Coastal Waters Forecast
Issued by NWS Boston, MA

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000 FZUS51 KBOX 201421 CWFBOX Coastal Waters Forecast National Weather Service Taunton MA 1021 AM EDT Sun Aug 20 2017 COASTAL WATERS FROM THE MERRIMACK RIVER MA TO WATCH HILL RI OUT TO 25 NM ANZ200-210315- 1021 AM EDT Sun Aug 20 2017 .Synopsis for Massachusetts and Rhode Island coastal waters... High pres will build over the waters today through Mon. The high will move offshore Tue, allowing a cold front to approach Wed. Large high pres will begin to build over the region Thu. 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. $$ ANZ250-210315- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 1021 AM EDT Sun Aug 20 2017 .THIS AFTERNOON...W winds 5 to 10 kt. Seas around 2 ft. Patchy fog. Vsby 1 to 3 NM. .TONIGHT...W winds 5 to 10 kt. Seas around 2 ft. .MON...W winds around 5 kt, becoming S in the afternoon. Seas around 2 ft. .MON NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. .TUE...SW winds 5 to 10 kt, becoming S 15 to 20 kt in the afternoon. Seas 2 to 4 ft. .TUE NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. A chance of showers and tstms. .WED...SW winds 15 to 20 kt. Seas 2 to 4 ft. A chance of showers and tstms. Some tstms may produce gusty winds, and heavy rainfall. .WED NIGHT...W winds 10 to 15 kt. Seas 2 to 3 ft. .THU...N winds 5 to 10 kt. Seas 2 to 3 ft. .THU NIGHT...W winds 5 to 10 kt. Seas around 2 ft. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ251-210315- Massachusetts Bay and Ipswich Bay- 1021 AM EDT Sun Aug 20 2017 .THIS AFTERNOON...W winds 5 to 10 kt. Seas 1 to 2 ft. .TONIGHT...W winds around 5 kt. Seas 1 foot or less. .MON...W winds around 5 kt, becoming S in the afternoon. Seas 1 to 2 ft. .MON NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. .TUE...SW winds 5 to 10 kt, becoming S 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas around 2 ft. .TUE NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. A chance of showers and tstms. .WED...SW winds 10 to 15 kt. Seas around 2 ft. Showers likely with a chance of tstms. Some tstms may produce gusty winds, and heavy rainfall. .WED NIGHT...W winds 5 to 10 kt. Seas 1 foot or less. .THU...N winds 5 to 10 kt. Seas 1 foot or less. .THU NIGHT...W winds 5 to 10 kt. Seas 1 foot or less. Winds and seas higher in and near tstms. 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. $$ ANZ231-210315- Cape Cod Bay- 1021 AM EDT Sun Aug 20 2017 .THIS AFTERNOON...W winds 5 to 10 kt. Seas 1 to 2 ft. .TONIGHT...SW winds 5 to 10 kt, becoming W after midnight. Seas 1 foot or less. .MON...W winds around 5 kt, becoming SW 10 to 15 kt in the afternoon. Seas around 2 ft. .MON NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt after midnight. Seas 1 to 2 ft. .TUE...SW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas around 2 ft. .TUE NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. A chance of showers and tstms. .WED...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. A chance of showers and tstms. Some tstms may produce gusty winds, and heavy rainfall. .WED NIGHT...W winds 5 to 10 kt. Seas 1 foot or less. .THU...N winds 5 to 10 kt. Seas 1 foot or less. .THU NIGHT...W winds 5 to 10 kt. Seas 1 foot or less. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ254-210315- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm- 1021 AM EDT Sun Aug 20 2017 .THIS AFTERNOON...W winds 5 to 10 kt. Seas 2 to 3 ft. .TONIGHT...W winds 5 to 10 kt. Seas 2 to 3 ft. .MON...SW winds 5 to 10 kt. Seas around 2 ft. .MON NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. .TUE...SW 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...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. A chance of showers and tstms. .WED...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. A chance of showers and tstms. Some tstms may produce gusty winds, and heavy rainfall. .WED NIGHT...W winds 10 to 15 kt. Seas 2 to 4 ft. A chance of showers. .THU...N winds 5 to 10 kt. Seas 2 to 3 ft. .THU NIGHT...W winds 5 to 10 kt. Seas around 2 ft. Winds and seas higher in and near tstms. 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. $$ ANZ255-210315- Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket- 1021 AM EDT Sun Aug 20 2017 .THIS AFTERNOON...W winds around 10 kt. Gusts up to 20 kt. Seas around 3 ft. .TONIGHT...W winds 5 to 10 kt. Gusts up to 20 kt in the evening. Seas 2 to 3 ft. .MON...W winds 5 to 10 kt. Gusts up to 20 kt in the afternoon. Seas around 2 ft. .MON NIGHT...SW winds 5 to 10 kt. Gusts up to 20 kt in the evening. Seas 2 to 3 ft. .TUE...SW winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. .TUE NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 6 ft. A chance of showers and tstms. .WED...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 6 ft. A chance of showers and tstms. Some tstms may produce gusty winds, and heavy rainfall. .WED NIGHT...W winds 10 to 15 kt. Seas 2 to 4 ft. A chance of showers. .THU...N winds 5 to 10 kt. Seas 2 to 3 ft. .THU NIGHT...W winds 5 to 10 kt. Seas around 2 ft. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ256-210315- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island- 1021 AM EDT Sun Aug 20 2017 .THIS AFTERNOON...W winds around 10 kt. Seas around 3 ft. .TONIGHT...W winds 5 to 10 kt. Seas 2 to 3 ft. .MON...W winds 5 to 10 kt. Seas 2 to 3 ft. .MON NIGHT...SW winds around 10 kt. Seas around 3 ft. .TUE...SW winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Seas 2 to 4 ft. .TUE NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 7 ft. A chance of showers and tstms. .WED...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 6 ft. A chance of showers and tstms. Some tstms may produce gusty winds, and heavy rainfall. .WED NIGHT...NW winds 10 to 15 kt. Seas 2 to 4 ft. .THU...NW winds 5 to 10 kt. Seas 2 to 3 ft. .THU NIGHT...W winds 5 to 10 kt. Seas around 2 ft. Winds and seas higher in and near tstms. 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. $$ ANZ232-210315- Nantucket Sound- 1021 AM EDT Sun Aug 20 2017 .THIS AFTERNOON...W winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. .TONIGHT...W winds 10 to 15 kt with gusts up to 20 kt, becoming NW around 5 kt after midnight. Seas around 2 ft. .MON...W winds around 5 kt, becoming SW 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. .MON NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt after midnight. Seas 2 to 3 ft. .TUE...SW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas around 2 ft. .TUE NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. A chance of showers and tstms. .WED...SW winds 15 to 20 kt. Seas 2 to 4 ft. A chance of showers and tstms. Some tstms may produce gusty winds, and heavy rainfall. .WED NIGHT...W winds 10 to 15 kt. Seas around 2 ft. A chance of showers. .THU...N winds 5 to 10 kt. Seas 1 foot or less. .THU NIGHT...W winds 5 to 10 kt. Seas 1 foot or less. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ233-210315- Vineyard Sound- 1021 AM EDT Sun Aug 20 2017 .THIS AFTERNOON...W winds 10 to 15 kt. Gusts up to 20 kt. Seas 2 to 3 ft. .TONIGHT...W winds 10 to 15 kt with gusts up to 20 kt, becoming NW around 5 kt after midnight. Seas 2 to 3 ft. .MON...W winds around 5 kt, becoming SW 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. .MON NIGHT...SW 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...SW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas around 2 ft. .TUE NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. A chance of showers and tstms. .WED...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. A chance of showers and tstms. Some tstms may produce gusty winds, and heavy rainfall. .WED NIGHT...W winds around 10 kt. Seas around 2 ft. A chance of showers. .THU...W winds 5 to 10 kt. Seas 1 foot or less. .THU NIGHT...W winds 5 to 10 kt. Seas 1 foot or less. Winds and seas higher in and near tstms. 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. $$ ANZ234-210315- Buzzards Bay- 1021 AM EDT Sun Aug 20 2017 .THIS AFTERNOON...W winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. .TONIGHT...W winds 10 to 15 kt, diminishing to around 5 kt after midnight. Seas 2 to 3 ft. .MON...W winds around 5 kt, becoming SW 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. .MON NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt after midnight. Seas 2 to 3 ft. .TUE...SW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas around 2 ft. .TUE NIGHT...SW winds 10 to 15 kt, increasing to 15 to 20 kt after midnight. Gusts up to 25 kt. Seas 2 to 4 ft. A chance of showers and tstms. .WED...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. A chance of showers and tstms. Some tstms may produce gusty winds, and heavy rainfall. .WED NIGHT...W winds 5 to 10 kt. Seas 1 foot or less. .THU...W winds 5 to 10 kt. Seas 1 foot or less. .THU NIGHT...W winds 5 to 10 kt. Seas 1 foot or less. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ235-210315- Rhode Island Sound- 1021 AM EDT Sun Aug 20 2017 .THIS AFTERNOON...W winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. .TONIGHT...W winds 10 to 15 kt, becoming NW 5 to 10 kt after midnight. Seas 2 to 3 ft. .MON...W winds around 5 kt, becoming SW 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. .MON NIGHT...SW 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...SW 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...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. A chance of showers and tstms. .WED...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. A chance of showers and tstms. Some tstms may produce gusty winds, and heavy rainfall. .WED NIGHT...NW winds 5 to 10 kt. Seas 2 to 4 ft. .THU...W winds 5 to 10 kt. Seas around 2 ft. .THU NIGHT...W winds 5 to 10 kt. Seas around 2 ft. Winds and seas higher in and near tstms. 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. $$ ANZ237-210315- Block Island Sound- 1021 AM EDT Sun Aug 20 2017 .THIS AFTERNOON...W winds 10 to 15 kt. Gusts up to 20 kt. Seas 2 to 3 ft. .TONIGHT...W winds 10 to 15 kt, becoming NW around 5 kt after midnight. Seas 2 to 3 ft. .MON...W winds around 5 kt, becoming SW 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. .MON NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt after midnight. Seas 2 to 3 ft. .TUE...SW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 2 to 4 ft. .TUE NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. A chance of showers and tstms. .WED...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. A chance of showers and tstms. Some tstms may produce gusty winds, and heavy rainfall. .WED NIGHT...NW winds 5 to 10 kt. Seas 2 to 3 ft. .THU...W winds 5 to 10 kt. Seas around 2 ft. .THU NIGHT...NW winds 5 to 10 kt. Seas around 2 ft. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ230-210315- Boston Harbor- 1021 AM EDT Sun Aug 20 2017 .THIS AFTERNOON...W winds 5 to 10 kt. Waves 1 foot or less. .TONIGHT...W winds 5 to 10 kt. Waves 1 foot or less. .MON...SW winds around 5 kt. Waves 1 foot or less. .MON NIGHT...SW winds around 5 kt. Waves 1 foot or less. .TUE...SW winds 5 to 10 kt. Gusts up to 20 kt in the afternoon. Waves 1 foot or less. .TUE NIGHT...SW winds around 10 kt. Gusts up to 20 kt in the evening. Waves 1 foot or less. A chance of showers and tstms. .WED...SW winds 5 to 10 kt. Waves 1 foot or less. Showers likely with a chance of tstms. Some tstms may produce gusty winds, and heavy rainfall. .WED NIGHT...W winds around 5 kt. Waves 1 foot or less. .THU...NW winds around 5 kt. Waves 1 foot or less. .THU NIGHT...NW winds around 5 kt. Waves 1 foot or less. Winds and waves higher in and near tstms. 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. $$ ANZ236-210315- Narragansett Bay- 1021 AM EDT Sun Aug 20 2017 .THIS AFTERNOON...NW winds 5 to 10 kt, becoming W 10 to 15 kt with gusts up to 20 kt. Waves around 2 ft. .TONIGHT...W winds 10 to 15 kt, becoming NW around 5 kt after midnight. Waves around 2 ft. .MON...W winds around 5 kt, becoming SW 10 to 15 kt with gusts up to 20 kt in the afternoon. Waves 2 to 3 ft. .MON NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt, diminishing to around 5 kt after midnight. Waves 2 to 3 ft. .TUE...SW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Waves around 2 ft. .TUE NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Waves 2 to 3 ft. A chance of showers and tstms. .WED...SW winds 5 to 10 kt. Waves around 2 ft. A chance of showers and tstms. Some tstms may produce gusty winds, and heavy rainfall. .WED NIGHT...NW winds 5 to 10 kt. Waves around 2 ft. .THU...NW winds around 5 kt. Waves 1 foot or less. .THU NIGHT...NW winds around 5 kt. Waves 1 foot or less. Winds and waves higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ 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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