Coastal Waters Forecast
Issued by NWS Boston, MA

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000 FZUS51 KBOX 211716 CWFBOX Coastal Waters Forecast for Massachusetts National Weather Service Boston/Norton MA 116 PM EDT Sat Sep 21 2019 Coastal waters from the Merrimack River MA to Watch Hill RI out to 25 NM ANZ200-220600- 116 PM EDT Sat Sep 21 2019 .Synopsis for Massachusetts and Rhode Island coastal waters... High pres builds slowly S of the waters through Sun. Meanwhile lingering E swell from distant Hurricane Humberto will impact the waters today. A cold front approaches the waters Mon night, sweeping across the waters early Tue. Another high pres area builds over the waters 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. $$ ANZ250-220600- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 116 PM EDT Sat Sep 21 2019 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 PM EDT THIS AFTERNOON... .THIS AFTERNOON...S winds around 5 kt. Seas around 4 ft. .TONIGHT...S winds 5 to 10 kt. Seas 3 to 4 ft. .SUN...S winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Seas around 3 ft. .SUN NIGHT...SW winds 15 to 20 kt. Seas around 4 ft. .MON...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 5 to 6 ft. .MON NIGHT...SW winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 5 to 6 ft. Showers likely. .TUE...W winds 5 to 10 kt. Seas 3 to 4 ft. A chance of showers. .TUE NIGHT...NW winds 5 to 10 kt. Seas around 3 ft. .WED...N winds 5 to 10 kt, becoming NE in the afternoon. Seas around 3 ft. .WED NIGHT...S winds 5 to 10 kt. Seas around 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ251-220600- Massachusetts Bay and Ipswich Bay- 116 PM EDT Sat Sep 21 2019 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 PM EDT THIS AFTERNOON... .THIS AFTERNOON...SE winds around 5 kt. Seas around 4 ft. .TONIGHT...S winds 5 to 10 kt. Seas around 3 ft. .SUN...S winds 5 to 10 kt, increasing to 10 to 15 kt in the afternoon. Seas around 2 ft. .SUN NIGHT...SW winds 10 to 15 kt. Seas around 2 ft. .MON...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 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 around 3 ft. Showers likely. .TUE...W winds 5 to 10 kt. Seas around 2 ft. A chance of showers in the morning. .TUE NIGHT...NW winds 5 to 10 kt. Seas around 2 ft. .WED...N winds 5 to 10 kt, becoming NE in the afternoon. Seas around 2 ft. .WED NIGHT...S winds 5 to 10 kt. Seas around 2 ft in the evening, then 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. $$ ANZ231-220600- Cape Cod Bay- 116 PM EDT Sat Sep 21 2019 .THIS AFTERNOON...NE winds around 5 kt. Seas around 2 ft. .TONIGHT...S winds 5 to 10 kt. Seas around 2 ft in the evening, then 1 foot or less. .SUN...S winds 5 to 10 kt, becoming SW 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 1 foot or less, then around 2 ft in the afternoon. .SUN NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. .MON...SW winds 10 to 15 kt, increasing to 15 to 20 kt in the afternoon. Gusts up to 25 kt. Seas 3 to 4 ft. .MON NIGHT...SW winds 10 to 15 kt with gusts up to 25 kt. Seas around 4 ft, subsiding to 2 ft after midnight. Showers likely. .TUE...W winds 5 to 10 kt. Seas 1 foot or less. A chance of showers. .TUE NIGHT...NW winds 5 to 10 kt. Seas 1 foot or less, then around 2 ft after midnight. .WED...N winds 5 to 10 kt. Seas around 2 ft. .WED NIGHT...S winds around 5 kt. Seas 1 foot or less. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ254-220600- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm- 116 PM EDT Sat Sep 21 2019 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 PM EDT THIS AFTERNOON... .THIS AFTERNOON...NW winds around 5 kt. Seas around 4 ft. .TONIGHT...S winds 5 to 10 kt. Seas 3 to 4 ft. .SUN...S winds 5 to 10 kt, becoming SW 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas around 3 ft. Patchy fog in the afternoon with vsby 1 to 3 NM. .SUN NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 3 ft, building to 5 ft after midnight. Patchy fog in the evening with vsby 1 to 3 NM. .MON...SW winds 15 to 20 kt with gusts up to 25 kt. Seas around 6 ft. .MON NIGHT...SW winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 25 kt. Seas around 6 ft. A chance of showers in the evening, then showers likely after midnight. .TUE...W winds 5 to 10 kt. Seas around 5 ft. A chance of showers. .TUE NIGHT...W winds 5 to 10 kt, becoming NW after midnight. Seas around 4 ft. .WED...N winds 5 to 10 kt. Seas around 5 ft. .WED NIGHT...SE winds around 5 kt, becoming SW around 5 kt after midnight. 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. $$ ANZ255-220600- Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket- 116 PM EDT Sat Sep 21 2019 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 PM EDT THIS AFTERNOON... .THIS AFTERNOON...W winds around 5 kt. Seas around 4 ft. .TONIGHT...S winds around 5 kt. Seas 2 to 3 ft. .SUN...SW winds 5 to 10 kt, increasing to 10 to 15 kt in the afternoon. Seas 2 to 3 ft. Patchy fog in the afternoon with vsby 1 to 3 NM. .SUN NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 5 ft. Patchy fog in the evening with vsby 1 to 3 NM. .MON...SW winds 15 to 20 kt with gusts up to 25 kt. Seas around 6 ft. .MON NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Seas around 7 ft. A chance of showers in the evening, then showers likely after midnight. .TUE...W winds around 10 kt. Seas around 7 ft, subsiding to 5 ft in the afternoon. A chance of showers. .TUE NIGHT...NW winds 5 to 10 kt. Seas around 5 ft. .WED...N winds 5 to 10 kt. Seas around 5 ft. .WED NIGHT...S winds around 5 kt, becoming SW around 5 kt after midnight. Seas 4 to 5 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ256-220600- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island- 116 PM EDT Sat Sep 21 2019 .THIS AFTERNOON...SW winds around 5 kt. Seas around 3 ft. .TONIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. .SUN...SW winds 5 to 10 kt, increasing to 10 to 15 kt in the afternoon. Seas 2 to 3 ft. Patchy fog in the afternoon with vsby 1 to 3 NM. .SUN NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 5 ft. Patchy fog in the evening with vsby 1 to 3 NM. .MON...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 6 to 7 ft. .MON NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Seas around 7 ft. Showers likely. .TUE...W winds around 10 kt. Seas 5 to 6 ft. A chance of showers in the morning. .TUE NIGHT...NW winds 5 to 10 kt. Seas around 5 ft. .WED...N winds 5 to 10 kt, becoming W in the afternoon. Seas around 5 ft. .WED NIGHT...SW winds around 5 kt. Seas around 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. $$ ANZ232-220600- Nantucket Sound- 116 PM EDT Sat Sep 21 2019 .THIS AFTERNOON...SW winds around 5 kt. Seas around 2 ft. .TONIGHT...S winds around 5 kt. Seas around 2 ft in the evening, then 1 foot or less. .SUN...SW winds 5 to 10 kt, increasing to 10 to 15 kt in the afternoon. Seas 1 foot or less, then around 2 ft in the afternoon. .SUN NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. .MON...SW winds 15 to 20 kt with gusts up to 25 kt. Seas around 3 ft. .MON NIGHT...SW winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 25 kt. Seas around 3 ft. Showers likely. .TUE...W winds 5 to 10 kt. Seas around 2 ft. A chance of showers. .TUE NIGHT...NW winds 5 to 10 kt. Seas around 2 ft. .WED...N winds 5 to 10 kt, diminishing to around 5 kt in the afternoon. Seas around 3 ft. .WED NIGHT...S winds around 5 kt, becoming SW after midnight. Seas around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ233-220600- Vineyard Sound- 116 PM EDT Sat Sep 21 2019 .THIS AFTERNOON...SW winds around 5 kt. Seas around 2 ft. .TONIGHT...S winds around 5 kt. Seas around 2 ft in the evening, then 1 foot or less. .SUN...SW winds 5 to 10 kt, increasing to 10 to 15 kt in the afternoon. Seas 1 foot or less, then around 2 ft in the afternoon. .SUN NIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt after midnight. Seas around 2 ft, building to 4 ft after midnight. .MON...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 5 ft. .MON NIGHT...SW winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 4 to 5 ft. Showers likely. .TUE...W winds 5 to 10 kt. Seas 3 to 4 ft. A chance of showers. .TUE NIGHT...NW winds 5 to 10 kt. Seas around 3 ft. .WED...NW winds 5 to 10 kt, becoming SW in the afternoon. Seas around 3 ft. .WED NIGHT...SW winds around 5 kt. Seas around 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. $$ ANZ234-220600- Buzzards Bay- 116 PM EDT Sat Sep 21 2019 .THIS AFTERNOON...S winds 5 to 10 kt. Seas 1 foot or less. .TONIGHT...S winds around 5 kt. Seas 1 foot or less. .SUN...SW winds 5 to 10 kt, increasing to 10 to 15 kt in the afternoon. Seas 1 foot or less, then around 2 ft in the afternoon. .SUN NIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt after midnight. Seas 2 to 3 ft. Patchy fog in the evening with vsby 1 to 3 NM. .MON...SW winds 15 to 20 kt with gusts up to 25 kt. Seas around 4 ft. .MON NIGHT...SW winds 10 to 15 kt with gusts up to 25 kt. Seas around 4 ft. Showers likely. .TUE...W winds 5 to 10 kt. Seas around 3 ft. A chance of showers. .TUE NIGHT...NW winds 5 to 10 kt. Seas around 3 ft. .WED...NW winds 5 to 10 kt, becoming SW in the afternoon. Seas around 3 ft. .WED NIGHT...SW winds around 5 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ235-220600- Rhode Island Sound- 116 PM EDT Sat Sep 21 2019 .THIS AFTERNOON...SW winds around 5 kt. Seas around 2 ft. .TONIGHT...SW winds 5 to 10 kt. Seas around 2 ft. .SUN...SW winds 5 to 10 kt, increasing to 10 to 15 kt in the afternoon. Seas 2 to 3 ft. Patchy fog in the afternoon with vsby 1 to 3 NM. .SUN NIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt after midnight. Seas 3 to 4 ft. Patchy fog in the evening with vsby 1 to 3 NM. .MON...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 5 to 6 ft. .MON NIGHT...SW winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 25 kt. Seas around 6 ft. Showers likely. .TUE...W winds around 10 kt. Seas 4 to 5 ft. A chance of showers in the morning. .TUE NIGHT...NW winds 5 to 10 kt. Seas 4 to 5 ft. .WED...NW winds 5 to 10 kt, becoming SW in the afternoon. Seas around 5 ft. .WED NIGHT...SW winds around 5 kt. Seas around 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. $$ ANZ237-220600- Block Island Sound- 116 PM EDT Sat Sep 21 2019 .THIS AFTERNOON...SW winds around 5 kt. Seas around 2 ft. .TONIGHT...SW winds around 5 kt. Seas around 2 ft. .SUN...SW winds 5 to 10 kt, increasing to 10 to 15 kt in the afternoon. Seas around 2 ft. .SUN NIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt after midnight. Seas 3 to 4 ft. .MON...SW winds 10 to 15 kt, increasing to 15 to 20 kt in the afternoon. Gusts up to 25 kt. Seas around 5 ft. .MON NIGHT...SW winds 15 to 20 kt, becoming W 10 to 15 kt after midnight. Gusts up to 25 kt. Seas around 5 ft. Showers likely. .TUE...W winds 5 to 10 kt. Seas 4 to 5 ft. A chance of showers in the morning. .TUE NIGHT...NW winds 5 to 10 kt. Seas 4 to 5 ft. .WED...NW winds 5 to 10 kt, becoming SW in the afternoon. Seas around 5 ft. .WED NIGHT...SW winds around 5 kt. Seas 4 to 5 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ230-220600- Boston Harbor- 116 PM EDT Sat Sep 21 2019 .THIS AFTERNOON...SE winds 5 to 10 kt. Waves 1 foot or less. .TONIGHT...S winds 5 to 10 kt. Waves 1 foot or less. .SUN...SW winds 5 to 10 kt. Waves 1 foot or less. .SUN NIGHT...SW winds around 10 kt. Waves 1 foot or less. .MON...SW winds 10 to 15 kt with gusts up to 20 kt. Waves around 2 ft. .MON NIGHT...SW winds 10 to 15 kt, becoming W 5 to 10 kt after midnight. Waves around 2 ft in the evening, then 1 foot or less. Showers likely. .TUE...W winds 5 to 10 kt. Waves 1 foot or less. A chance of showers in the morning. .TUE NIGHT...NW winds 5 to 10 kt. Waves 1 foot or less. .WED...NW winds 5 to 10 kt, becoming NE in the afternoon. Waves 1 foot or less. .WED NIGHT...SE winds around 5 kt, becoming SW after midnight. 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. $$ ANZ236-220600- Narragansett Bay- 116 PM EDT Sat Sep 21 2019 .THIS AFTERNOON...S winds 5 to 10 kt. Waves around 2 ft. .TONIGHT...S winds around 5 kt. Waves around 2 ft in the evening, then 1 foot or less. .SUN...SW winds 5 to 10 kt. Waves 1 foot or less, then around 2 ft in the afternoon. .SUN NIGHT...SW winds around 10 kt. Waves 2 to 3 ft. .MON...SW winds 10 to 15 kt with gusts up to 25 kt. Waves around 4 ft. .MON NIGHT...SW winds 10 to 15 kt, diminishing to 5 to 10 kt after midnight. Gusts up to 20 kt. Waves around 4 ft. Showers likely. .TUE...W winds 5 to 10 kt. Waves 3 to 4 ft. A chance of showers in the morning. .TUE NIGHT...NW winds 5 to 10 kt. Waves around 3 ft. .WED...NW winds around 5 kt, becoming SW in the afternoon. Waves 3 to 4 ft. .WED NIGHT...SW winds around 5 kt. Waves 3 to 4 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ 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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