Coastal Waters Forecast
Issued by NWS Boston, MA

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981 FZUS51 KBOX 222316 CWFBOX Coastal Waters Forecast National Weather Service Boston/Norton MA 716 PM EDT Sun Apr 22 2018 Coastal waters from the Merrimack River MA to Watch Hill RI out to 25 NM ANZ200-231200- 716 PM EDT Sun Apr 22 2018 .Synopsis for Massachusetts and Rhode Island coastal waters... High pressure remains over the waters through Monday, then shifts the the east on Tuesday. Low pressure will move north along the eastern seaboard Tuesday night and Wednesday, lifting over the waters early Thursday. Another storm will be moving up along the coast late Friday. 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. $$ ANZ250-231200- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 716 PM EDT Sun Apr 22 2018 .TONIGHT...S winds 5 to 10 kt, becoming NW after midnight. Seas around 2 ft. .MON...N winds around 5 kt, becoming SE in the afternoon. Seas around 2 ft. .MON NIGHT...S winds 5 to 10 kt. Seas around 2 ft. .TUE...S winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 2 to 4 ft. .TUE NIGHT...S winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas 2 to 4 ft. A chance of rain. .WED...SE winds 10 to 15 kt, increasing to 15 to 20 kt in the afternoon. Gusts up to 25 kt. Seas 4 to 6 ft. Rain. .WED NIGHT...SE winds 15 to 20 kt, becoming S 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 5 to 8 ft. Rain likely. .THU...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 7 ft. .THU NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 7 ft. .FRI...S winds 10 to 15 kt. Seas 3 to 5 ft. A chance of showers. .FRI NIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 6 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ251-231200- Massachusetts Bay and Ipswich Bay- 716 PM EDT Sun Apr 22 2018 .TONIGHT...S winds 5 to 10 kt, becoming N after midnight. Seas around 2 ft. .MON...N winds around 5 kt, becoming SE with gusts up to 20 kt in the afternoon. Seas around 2 ft. .MON NIGHT...S winds 5 to 10 kt. Gusts up to 20 kt in the evening. Seas around 2 ft. .TUE...S winds 5 to 10 kt, increasing to 10 to 15 kt in the afternoon. Seas 2 to 3 ft. .TUE NIGHT...S winds 10 to 15 kt, diminishing to 5 to 10 kt after midnight. 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 4 ft. Rain. .WED NIGHT...SE winds 10 to 15 kt with gusts up to 20 kt, becoming S 5 to 10 kt after midnight. Seas 3 to 5 ft. Rain likely. .THU...SW winds 10 to 15 kt. Seas 3 to 5 ft. A chance of showers. .THU NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. .FRI...S winds 10 to 15 kt. Seas 2 to 4 ft. A chance of showers. .FRI NIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Seas 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. $$ ANZ231-231200- Cape Cod Bay- 716 PM EDT Sun Apr 22 2018 .TONIGHT...S winds 5 to 10 kt, becoming NW after midnight. Seas around 2 ft. .MON...N winds around 5 kt, becoming E with gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. .MON NIGHT...S winds 5 to 10 kt. Gusts up to 20 kt in the evening. Seas 2 to 3 ft. .TUE...S winds 5 to 10 kt. Seas around 2 ft. .TUE NIGHT...S winds 5 to 10 kt. Seas around 2 ft. A chance of rain. .WED...SE winds 10 to 15 kt, increasing to 15 to 20 kt in the afternoon. Gusts up to 25 kt. Seas 2 to 3 ft. Rain. Vsby 1 to 3 NM. .WED NIGHT...SE winds 15 to 20 kt, becoming S 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 2 to 3 ft. Rain likely. .THU...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. .THU NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. .FRI...S winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers. .FRI NIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ254-231200- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm- 716 PM EDT Sun Apr 22 2018 .TONIGHT...SW winds 5 to 10 kt, becoming W after midnight. Seas around 2 ft. .MON...N winds around 5 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...SE winds 10 to 15 kt. Seas 2 to 4 ft. A chance of rain. .WED...SE winds 15 to 20 kt with gusts up to 30 kt. Seas 5 to 8 ft. Rain. Vsby 1 NM or less. .WED NIGHT...SE winds 15 to 20 kt, becoming S 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 7 to 10 ft. Rain likely. .THU...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 6 to 9 ft. .THU NIGHT...SW winds 10 to 15 kt with gusts up to 25 kt. Seas 4 to 7 ft. .FRI...S winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 6 ft. .FRI NIGHT...S 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. $$ ANZ255-231200- Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket- 716 PM EDT Sun Apr 22 2018 .TONIGHT...SW winds 5 to 10 kt with gusts up to 20 kt, becoming W after midnight. Seas around 2 ft. .MON...N winds around 5 kt, becoming E with gusts up to 20 kt in the afternoon. Seas around 2 ft. .MON NIGHT...S winds 5 to 10 kt. Gusts up to 20 kt in the evening. Seas around 2 ft. .TUE...S winds 5 to 10 kt. Seas around 2 ft. .TUE NIGHT...SE winds 10 to 15 kt. Gusts up to 20 kt after midnight. Seas 3 to 5 ft. A chance of rain. .WED...SE winds 15 to 20 kt, increasing to 20 to 25 kt in the afternoon. Gusts up to 30 kt. Seas 6 to 9 ft. Rain. Vsby 1 NM or less. .WED NIGHT...S winds 15 to 20 kt, becoming SW 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 8 to 11 ft. Rain likely. .THU...SW winds 15 to 20 kt. Seas 6 to 9 ft. .THU NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 7 ft. .FRI...S winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 6 ft. .FRI NIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 6 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ256-231200- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island- 716 PM EDT Sun Apr 22 2018 .TONIGHT...SW winds 10 to 15 kt with gusts up to 20 kt, becoming W 5 to 10 kt after midnight. Seas around 2 ft. .MON...N winds around 5 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. Gusts up to 20 kt after midnight. Seas 3 to 5 ft. A chance of rain. .WED...SE winds 15 to 20 kt with gusts up to 25 kt. Seas 7 to 10 ft. Rain. Vsby 1 NM or less. .WED NIGHT...S winds 15 to 20 kt, becoming SW 10 to 15 kt after midnight. Seas 9 to 12 ft. Rain likely. .THU...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 6 to 9 ft. .THU NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 7 ft. .FRI...S winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 6 ft. A chance of showers. .FRI NIGHT...S winds 10 to 15 kt with gusts up to 20 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. $$ ANZ232-231200- Nantucket Sound- 716 PM EDT Sun Apr 22 2018 .TONIGHT...SW winds 5 to 10 kt, becoming W after midnight. Seas around 2 ft. .MON...N winds around 5 kt, becoming E with gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. .MON NIGHT...S winds 5 to 10 kt. Gusts up to 20 kt in the evening. Seas 2 to 3 ft. .TUE...S winds 5 to 10 kt. Seas around 2 ft. .TUE NIGHT...SE winds 10 to 15 kt. Seas 2 to 3 ft. A chance of rain. .WED...SE winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. Rain. Vsby 1 to 3 NM. .WED NIGHT...S winds 15 to 20 kt, becoming SW 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 3 to 5 ft. Rain likely. .THU...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. .THU NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. .FRI...S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. A chance of showers. .FRI NIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ233-231200- Vineyard Sound- 716 PM EDT Sun Apr 22 2018 .TONIGHT...SW winds 5 to 10 kt with gusts up to 20 kt, becoming NW after midnight. Seas around 2 ft. .MON...N winds around 5 kt, becoming SE 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. .MON NIGHT...S winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt after midnight. Seas 2 to 3 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 25 kt. Seas 2 to 4 ft. Rain. Vsby 1 NM or less. .WED NIGHT...S winds 15 to 20 kt, becoming SW 10 to 15 kt after midnight. Seas 2 to 4 ft. Rain likely. .THU...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. .THU NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. .FRI...S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. A chance of showers. .FRI NIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Seas 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. $$ ANZ234-231200- Buzzards Bay- 716 PM EDT Sun Apr 22 2018 .TONIGHT...SW winds 5 to 10 kt with gusts up to 20 kt, becoming NW after midnight. Seas around 2 ft. .MON...N winds around 5 kt, becoming SE 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. .MON NIGHT...S winds 10 to 15 kt with gusts up to 20 kt, diminishing to around 5 kt after midnight. Seas 2 to 3 ft. .TUE...S winds 5 to 10 kt. Seas around 2 ft. .TUE NIGHT...S winds 5 to 10 kt, becoming SE 10 to 15 kt after midnight. Seas around 2 ft. A chance of rain. .WED...SE winds 10 to 15 kt, increasing to 15 to 20 kt in the afternoon. Gusts up to 25 kt. Seas 2 to 4 ft. Rain. Vsby 1 to 3 NM. .WED NIGHT...S winds 10 to 15 kt with gusts up to 20 kt, becoming SW 5 to 10 kt after midnight. Seas 2 to 4 ft. Rain likely. .THU...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. .THU NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. .FRI...S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. A chance of showers. .FRI NIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ235-231200- Rhode Island Sound- 716 PM EDT Sun Apr 22 2018 .TONIGHT...SW winds 5 to 10 kt with gusts up to 20 kt, becoming NW after midnight. Seas around 2 ft. .MON...N winds around 5 kt, becoming SE 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. .MON NIGHT...S winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt after midnight. Seas 2 to 3 ft. .TUE...S winds 5 to 10 kt. Seas around 2 ft. .TUE NIGHT...SE winds 10 to 15 kt. Gusts up to 20 kt after midnight. Seas 3 to 5 ft. A chance of rain. .WED...SE winds 15 to 20 kt with gusts up to 25 kt. Seas 5 to 8 ft. Rain. Vsby 1 NM or less. .WED NIGHT...S winds 15 to 20 kt, becoming SW 10 to 15 kt after midnight. Seas 7 to 10 ft. Rain likely. .THU...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 5 to 8 ft. .THU NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 7 ft. .FRI...S winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. A chance of showers. .FRI NIGHT...S winds 10 to 15 kt with gusts up to 25 kt. Seas 3 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. $$ ANZ237-231200- Block Island Sound- 716 PM EDT Sun Apr 22 2018 .TONIGHT...SW winds 10 to 15 kt with gusts up to 20 kt, becoming NW 5 to 10 kt after midnight. Seas around 2 ft. .MON...NE winds around 5 kt, becoming SE 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. .MON NIGHT...S winds 5 to 10 kt with gusts up to 20 kt, diminishing to around 5 kt after midnight. Seas 2 to 3 ft. .TUE...S winds 5 to 10 kt. Seas around 2 ft. .TUE NIGHT...SE winds 10 to 15 kt. Gusts up to 20 kt after midnight. Seas 2 to 4 ft. A chance of rain. .WED...SE winds 15 to 20 kt with gusts up to 25 kt. Seas 5 to 8 ft. Rain. Vsby 1 NM or less. .WED NIGHT...S winds 10 to 15 kt with gusts up to 20 kt, becoming SW after midnight. Seas 5 to 8 ft. Rain likely. .THU...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 7 ft. .THU NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 6 ft. .FRI...S winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. A chance of showers. .FRI NIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ230-231200- Boston Harbor- 716 PM EDT Sun Apr 22 2018 .TONIGHT...S winds 5 to 10 kt, becoming N 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...S 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, increasing to 10 to 15 kt in the afternoon. Waves 2 to 3 ft. Rain. .WED NIGHT...SE winds 5 to 10 kt, becoming SW after midnight. Waves 2 to 3 ft. Rain likely. .THU...W winds 5 to 10 kt. Waves around 2 ft. A chance of showers. .THU NIGHT...W winds 5 to 10 kt. Waves around 2 ft. .FRI...S winds 5 to 10 kt. Waves around 2 ft. A chance of showers. .FRI NIGHT...S winds 5 to 10 kt with gusts up to 20 kt. Waves around 2 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. $$ ANZ236-231200- Narragansett Bay- 716 PM EDT Sun Apr 22 2018 .TONIGHT...SW winds 5 to 10 kt with gusts up to 20 kt, becoming NW after midnight. Waves around 2 ft. .MON...N winds around 5 kt, becoming SE 10 to 15 kt with gusts up to 20 kt in the afternoon. Waves 2 to 3 ft. .MON NIGHT...S winds 5 to 10 kt. Gusts up to 20 kt in the evening. Waves 2 to 3 ft. .TUE...S winds around 5 kt, increasing to 5 to 10 kt in the afternoon. Waves around 2 ft. .TUE NIGHT...SE winds 5 to 10 kt. Waves 2 to 4 ft. A chance of rain. .WED...SE winds 10 to 15 kt with gusts up to 20 kt. Waves 3 to 5 ft. Rain. Vsby 1 NM or less. .WED NIGHT...SE winds 10 to 15 kt, becoming SW 5 to 10 kt after midnight. Waves 4 to 6 ft. Rain likely. .THU...W winds 10 to 15 kt with gusts up to 20 kt. Waves 3 to 5 ft. .THU NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Waves 2 to 4 ft. .FRI...S winds 5 to 10 kt. Waves 2 to 3 ft. A chance of showers. .FRI NIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Waves 2 to 3 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ 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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