Coastal Waters Forecast
Issued by NWS Boston, MA

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239 FZUS51 KBOX 201116 CWFBOX Coastal Waters Forecast National Weather Service Boston/Norton MA 716 AM EDT Sat Jul 20 2019 Coastal waters from the Merrimack River MA to Watch Hill RI out to 25 NM ANZ200-210000- 716 AM EDT Sat Jul 20 2019 .Synopsis for Massachusetts and Rhode Island coastal waters... High heat and humidity will linger across the waters today and and Sunday. Scattered showers and thunderstorms may develop Sunday into Sunday evening as a frontal boundary meanders across the waters, then becomes stationary near the south coast. A weak wave of low pres moves along the front Mon into Tue, bringing showers and thunderstorms. Dry conditions return on Wed. 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. $$ ANZ250-210000- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 716 AM EDT Sat Jul 20 2019 .TODAY...W winds 5 to 10 kt, becoming S this afternoon. Seas 2 to 3 ft. .TONIGHT...SW winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt after midnight. Seas 2 to 3 ft. .SUN...SW winds 5 to 10 kt. Seas 2 to 3 ft. .SUN NIGHT...W winds 5 to 10 kt, becoming NW after midnight. Seas 2 to 3 ft. .MON...N winds 5 to 10 kt, becoming E in the afternoon. Seas around 2 ft. A chance of showers. .MON NIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft. Showers likely with a chance of tstms. Vsby 1 to 3 NM. .TUE...NW winds 5 to 10 kt. Seas 2 to 3 ft. Showers likely with a chance of tstms. Vsby 1 to 3 NM. .TUE NIGHT...NW winds around 5 kt. Seas 2 to 3 ft. Patchy fog. A chance of showers. Vsby 1 to 3 NM. .WED...SW winds around 5 kt. Seas 2 to 3 ft. .WED NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ251-210000- Massachusetts Bay and Ipswich Bay- 716 AM EDT Sat Jul 20 2019 .TODAY...W winds 5 to 10 kt, becoming S this afternoon. Seas 1 foot or less. .TONIGHT...SW winds 5 to 10 kt. Seas 1 foot or less. .SUN...SW winds 5 to 10 kt. Seas 1 foot or less. Scattered showers and tstms. .SUN NIGHT...NW winds around 5 kt. Seas 1 foot or less. Scattered showers and tstms. .MON...N winds around 5 kt, becoming E in the afternoon. Seas 1 foot or less. A chance of showers. .MON NIGHT...E winds 5 to 10 kt. Seas around 2 ft. Patchy fog. Showers likely with a chance of tstms. Vsby 1 to 3 NM. .TUE...N winds around 5 kt. Seas around 2 ft. Showers likely with a chance of tstms. Vsby 1 to 3 NM. .TUE NIGHT...N winds around 5 kt. Seas 1 foot or less. Patchy fog. A chance of showers. Vsby 1 to 3 NM. .WED...SW winds around 5 kt. Seas 1 foot or less. .WED NIGHT...SW winds around 5 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. $$ ANZ231-210000- Cape Cod Bay- 716 AM EDT Sat Jul 20 2019 .TODAY...SW winds 5 to 10 kt. Seas 1 foot or less. Patchy fog this morning with vsby 1 to 3 NM. .TONIGHT...SW winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt after midnight. Seas 1 foot or less. .SUN...SW winds 5 to 10 kt. Seas 1 foot or less. .SUN NIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Seas around 2 ft. Scattered showers and tstms. Vsby 1 NM or less. .MON...N winds 5 to 10 kt, becoming E in the afternoon. Seas 1 foot or less. A chance of showers. .MON NIGHT...S winds 5 to 10 kt. Seas 1 foot or less. Showers likely with a chance of tstms. Vsby 1 to 3 NM. .TUE...W winds 5 to 10 kt. Seas 1 foot or less. Showers likely with a chance of tstms. Vsby 1 to 3 NM. .TUE NIGHT...N winds around 5 kt. Seas 1 foot or less. Patchy fog. A chance of showers. Vsby 1 to 3 NM. .WED...SE winds around 5 kt. Seas 1 foot or less. .WED NIGHT...W winds around 5 kt. Seas around 2 ft. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ254-210000- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm- 716 AM EDT Sat Jul 20 2019 .TODAY...SW winds 5 to 10 kt. Seas 2 to 4 ft. Patchy fog this morning with vsby 1 NM or less. .TONIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Patchy fog. Vsby 1 NM or less. .SUN...SW winds 5 to 10 kt. Gusts up to 20 kt in the afternoon. Seas 2 to 4 ft. .SUN NIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Seas 2 to 4 ft. Scattered showers and tstms. Vsby 1 NM or less. .MON...N winds 5 to 10 kt, becoming E in the afternoon. Seas 2 to 3 ft. A chance of showers. .MON NIGHT...S winds 5 to 10 kt. Gusts up to 20 kt after midnight. Seas 2 to 4 ft. Showers likely with a chance of tstms. .TUE...W winds 5 to 10 kt with gusts up to 20 kt. Seas 3 to 5 ft. Showers likely with a chance of tstms. .TUE NIGHT...NW winds 5 to 10 kt. Seas 3 to 5 ft. Patchy fog. A chance of showers. Vsby 1 to 3 NM. .WED...SE winds around 5 kt. Seas 2 to 4 ft. .WED NIGHT...SW winds around 5 kt. Seas 2 to 4 ft. Patchy fog. Vsby 1 to 3 NM. 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. $$ ANZ255-210000- Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket- 716 AM EDT Sat Jul 20 2019 .TODAY...SW winds 10 to 15 kt. Gusts up to 20 kt this afternoon. Seas 2 to 4 ft. Patchy fog this morning with vsby 1 to 3 NM. .TONIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Patchy fog. Vsby 1 NM or less. .SUN...SW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 2 to 4 ft. .SUN NIGHT...W winds 5 to 10 kt. Gusts up to 20 kt in the evening. Seas 2 to 4 ft. .MON...N winds around 5 kt, becoming E in the afternoon. Seas 2 to 3 ft. A chance of showers. .MON NIGHT...S winds 5 to 10 kt. Gusts up to 20 kt after midnight. Seas 3 to 5 ft. Showers likely with a chance of tstms. .TUE...SW winds around 10 kt with gusts up to 20 kt. Seas 4 to 7 ft. Showers likely with a chance of tstms. .TUE NIGHT...NW winds 5 to 10 kt. Seas 4 to 6 ft. Patchy fog. A chance of showers. Vsby 1 to 3 NM. .WED...SE winds around 5 kt. Seas 3 to 5 ft. .WED NIGHT...SW winds around 5 kt. Seas 2 to 4 ft. Patchy fog. Vsby 1 to 3 NM. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ256-210000- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island- 716 AM EDT Sat Jul 20 2019 .TODAY...W winds 5 to 10 kt, becoming SW 10 to 15 kt with gusts up to 20 kt this afternoon. Seas 3 to 4 ft. Patchy fog this morning. .TONIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. .SUN...SW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 3 to 4 ft. .SUN NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt, becoming NW 5 to 10 kt after midnight. Seas 2 to 4 ft. .MON...NE winds around 5 kt, becoming E in the afternoon. Seas 2 to 3 ft. Showers likely with a chance of tstms. Vsby 1 NM or less. .MON NIGHT...S winds 5 to 10 kt. Gusts up to 20 kt after midnight. Seas 3 to 5 ft. Showers likely with a chance of tstms. .TUE...W winds 5 to 10 kt with gusts up to 20 kt. Seas 4 to 7 ft. Showers likely with a chance of tstms. .TUE NIGHT...NW winds 5 to 10 kt. Seas 4 to 7 ft. A chance of showers. Vsby 1 to 3 NM. .WED...W winds around 5 kt. Seas 4 to 5 ft. .WED NIGHT...W winds 5 to 10 kt. Seas 2 to 4 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. $$ ANZ232-210000- Nantucket Sound- 716 AM EDT Sat Jul 20 2019 .TODAY...W winds 5 to 10 kt, becoming SW 10 to 15 kt with gusts up to 20 kt this afternoon. Seas around 2 ft. Patchy fog this morning with vsby 1 to 3 NM. .TONIGHT...SW winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt after midnight. Seas around 2 ft. Patchy fog. Vsby 1 to 3 NM. .SUN...SW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas around 2 ft. .SUN NIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Seas 2 to 3 ft. Scattered showers and tstms. Vsby 1 NM or less. .MON...N winds around 5 kt, becoming E in the afternoon. Seas around 2 ft. A chance of showers. .MON NIGHT...S winds 5 to 10 kt. Gusts up to 20 kt after midnight. Seas 2 to 3 ft. Showers likely with a chance of tstms. Vsby 1 to 3 NM. .TUE...W winds 5 to 10 kt with gusts up to 20 kt. Seas 2 to 3 ft. Showers likely with a chance of tstms. Vsby 1 to 3 NM. .TUE NIGHT...NW winds 5 to 10 kt. Seas 2 to 3 ft. Patchy fog. A chance of showers. Vsby 1 to 3 NM. .WED...SE winds around 5 kt. Seas 2 to 3 ft. .WED NIGHT...W winds around 5 kt. Seas 2 to 3 ft. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ233-210000- Vineyard Sound- 716 AM EDT Sat Jul 20 2019 .TODAY...W winds 5 to 10 kt, becoming SW 10 to 15 kt with gusts up to 20 kt this afternoon. Seas 2 to 3 ft. Patchy fog this morning with vsby 1 to 3 NM. .TONIGHT...SW winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt after midnight. Seas around 2 ft. .SUN...SW winds 5 to 10 kt. Seas 2 to 3 ft. .SUN NIGHT...W winds 5 to 10 kt, becoming NW after midnight. Seas 2 to 3 ft. .MON...NE winds around 5 kt, becoming E in the afternoon. Seas around 2 ft. A chance of showers. .MON NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. Showers likely with a chance of tstms. .TUE...W winds 5 to 10 kt. Seas 2 to 4 ft. Showers likely with a chance of tstms. .TUE NIGHT...NW winds around 5 kt. Seas 2 to 4 ft. Patchy fog. A chance of showers. Vsby 1 to 3 NM. .WED...W winds around 5 kt. Seas 2 to 3 ft. .WED NIGHT...W winds around 5 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. $$ ANZ234-210000- Buzzards Bay- 716 AM EDT Sat Jul 20 2019 .TODAY...W winds 5 to 10 kt, becoming SW 10 to 15 kt with gusts up to 20 kt this afternoon. Seas 2 to 3 ft. Patchy fog this morning with vsby 1 to 3 NM. .TONIGHT...SW winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt after midnight. Seas 2 to 3 ft. .SUN...SW winds 5 to 10 kt. Seas 2 to 3 ft. .SUN NIGHT...W winds 5 to 10 kt, becoming NW after midnight. Seas 2 to 3 ft. .MON...NE winds around 5 kt, becoming E in the afternoon. Seas around 2 ft. A chance of showers. .MON NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. Showers likely with a chance of tstms. Vsby 1 to 3 NM. .TUE...W winds 5 to 10 kt. Seas 2 to 3 ft. Showers likely with a chance of tstms. Vsby 1 to 3 NM. .TUE NIGHT...NW winds around 5 kt. Seas 2 to 3 ft. Patchy fog. A chance of showers. Vsby 1 to 3 NM. .WED...W winds around 5 kt. Seas 2 to 3 ft. .WED NIGHT...W winds around 5 kt. Seas around 2 ft. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ235-210000- Rhode Island Sound- 716 AM EDT Sat Jul 20 2019 .TODAY...W winds 5 to 10 kt, becoming SW 10 to 15 kt with gusts up to 20 kt this afternoon. Seas 2 to 4 ft. Patchy fog this morning. .TONIGHT...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. .SUN...W winds 5 to 10 kt, becoming SW 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. .SUN NIGHT...W winds 5 to 10 kt with gusts up to 20 kt, becoming NW after midnight. Seas 2 to 3 ft. .MON...NE winds around 5 kt, becoming SE in the afternoon. Seas around 2 ft. Showers likely with a chance of tstms. .MON NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. Showers likely with a chance of tstms. Vsby 1 to 3 NM. .TUE...W winds 5 to 10 kt. Seas 3 to 5 ft. Showers likely with a chance of tstms. Vsby 1 to 3 NM. .TUE NIGHT...NW winds around 5 kt. Seas 3 to 5 ft. Patchy fog. A chance of showers. Vsby 1 to 3 NM. .WED...W winds around 5 kt. Seas 2 to 4 ft. .WED NIGHT...W winds around 5 kt. Seas 2 to 3 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. $$ ANZ237-210000- Block Island Sound- 716 AM EDT Sat Jul 20 2019 .TODAY...W winds 5 to 10 kt, becoming SW 10 to 15 kt with gusts up to 20 kt this afternoon. Seas 2 to 4 ft. Patchy fog this morning. .TONIGHT...SW winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt after midnight. Seas 2 to 3 ft. .SUN...SW winds 5 to 10 kt. Gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. .SUN NIGHT...W winds 5 to 10 kt, becoming NW after midnight. Seas 2 to 3 ft. .MON...NE winds around 5 kt, becoming SE in the afternoon. Seas around 2 ft. Showers likely with a chance of tstms. Vsby 1 NM or less. .MON NIGHT...S winds 5 to 10 kt. Seas 2 to 4 ft. Showers likely with a chance of tstms. Vsby 1 to 3 NM. .TUE...W winds 5 to 10 kt. Seas 3 to 5 ft. Showers likely with a chance of tstms. Vsby 1 to 3 NM. .TUE NIGHT...NW winds around 5 kt. Seas 3 to 5 ft. Patchy fog. A chance of showers. Vsby 1 to 3 NM. .WED...W winds around 5 kt. Seas 2 to 4 ft. .WED NIGHT...W winds 5 to 10 kt. Seas 2 to 3 ft. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ230-210000- Boston Harbor- 716 AM EDT Sat Jul 20 2019 .TODAY...SW winds around 5 kt. Waves 1 foot or less. .TONIGHT...SW winds 5 to 10 kt. Waves 1 foot or less. .SUN...W winds around 5 kt. Waves 1 foot or less. Scattered showers and tstms. .SUN NIGHT...NW winds around 5 kt. Waves 1 foot or less. Scattered showers and tstms. .MON...N winds around 5 kt, becoming E in the afternoon. Waves 1 foot or less. A chance of showers. .MON NIGHT...E winds around 5 kt. Waves 1 foot or less. Patchy fog. Showers likely with a chance of tstms. Vsby 1 to 3 NM. .TUE...N winds around 5 kt. Waves 1 foot or less. Patchy fog. Showers likely with a chance of tstms. Vsby 1 to 3 NM. .TUE NIGHT...N winds around 5 kt. Waves 1 foot or less. Patchy fog. A chance of showers. Vsby 1 to 3 NM. .WED...SW winds around 5 kt. Waves 1 foot or less. .WED NIGHT...W 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. $$ ANZ236-210000- Narragansett Bay- 716 AM EDT Sat Jul 20 2019 .TODAY...SW winds 5 to 10 kt. Waves around 2 ft. Patchy fog this morning. .TONIGHT...SW winds 5 to 10 kt. Waves 2 to 3 ft. .SUN...SW winds 5 to 10 kt. Waves around 2 ft. .SUN NIGHT...W winds 5 to 10 kt, becoming NW after midnight. Waves around 2 ft. .MON...NE winds around 5 kt, becoming SE in the afternoon. Waves around 2 ft. A chance of showers. .MON NIGHT...SE winds around 5 kt. Waves around 2 ft. Patchy fog. Showers likely with a chance of tstms. Vsby 1 to 3 NM. .TUE...W winds 5 to 10 kt. Waves 2 to 3 ft. Patchy fog. Showers likely with a chance of tstms. Vsby 1 to 3 NM. .TUE NIGHT...W winds around 5 kt. Waves 2 to 3 ft. Patchy fog. A chance of showers. Vsby 1 to 3 NM. .WED...W winds around 5 kt. Waves 2 to 3 ft. .WED NIGHT...W winds around 5 kt. Waves around 2 ft. Winds and waves higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ For the latest updates...please visit our webpage at www.weather.gov/boston You can follow us on Facebook at www.facebook.com/us.nationalweatherservice.boston.gov You can follow us on Twitter at @NWSBoston

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