Coastal Waters Forecast
Issued by NWS Boston, MA

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815 FZUS51 KBOX 192320 CWFBOX Coastal Waters Forecast National Weather Service Boston/Norton MA 720 PM EDT Fri Jul 19 2019 Coastal waters from the Merrimack River MA to Watch Hill RI out to 25 NM ANZ200-201200- 720 PM EDT Fri Jul 19 2019 .Synopsis for Massachusetts and Rhode Island coastal waters... The heat and humidity of today will continue to build across the waters Sat and Sunday. Scattered showers and thunderstorms may develop Sunday afternoon into Sunday night as a frontal boundary meanders across the region then becomes stationary near the south coast. The front may become the focus for showers and thunderstorms across the southern half of the waters Mon and Tue. 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. $$ ANZ250-201200- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 720 PM EDT Fri Jul 19 2019 .TONIGHT...SW winds 5 to 10 kt with gusts up to 20 kt. Seas 2 to 4 ft. .SAT...SW winds 5 to 10 kt. Seas 2 to 3 ft. .SAT NIGHT...SW winds 10 to 15 kt, diminishing to 5 to 10 kt after midnight. Seas 2 to 3 ft. .SUN...SW winds 5 to 10 kt. Seas 2 to 3 ft. .SUN NIGHT...NW winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers and tstms. .MON...N winds 5 to 10 kt, becoming E in the afternoon. Seas 2 to 3 ft. Showers and tstms likely. .MON NIGHT...SE winds around 5 kt, becoming NE after midnight. Seas 2 to 3 ft. Showers and tstms likely. .TUE...N winds 5 to 10 kt. Seas 2 to 4 ft. A chance of showers. .TUE NIGHT...SW winds around 5 kt. Seas 2 to 4 ft. .WED...E winds 5 to 10 kt. Seas around 2 ft. .WED NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ251-201200- Massachusetts Bay and Ipswich Bay- 720 PM EDT Fri Jul 19 2019 .TONIGHT...SW winds 5 to 10 kt. Gusts up to 20 kt this evening. Seas 2 to 3 ft. .SAT...W winds 5 to 10 kt, becoming S in the afternoon. Seas around 2 ft. .SAT NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. .SUN...SW winds 5 to 10 kt. Seas around 2 ft. A chance of showers and tstms. .SUN NIGHT...NW winds 5 to 10 kt. Seas around 2 ft. A chance of showers and tstms. .MON...N winds around 5 kt, becoming E in the afternoon. Seas around 2 ft. Showers and tstms likely. .MON NIGHT...SE winds around 5 kt, becoming NE after midnight. Seas around 2 ft. Showers and tstms likely. .TUE...N winds around 5 kt. Seas around 2 ft. A chance of showers. .TUE NIGHT...SW winds around 5 kt. Seas around 2 ft. .WED...E winds around 5 kt. Seas around 2 ft. .WED NIGHT...SW 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. $$ ANZ231-201200- Cape Cod Bay- 720 PM EDT Fri Jul 19 2019 .TONIGHT...SW winds 5 to 10 kt. Gusts up to 20 kt this evening. Seas around 2 ft. .SAT...SW winds 5 to 10 kt. Gusts up to 20 kt in the afternoon. Seas 1 foot or less. .SAT NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt after midnight. Seas 1 foot or less. .SUN...SW winds 5 to 10 kt. Gusts up to 20 kt in the afternoon. Seas around 2 ft. A chance of showers and tstms. .SUN NIGHT...W winds 5 to 10 kt, becoming NW after midnight. Seas around 2 ft. A chance of showers and tstms. .MON...N winds 5 to 10 kt, becoming E in the afternoon. Seas around 2 ft. Showers and tstms likely. .MON NIGHT...S winds around 5 kt, becoming SW after midnight. Seas around 2 ft. Showers and tstms likely. .TUE...NW winds 5 to 10 kt with gusts up to 20 kt. Seas around 2 ft. A chance of showers. .TUE NIGHT...SW winds around 5 kt. Seas around 2 ft. A chance of showers. .WED...NE winds around 5 kt. Seas around 2 ft. .WED NIGHT...SW winds around 5 kt. Seas around 2 ft. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ254-201200- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm- 720 PM EDT Fri Jul 19 2019 .TONIGHT...SW winds 5 to 10 kt with gusts up to 20 kt. Seas 2 to 4 ft. Patchy fog. Vsby 1 NM or less. .SAT...SW winds 5 to 10 kt. Seas 2 to 4 ft. .SAT NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt after midnight. Seas 2 to 4 ft. .SUN...SW winds 5 to 10 kt. 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. A chance of showers and tstms. .MON...N winds 5 to 10 kt, becoming E in the afternoon. Seas 2 to 4 ft. Showers and tstms likely. .MON NIGHT...SE winds 5 to 10 kt, becoming SW after midnight. Gusts up to 20 kt. Seas 3 to 5 ft. Showers and tstms likely. .TUE...NW winds 5 to 10 kt with gusts up to 20 kt. Seas 3 to 5 ft. A chance of showers. .TUE NIGHT...W winds around 5 kt. Seas 3 to 5 ft. A chance of showers. .WED...E winds around 5 kt. Seas 2 to 4 ft. .WED NIGHT...SW 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. $$ ANZ255-201200- Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket- 720 PM EDT Fri Jul 19 2019 .TONIGHT...SW winds 5 to 10 kt with gusts up to 20 kt. Seas around 4 ft. Patchy fog. Vsby 1 NM or less. .SAT...SW winds 5 to 10 kt. Gusts up to 20 kt in the afternoon. Seas 2 to 4 ft. Patchy fog. Vsby 1 NM or less. .SAT NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt after midnight. Seas 2 to 4 ft. .SUN...SW winds 5 to 10 kt. Gusts up to 20 kt in the afternoon. Seas 2 to 4 ft. .SUN NIGHT...W winds 5 to 10 kt. Gusts up to 20 kt in the evening. Seas 2 to 4 ft. A chance of showers and tstms. .MON...N winds around 5 kt, becoming E in the afternoon. Seas 2 to 4 ft. Showers and tstms likely. .MON NIGHT...S winds 5 to 10 kt with gusts up to 20 kt. Seas 3 to 5 ft. Showers and tstms likely. .TUE...W winds 5 to 10 kt with gusts up to 20 kt. Seas 4 to 7 ft. Showers likely with a chance of tstms. .TUE NIGHT...W winds around 5 kt. Seas 4 to 7 ft. A chance of showers. .WED...E winds around 5 kt. Seas 3 to 5 ft. .WED NIGHT...SW winds around 5 kt. Seas 2 to 3 ft. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ256-201200- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island- 720 PM EDT Fri Jul 19 2019 .TONIGHT...SW winds 10 to 15 kt, diminishing to 5 to 10 kt after midnight. Gusts up to 20 kt. Seas around 4 ft. Patchy fog this evening with vsby 1 to 3 NM. .SAT...W winds 5 to 10 kt, becoming SW 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 3 to 4 ft. .SAT NIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas 3 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 2 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. A chance of showers and tstms. .MON...N winds around 5 kt, becoming E in the afternoon. Seas 2 to 4 ft. Showers and tstms likely. .MON NIGHT...S winds 5 to 10 kt with gusts up to 20 kt. Seas 4 to 6 ft. Showers and tstms likely. .TUE...NW winds 5 to 10 kt with gusts up to 20 kt. Seas 4 to 6 ft. A chance of showers. .TUE NIGHT...W winds around 5 kt. Seas 4 to 6 ft. A chance of showers. .WED...E winds 5 to 10 kt. Seas 3 to 4 ft. .WED NIGHT...W winds 5 to 10 kt. Seas around 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. $$ ANZ232-201200- Nantucket Sound- 720 PM EDT Fri Jul 19 2019 .TONIGHT...SW winds 5 to 10 kt with gusts up to 20 kt. Seas 2 to 3 ft. Patchy fog. Vsby 1 NM or less. .SAT...W winds 5 to 10 kt, becoming SW 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas around 2 ft. .SAT NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt after midnight. Seas 2 to 3 ft. .SUN...SW winds 5 to 10 kt. Gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. A chance of showers and tstms. .SUN NIGHT...W winds 5 to 10 kt. Gusts up to 20 kt in the evening. Seas 2 to 3 ft. A chance of showers and tstms. .MON...N winds around 5 kt, becoming E in the afternoon. Seas around 2 ft. Showers and tstms likely. .MON NIGHT...SE winds 5 to 10 kt, becoming SW after midnight. Gusts up to 20 kt. Seas 2 to 3 ft. Showers and tstms likely. .TUE...NW winds 5 to 10 kt with gusts up to 20 kt. Seas 2 to 4 ft. Showers likely with a chance of tstms. .TUE NIGHT...W winds around 5 kt. Seas 2 to 3 ft. A chance of showers. .WED...E winds around 5 kt. Seas 2 to 3 ft. .WED NIGHT...SW winds around 5 kt. Seas around 2 ft. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ233-201200- Vineyard Sound- 720 PM EDT Fri Jul 19 2019 .TONIGHT...SW winds 5 to 10 kt with gusts up to 20 kt. Seas 2 to 3 ft. Patchy fog. Vsby 1 to 3 NM, decreasing to 1 NM or less after midnight. .SAT...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. .SAT 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. .SUN...SW winds 5 to 10 kt. Gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. .SUN NIGHT...SW winds 5 to 10 kt with gusts up to 20 kt, becoming NW after midnight. Seas 2 to 3 ft. A chance of showers and tstms. .MON...N winds around 5 kt, becoming E in the afternoon. Seas around 2 ft. Showers and tstms likely. .MON NIGHT...SE winds 5 to 10 kt, becoming SW after midnight. Seas 2 to 3 ft. Showers and tstms likely. .TUE...NW winds 5 to 10 kt with gusts up to 20 kt. Seas 2 to 4 ft. A chance of showers. .TUE NIGHT...W winds around 5 kt. Seas 2 to 4 ft. A chance of showers. .WED...E winds around 5 kt. Seas 2 to 3 ft. .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. $$ ANZ234-201200- Buzzards Bay- 720 PM EDT Fri Jul 19 2019 .TONIGHT...SW winds 5 to 10 kt. Gusts up to 20 kt this evening. Seas 2 to 3 ft. Patchy fog after midnight with vsby 1 NM or less. .SAT...SW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. .SAT NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt after midnight. Seas 2 to 3 ft. .SUN...SW winds 5 to 10 kt. Gusts up to 25 kt in the afternoon. Seas 2 to 4 ft. A chance of showers and tstms. .SUN NIGHT...SW winds 5 to 10 kt with gusts up to 20 kt, becoming NW after midnight. Seas 2 to 3 ft. A chance of showers and tstms. .MON...N winds around 5 kt, becoming E in the afternoon. Seas around 2 ft. Showers and tstms likely. .MON NIGHT...SE winds around 5 kt, becoming SW after midnight. Seas 2 to 3 ft. Showers and tstms likely. .TUE...NW winds 5 to 10 kt with gusts up to 20 kt. Seas 2 to 4 ft. A chance of showers. .TUE NIGHT...W winds around 5 kt. Seas 2 to 4 ft. A chance of showers. .WED...E winds around 5 kt. Seas 2 to 3 ft. .WED NIGHT...SW winds around 5 kt. Seas around 2 ft. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ235-201200- Rhode Island Sound- 720 PM EDT Fri Jul 19 2019 .TONIGHT...SW winds 5 to 10 kt with gusts up to 20 kt. Seas 3 to 4 ft. Patchy fog. Vsby 1 to 3 NM, decreasing to 1 NM or less after midnight. .SAT...W winds 5 to 10 kt, becoming SW 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 2 to 4 ft. .SAT NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt after midnight. Seas around 3 ft. .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 3 ft. .SUN NIGHT...W winds 5 to 10 kt. Gusts up to 20 kt in the evening. Seas 2 to 3 ft. A chance of showers and tstms. .MON...N winds around 5 kt, becoming E in the afternoon. Seas 2 to 3 ft. Showers and tstms likely. .MON NIGHT...S winds 5 to 10 kt. Gusts up to 20 kt in the evening. Seas 3 to 5 ft. Showers and tstms likely. .TUE...NW winds 5 to 10 kt with gusts up to 20 kt. Seas 4 to 6 ft. A chance of showers. .TUE NIGHT...W winds around 5 kt. Seas 4 to 6 ft. .WED...E winds around 5 kt. Seas 3 to 5 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. $$ ANZ237-201200- Block Island Sound- 720 PM EDT Fri Jul 19 2019 .TONIGHT...SW winds 5 to 10 kt. Gusts up to 20 kt this evening. Seas 2 to 4 ft. Patchy fog. A slight chance of showers and tstms this evening. Vsby 1 NM or less, increasing to 1 to 3 NM after midnight. .SAT...SW winds 5 to 10 kt. Gusts up to 20 kt in the afternoon. Seas 2 to 4 ft. .SAT NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt after midnight. Seas 2 to 4 ft. .SUN...SW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. .SUN NIGHT...W winds 5 to 10 kt. Gusts up to 20 kt in the evening. Seas 2 to 3 ft. A chance of showers and tstms. .MON...N winds around 5 kt, becoming E in the afternoon. Seas 2 to 3 ft. Showers and tstms likely. .MON NIGHT...S winds 5 to 10 kt. Seas 2 to 4 ft. Showers and tstms likely. .TUE...NW winds 5 to 10 kt. Seas 3 to 5 ft. A chance of showers. .TUE NIGHT...W winds around 5 kt. Seas 3 to 5 ft. .WED...E winds around 5 kt. Seas 2 to 4 ft. .WED NIGHT...W winds 5 to 10 kt. Seas 2 to 3 ft. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ230-201200- Boston Harbor- 720 PM EDT Fri Jul 19 2019 .TONIGHT...SW winds 5 to 10 kt. Waves 1 foot or less. .SAT...SW winds 5 to 10 kt. Waves 1 foot or less. .SAT NIGHT...SW winds 5 to 10 kt. Waves 1 foot or less. .SUN...W winds around 5 kt. Waves 1 foot or less. A chance of showers and tstms. .SUN NIGHT...NW winds around 5 kt. Waves 1 foot or less. A chance of showers and tstms. .MON...N winds around 5 kt, becoming E in the afternoon. Waves 1 foot or less. Showers and tstms likely. .MON NIGHT...E winds around 5 kt, becoming NE after midnight. Waves 1 foot or less. Showers and tstms likely. .TUE...N winds around 5 kt. Waves 1 foot or less. A chance of showers. .TUE NIGHT...SW winds around 5 kt. Waves 1 foot or less. .WED...SE winds around 5 kt. Waves 1 foot or less. .WED NIGHT...SW 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. $$ ANZ236-201200- Narragansett Bay- 720 PM EDT Fri Jul 19 2019 .TONIGHT...SW winds 5 to 10 kt. Gusts up to 20 kt this evening. Waves 2 to 3 ft. Patchy fog after midnight with vsby 1 to 3 NM. .SAT...SW winds 5 to 10 kt. Gusts up to 20 kt in the afternoon. Waves 2 to 3 ft. .SAT NIGHT...SW winds 5 to 10 kt. Gusts up to 20 kt in the evening. Waves 2 to 3 ft. .SUN...SW winds 5 to 10 kt. Gusts up to 20 kt in the afternoon. Waves 2 to 3 ft. .SUN NIGHT...W winds 5 to 10 kt. Gusts up to 20 kt in the evening. Waves 2 to 3 ft. A chance of showers and tstms. .MON...N winds around 5 kt, becoming E in the afternoon. Waves 2 to 3 ft. Showers and tstms likely. .MON NIGHT...SE winds around 5 kt, becoming W after midnight. Waves 2 to 3 ft. Showers and tstms likely. .TUE...NW winds around 5 kt. Waves 2 to 3 ft. A chance of showers. .TUE NIGHT...W winds around 5 kt. Waves 2 to 4 ft. .WED...SW winds around 5 kt. Waves 2 to 3 ft. .WED NIGHT...W winds around 5 kt. Waves 2 to 3 ft. Winds and waves higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ 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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