon. Waves 1 foot or less. .MON NIGHT...SW winds 5 to 10 kt. Waves 1 foot or less. .TUE...S winds 5 to 10 kt. Waves around 2 ft. .TUE NIGHT...S winds 5 to 10 kt. Waves around 2 ft. A chance of rain. .WED...SE winds 10 to 15 kt with gusts up to 20 kt. Waves 2 to 4 ft. Rain likely. .WED NIGHT...SE winds 5 to 10 kt with gusts up to 20 kt. Waves 2 to 4 ft. Rain likely. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ 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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