Coastal Waters Forecast
Issued by NWS Boston, MA

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000 FZUS51 KBOX 211716 CWFBOX Coastal Waters Forecast National Weather Service Boston/Norton MA 116 PM EDT Mon May 21 2018 Coastal waters from the Merrimack River MA to Watch Hill RI out to 25 NM ANZ200-220600- 116 PM EDT Mon May 21 2018 .Synopsis for Massachusetts and Rhode Island coastal waters... High pres builds over the waters today, SE of the waters tonight, then head farther E Tue. A low pres approaches the waters from the SW late Tue, lifting NE Tue night. High pres builds E over New England Wed and Thu, then SE of the waters on Fri. 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. $$ ANZ250-220600- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 116 PM EDT Mon May 21 2018 .THIS AFTERNOON...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. .TONIGHT...SW winds 10 to 15 kt, diminishing to 5 to 10 kt after midnight. Seas 2 to 4 ft. .TUE...S winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers. .TUE NIGHT...S winds 5 to 10 kt. Gusts up to 20 kt in the evening. Seas 2 to 3 ft. Patchy fog. A chance of showers. Vsby 1 NM or less. .WED...NW winds 5 to 10 kt, becoming SW in the afternoon. Seas around 2 ft. Patchy fog. Vsby 1 NM or less. .WED NIGHT...W winds 5 to 10 kt, becoming N after midnight. Seas around 2 ft. .THU...E winds 5 to 10 kt. Seas 2 to 3 ft. .THU NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. .FRI...SW winds 10 to 15 kt. Seas 2 to 4 ft. .FRI NIGHT...SW winds 10 to 15 kt. Seas 2 to 4 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ251-220600- Massachusetts Bay and Ipswich Bay- 116 PM EDT Mon May 21 2018 .THIS AFTERNOON...SE winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. .TONIGHT...S winds 10 to 15 kt, becoming SW around 5 kt after midnight. Seas 2 to 3 ft. .TUE...SW winds around 5 kt, becoming S in the afternoon. Seas around 2 ft. A chance of showers. .TUE NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. Patchy fog. A chance of showers. Vsby 1 NM or less. .WED...NW winds around 5 kt, becoming SW in the afternoon. Seas 1 foot or less. Patchy fog. A chance of showers. Vsby 1 to 3 NM. .WED NIGHT...W winds 5 to 10 kt, becoming N after midnight. Seas 1 foot or less. .THU...E winds 5 to 10 kt. Seas around 2 ft. .THU NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. .FRI...W winds 5 to 10 kt. Seas around 2 ft. .FRI NIGHT...SW winds 5 to 10 kt. Seas 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. $$ ANZ231-220600- Cape Cod Bay- 116 PM EDT Mon May 21 2018 .THIS AFTERNOON...SE winds 5 to 10 kt. Seas 1 to 2 ft. .TONIGHT...SW winds 5 to 10 kt. Seas around 2 ft. .TUE...S winds 5 to 10 kt. Seas 1 foot or less. A chance of showers. .TUE NIGHT...S winds 5 to 10 kt. Gusts up to 20 kt in the evening. Seas 1 foot or less. Patchy fog. Showers. Vsby 1 NM or less. .WED...W winds around 5 kt. Seas 1 foot or less. Patchy fog. Vsby 1 NM or less. .WED NIGHT...SW winds 5 to 10 kt, becoming N after midnight. Seas 1 foot or less. .THU...NE winds 5 to 10 kt. Seas 1 foot or less. .THU NIGHT...SW winds 10 to 15 kt. Seas around 2 ft. .FRI...SW winds 10 to 15 kt. Seas around 2 ft. .FRI NIGHT...SW winds 10 to 15 kt. Seas around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ254-220600- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm- 116 PM EDT Mon May 21 2018 .THIS AFTERNOON...NE winds 5 to 10 kt. Seas 2 to 3 ft. .TONIGHT...SW winds 5 to 10 kt. Seas 2 to 4 ft. .TUE...S winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers. .TUE NIGHT...S winds 5 to 10 kt. Gusts up to 20 kt in the evening. Seas 2 to 3 ft. Patchy fog. Showers. Vsby 1 NM or less. .WED...W winds 5 to 10 kt. Seas 2 to 3 ft. Patchy fog. Vsby 1 NM or less. .WED NIGHT...W winds 5 to 10 kt, becoming N after midnight. Seas 2 to 3 ft. .THU...NE winds 5 to 10 kt. Seas 2 to 3 ft. .THU NIGHT...S winds 10 to 15 kt. Seas 2 to 4 ft. .FRI...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. .FRI NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 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. $$ ANZ255-220600- Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket- 116 PM EDT Mon May 21 2018 .THIS AFTERNOON...E winds 10 to 15 kt. Seas 3 to 4 ft. .TONIGHT...SW winds around 5 kt. Seas 3 to 4 ft. .TUE...S winds 5 to 10 kt. Seas around 3 ft. A chance of showers. .TUE NIGHT...SE winds 5 to 10 kt, becoming SW after midnight. Seas 2 to 3 ft. Patchy fog. Showers. Vsby 1 NM or less. .WED...W winds 5 to 10 kt. Seas 2 to 3 ft. Patchy fog. A chance of showers. Vsby 1 NM or less. .WED NIGHT...W winds 5 to 10 kt, becoming NW after midnight. Seas 2 to 4 ft. .THU...NE winds around 10 kt. Seas 2 to 4 ft. .THU NIGHT...S winds 10 to 15 kt. Seas 2 to 4 ft. .FRI...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. .FRI NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 5 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ256-220600- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island- 116 PM EDT Mon May 21 2018 .THIS AFTERNOON...S winds 5 to 10 kt. Seas around 4 ft. .TONIGHT...SW winds 5 to 10 kt. Seas 3 to 4 ft. .TUE...S winds 5 to 10 kt. Seas around 3 ft. Showers. .TUE NIGHT...SE winds 5 to 10 kt, becoming SW after midnight. Seas around 3 ft. Patchy fog. Showers. Vsby 1 NM or less. .WED...W winds 5 to 10 kt. Seas 2 to 3 ft. Patchy fog. Vsby 1 NM or less. .WED NIGHT...W winds around 10 kt, becoming NW after midnight. Seas 2 to 4 ft. .THU...NE winds 5 to 10 kt. Seas 2 to 4 ft. .THU NIGHT...S winds 10 to 15 kt. Seas 2 to 3 ft. .FRI...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. .FRI NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 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. $$ ANZ232-220600- Nantucket Sound- 116 PM EDT Mon May 21 2018 .THIS AFTERNOON...SE winds 5 to 10 kt. Seas around 2 ft. .TONIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. .TUE...S winds 5 to 10 kt. Seas 1 foot or less. A chance of showers. .TUE NIGHT...S winds 5 to 10 kt. Seas around 2 ft. Patchy fog. Showers. Vsby 1 NM or less. .WED...W winds 5 to 10 kt. Seas around 2 ft. Patchy fog. Vsby 1 NM or less. .WED NIGHT...SW winds 5 to 10 kt, becoming N after midnight. Seas around 2 ft. .THU...NE winds 5 to 10 kt. Seas around 2 ft. .THU NIGHT...S winds 10 to 15 kt. Seas 2 to 3 ft. .FRI...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. .FRI NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ233-220600- Vineyard Sound- 116 PM EDT Mon May 21 2018 .THIS AFTERNOON...S winds 5 to 10 kt. Seas around 2 ft. .TONIGHT...SW winds around 5 kt. Seas 2 to 3 ft. .TUE...S winds 5 to 10 kt. Seas around 2 ft. Showers likely. .TUE NIGHT...SE winds 5 to 10 kt, becoming SW after midnight. Seas around 2 ft. Patchy fog. Showers. Vsby 1 NM or less. .WED...W winds 5 to 10 kt. Seas around 2 ft. Patchy fog. Vsby 1 NM or less. .WED NIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Seas around 2 ft. .THU...NE winds 5 to 10 kt. Seas around 2 ft. .THU NIGHT...SW winds around 10 kt. Seas around 2 ft. .FRI...SW winds 10 to 15 kt. Seas 2 to 3 ft. .FRI NIGHT...SW winds 10 to 15 kt. Seas 2 to 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. $$ ANZ234-220600- Buzzards Bay- 116 PM EDT Mon May 21 2018 .THIS AFTERNOON...S winds 5 to 10 kt. Seas 2 to 3 ft. .TONIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. .TUE...S winds 5 to 10 kt. Seas 1 foot or less. Showers likely. .TUE NIGHT...SE winds 5 to 10 kt, becoming SW after midnight. Seas around 2 ft. Patchy fog. Showers. Vsby 1 NM or less. .WED...W winds 5 to 10 kt. Seas around 2 ft. Patchy fog. Vsby 1 NM or less. .WED NIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Seas around 2 ft. .THU...NE winds 5 to 10 kt. Seas around 2 ft. .THU NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. .FRI...SW winds 10 to 15 kt. Seas 2 to 3 ft. .FRI NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ235-220600- Rhode Island Sound- 116 PM EDT Mon May 21 2018 .THIS AFTERNOON...S winds 5 to 10 kt. Seas 2 to 4 ft. .TONIGHT...SW winds 5 to 10 kt. Seas around 3 ft. .TUE...S winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers. .TUE NIGHT...SE winds 5 to 10 kt with gusts up to 20 kt, becoming SW after midnight. Seas 2 to 3 ft. Patchy fog. Showers. Vsby 1 NM or less. .WED...W winds 5 to 10 kt. Seas around 2 ft. Patchy fog. Vsby 1 NM or less. .WED NIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Seas 2 to 3 ft. .THU...NE winds 5 to 10 kt. Seas 2 to 3 ft. .THU NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. .FRI...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. .FRI NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 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. $$ ANZ237-220600- Block Island Sound- 116 PM EDT Mon May 21 2018 .THIS AFTERNOON...S winds 5 to 10 kt. Seas 2 to 4 ft. .TONIGHT...SW winds 5 to 10 kt, diminishing to around 5 kt after midnight. Seas 2 to 3 ft. .TUE...SE winds around 5 kt. Seas 2 to 3 ft. Showers. .TUE NIGHT...SE winds 5 to 10 kt, becoming SW after midnight. Seas 2 to 3 ft. Patchy fog. Showers. Vsby 1 NM or less. .WED...W winds 5 to 10 kt. Seas around 2 ft. Patchy fog. Vsby 1 to 3 NM. .WED NIGHT...W winds 5 to 10 kt, becoming NW after midnight. Seas 2 to 3 ft. .THU...E winds 5 to 10 kt. Seas 2 to 3 ft. .THU NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. .FRI...SW winds 10 to 15 kt. Seas 2 to 4 ft. .FRI NIGHT...SW winds 10 to 15 kt. Seas 2 to 4 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ230-220600- Boston Harbor- 116 PM EDT Mon May 21 2018 .THIS AFTERNOON...SE winds 10 to 15 kt with gusts up to 20 kt. Waves 1 foot or less. .TONIGHT...SW winds 5 to 10 kt. Waves 1 foot or less. .TUE...SW winds around 5 kt, becoming S in the afternoon. Waves 1 foot or less. A chance of showers. .TUE NIGHT...S winds 5 to 10 kt. Waves 1 foot or less. Patchy fog. Showers likely. Vsby 1 NM or less. .WED...NW winds around 5 kt. Waves 1 foot or less. Patchy fog. A chance of showers. Vsby 1 to 3 NM. .WED NIGHT...W winds around 5 kt, becoming N after midnight. Waves 1 foot or less. .THU...NE winds around 5 kt. Waves 1 foot or less. .THU NIGHT...SW winds 5 to 10 kt. Waves 1 foot or less. .FRI...W winds 5 to 10 kt. Waves 1 foot or less. .FRI NIGHT...W winds around 5 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. $$ ANZ236-220600- Narragansett Bay- 116 PM EDT Mon May 21 2018 .THIS AFTERNOON...S winds 5 to 10 kt. Waves 2 to 3 ft. .TONIGHT...SW winds 5 to 10 kt, diminishing to around 5 kt after midnight. Waves 2 to 3 ft. .TUE...S winds around 5 kt, increasing to 5 to 10 kt in the afternoon. Waves around 2 ft. Showers. .TUE NIGHT...SE winds around 5 kt, becoming SW after midnight. Waves around 2 ft. Patchy fog. Showers. Vsby 1 NM or less. .WED...W winds 5 to 10 kt. Waves around 2 ft. Patchy fog. Vsby 1 to 3 NM. .WED NIGHT...W winds 5 to 10 kt, becoming NW after midnight. Waves around 2 ft. .THU...NE winds around 5 kt. Waves around 2 ft. .THU NIGHT...SW winds 5 to 10 kt. Waves around 2 ft. .FRI...SW winds 5 to 10 kt. Waves 2 to 3 ft. .FRI NIGHT...SW winds 5 to 10 kt. Waves 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ 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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