Coastal Waters Forecast
Issued by NWS Boston, MA

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059 FZUS51 KBOX 191953 CWFBOX Coastal Waters Forecast National Weather Service Boston/Norton MA 353 PM EDT Sat May 19 2018 Coastal waters from the Merrimack River MA to Watch Hill RI out to 25 NM ANZ200-200830- 353 PM EDT Sat May 19 2018 .Synopsis for Massachusetts and Rhode Island coastal waters... A warm front will lift north of the waters later tonight, with a cold front moving through Sun afternoon. Both fronts will offer scattered showers with a few rumbles of thunder. Fair weather high pressure will bring dry weather across the waters Mon through most of Tue. Rain chances increase Tue night into Wed morning as low pressure lifts overhead. Dry weather returns Wed and Thu as high pressure begins buildings over New England. 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. $$ ANZ250-200830- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 353 PM EDT Sat May 19 2018 ...SMALL CRAFT ADVISORY IN EFFECT FROM MIDNIGHT EDT TONIGHT THROUGH SUNDAY AFTERNOON... .TONIGHT...S winds 10 to 15 kt. Gusts up to 20 kt after midnight. Seas 3 to 5 ft. Patchy fog. A chance of rain. Vsby 1 NM or less. .SUN...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 6 ft. Patchy fog. A chance of showers. Vsby 1 NM or less. .SUN NIGHT...NW winds 5 to 10 kt. Seas 2 to 4 ft. .MON...NW winds around 5 kt, becoming SW 10 to 15 kt in the afternoon. Seas 2 to 3 ft. .MON NIGHT...SW winds 10 to 15 kt, becoming W around 5 kt after midnight. Seas 2 to 3 ft. .TUE...S winds 5 to 10 kt. Seas 2 to 3 ft. .TUE NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers. Vsby 1 to 3 NM. .WED...SW winds 5 to 10 kt. Seas around 2 ft. .WED NIGHT...N winds 5 to 10 kt. Seas around 2 ft. .THU...E winds 5 to 10 kt. Seas 2 to 3 ft. .THU NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ251-200830- Massachusetts Bay and Ipswich Bay- 353 PM EDT Sat May 19 2018 ...SMALL CRAFT ADVISORY IN EFFECT FROM MIDNIGHT EDT TONIGHT THROUGH SUNDAY MORNING... .TONIGHT...SE winds 5 to 10 kt, becoming S 10 to 15 kt after midnight. Seas 2 to 4 ft, building to 3 to 5 ft. Patchy fog. A chance of rain. Vsby 1 NM or less. .SUN...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Patchy fog. A chance of showers. Vsby 1 NM or less. .SUN NIGHT...NW winds 5 to 10 kt. Seas 2 to 3 ft. .MON...NW winds around 5 kt, becoming S in the afternoon. Seas around 2 ft. .MON NIGHT...SW winds 5 to 10 kt, becoming W after midnight. Seas 1 foot or less. .TUE...SE winds 5 to 10 kt. Seas around 2 ft. .TUE NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. A chance of showers. Vsby 1 to 3 NM. .WED...SW winds around 5 kt. Seas 1 foot or less. .WED NIGHT...N winds 5 to 10 kt. 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 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. $$ ANZ231-200830- Cape Cod Bay- 353 PM EDT Sat May 19 2018 ...SMALL CRAFT ADVISORY IN EFFECT FROM MIDNIGHT EDT TONIGHT THROUGH SUNDAY AFTERNOON... .TONIGHT...S winds 5 to 10 kt, becoming SW 10 to 15 kt with gusts up to 25 kt after midnight. Seas 2 to 3 ft. Patchy dense fog. A chance of rain. Vsby 1 NM or less. .SUN...SW winds 15 to 20 kt. Seas 2 to 3 ft. Patchy fog. A chance of showers. Vsby 1 NM or less. .SUN NIGHT...W winds 5 to 10 kt, becoming N after midnight. Seas around 2 ft. A chance of showers. .MON...N winds around 5 kt, becoming SW in the afternoon. Seas 1 foot or less. .MON NIGHT...SW winds 5 to 10 kt. Seas 1 foot or less. .TUE...S winds 5 to 10 kt. Seas 1 foot or less. .TUE NIGHT...S winds 5 to 10 kt. Seas 1 foot or less. Patchy fog. A chance of showers. Vsby 1 to 3 NM. .WED...SW winds around 5 kt. Seas 1 foot or less. .WED NIGHT...NW winds 5 to 10 kt. Seas 1 foot or less. .THU...E winds 5 to 10 kt. Seas around 2 ft. .THU NIGHT...SW winds 10 to 15 kt. Seas around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ254-200830- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm- 353 PM EDT Sat May 19 2018 ...SMALL CRAFT ADVISORY IN EFFECT FROM MIDNIGHT EDT TONIGHT THROUGH SUNDAY AFTERNOON... .TONIGHT...S winds 10 to 15 kt. Gusts up to 20 kt after midnight. Seas 4 to 6 ft. Patchy fog this evening, then patchy dense fog after midnight. A slight chance of rain this evening, then a chance of rain after midnight. Vsby 1 NM or less. .SUN...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 7 ft. Patchy dense fog. A chance of showers. Vsby 1 NM or less. .SUN NIGHT...W winds 10 to 15 kt with gusts up to 20 kt, becoming N 5 to 10 kt after midnight. Seas 3 to 5 ft. A chance of showers. Vsby 1 to 3 NM. .MON...N winds around 5 kt, becoming W in the afternoon. Seas 2 to 4 ft. .MON NIGHT...SW winds 5 to 10 kt. Seas 2 to 4 ft. .TUE...S winds 5 to 10 kt. Seas 2 to 3 ft. .TUE NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers. Vsby 1 to 3 NM. .WED...W winds 5 to 10 kt. Seas 2 to 3 ft. .WED NIGHT...NW winds 5 to 10 kt. Seas 2 to 3 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. 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. $$ ANZ255-200830- Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket- 353 PM EDT Sat May 19 2018 ...SMALL CRAFT ADVISORY IN EFFECT FROM MIDNIGHT EDT TONIGHT THROUGH SUNDAY AFTERNOON... .TONIGHT...S winds 10 to 15 kt, becoming SW 15 to 20 kt with gusts up to 25 kt after midnight. Seas 4 to 6 ft. Patchy dense fog. A slight chance of rain this evening. A chance of rain after midnight. Vsby 1 NM or less. .SUN...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 5 to 7 ft. Patchy dense fog. A chance of showers. Vsby 1 NM or less. .SUN NIGHT...W winds 10 to 15 kt with gusts up to 20 kt, becoming N 5 to 10 kt after midnight. Seas 4 to 7 ft. .MON...N winds 5 to 10 kt, becoming W in the afternoon. Seas 3 to 5 ft. .MON NIGHT...SW winds 5 to 10 kt. Seas 2 to 4 ft. .TUE...S winds 5 to 10 kt. Seas 2 to 3 ft. .TUE NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers. Vsby 1 to 3 NM. .WED...W winds 5 to 10 kt. Seas 2 to 4 ft. .WED NIGHT...NW winds around 10 kt. Seas 2 to 4 ft. .THU...E winds 5 to 10 kt. Seas 2 to 3 ft. .THU NIGHT...SW winds 10 to 15 kt. Seas 2 to 4 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ256-200830- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island- 353 PM EDT Sat May 19 2018 ...SMALL CRAFT ADVISORY IN EFFECT FROM MIDNIGHT EDT TONIGHT THROUGH SUNDAY AFTERNOON... .TONIGHT...S winds 10 to 15 kt, becoming SW 15 to 20 kt with gusts up to 25 kt after midnight. Seas 4 to 6 ft. Patchy dense fog. A chance of rain. Vsby 1 NM or less. .SUN...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 5 to 7 ft. Patchy dense fog. A chance of showers. Vsby 1 NM or less. .SUN NIGHT...W winds 10 to 15 kt with gusts up to 20 kt, becoming N 5 to 10 kt after midnight. Seas 4 to 7 ft. .MON...N winds around 5 kt, becoming SW in the afternoon. Seas 3 to 5 ft. .MON NIGHT...SW winds 5 to 10 kt. Seas 3 to 4 ft. .TUE...S winds around 5 kt, becoming SE in the afternoon. Seas 2 to 3 ft. .TUE NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. .WED...W winds 5 to 10 kt. Seas 2 to 4 ft. .WED NIGHT...NW winds 5 to 10 kt. Seas 2 to 4 ft. .THU...E winds 5 to 10 kt. Seas 2 to 3 ft. .THU 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. $$ ANZ232-200830- Nantucket Sound- 353 PM EDT Sat May 19 2018 ...SMALL CRAFT ADVISORY IN EFFECT FROM MIDNIGHT EDT TONIGHT THROUGH SUNDAY AFTERNOON... .TONIGHT...S winds 10 to 15 kt, becoming SW 15 to 20 kt after midnight. Gusts up to 25 kt. Seas 2 to 4 ft. Patchy dense fog. A chance of rain. Vsby 1 NM or less. .SUN...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. Patchy dense fog. A chance of showers. Vsby 1 NM or less. .SUN NIGHT...W winds 10 to 15 kt with gusts up to 20 kt, becoming N around 5 kt after midnight. Seas 2 to 4 ft. .MON...N winds around 5 kt, becoming SW in the afternoon. Seas 2 to 3 ft. .MON NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. .TUE...S winds 5 to 10 kt. Seas around 2 ft. .TUE NIGHT...S winds 5 to 10 kt. Seas around 2 ft. Patchy fog. A chance of showers. Vsby 1 to 3 NM. .WED...SW winds 5 to 10 kt. Seas around 2 ft. .WED NIGHT...NW winds 5 to 10 kt. Seas around 2 ft. .THU...E winds 5 to 10 kt. Seas around 2 ft. .THU NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ233-200830- Vineyard Sound- 353 PM EDT Sat May 19 2018 ...SMALL CRAFT ADVISORY IN EFFECT FROM MIDNIGHT EDT TONIGHT THROUGH SUNDAY AFTERNOON... .TONIGHT...S winds 10 to 15 kt, becoming SW 15 to 20 kt with gusts up to 25 kt after midnight. Seas 2 to 3 ft. Patchy dense fog. A chance of rain. Vsby 1 NM or less. .SUN...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. Patchy dense fog. A chance of showers. Vsby 1 NM or less. .SUN NIGHT...W winds 10 to 15 kt, becoming N around 5 kt after midnight. Seas 2 to 4 ft. .MON...N winds around 5 kt, becoming SW in the afternoon. Seas 2 to 3 ft. .MON NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. .TUE...S winds 5 to 10 kt. Seas around 2 ft. .TUE NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Patchy fog. A chance of showers. Vsby 1 to 3 NM. .WED...W winds 5 to 10 kt. Seas around 2 ft. .WED NIGHT...NW winds around 10 kt. Seas around 2 ft. .THU...E winds 5 to 10 kt. Seas around 2 ft. .THU NIGHT...SW winds around 10 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. $$ ANZ234-200830- Buzzards Bay- 353 PM EDT Sat May 19 2018 ...SMALL CRAFT ADVISORY IN EFFECT FROM MIDNIGHT EDT TONIGHT THROUGH SUNDAY AFTERNOON... .TONIGHT...S winds 10 to 15 kt. Gusts up to 25 kt after midnight. Seas 2 to 4 ft. Patchy dense fog. A chance of rain. Vsby 1 NM or less. .SUN...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. Patchy fog. A chance of showers. Vsby 1 NM or less. .SUN NIGHT...W winds 10 to 15 kt, becoming N around 5 kt after midnight. Seas 2 to 3 ft. .MON...N winds around 5 kt, becoming SW in the afternoon. Seas 2 to 3 ft. .MON NIGHT...SW winds 5 to 10 kt, diminishing to around 5 kt after midnight. Seas around 2 ft. .TUE...S winds around 5 kt, increasing to 5 to 10 kt in the afternoon. Seas around 2 ft. .TUE NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Patchy fog. A chance of showers. Vsby 1 to 3 NM. .WED...W winds 5 to 10 kt. Seas around 2 ft. Patchy fog. Vsby 1 to 3 NM. .WED NIGHT...NW winds 5 to 10 kt. Seas around 2 ft. .THU...E winds 5 to 10 kt. Seas 1 foot or less. .THU NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ235-200830- Rhode Island Sound- 353 PM EDT Sat May 19 2018 ...SMALL CRAFT ADVISORY IN EFFECT FROM MIDNIGHT EDT TONIGHT THROUGH SUNDAY AFTERNOON... .TONIGHT...S winds 10 to 15 kt, becoming SW 15 to 20 kt with gusts up to 25 kt after midnight. Seas 4 to 6 ft. Patchy dense fog. A chance of rain. Vsby 1 NM or less. .SUN...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 7 ft. Patchy fog. A chance of showers. Vsby 1 NM or less. .SUN NIGHT...W winds 10 to 15 kt, becoming N 5 to 10 kt after midnight. Seas 4 to 6 ft. .MON...N winds around 5 kt, becoming SW in the afternoon. Seas 3 to 5 ft. .MON NIGHT...SW winds 5 to 10 kt. Seas 2 to 4 ft. .TUE...S winds around 5 kt, increasing to 5 to 10 kt in the afternoon. Seas 2 to 3 ft. .TUE NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Patchy fog. Vsby 1 to 3 NM. .WED...W winds 5 to 10 kt. Seas 2 to 4 ft. Patchy fog. Vsby 1 to 3 NM. .WED NIGHT...NW winds 5 to 10 kt. Seas 2 to 4 ft. .THU...SE winds 5 to 10 kt. Seas around 2 ft. .THU NIGHT...SW winds around 10 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. $$ ANZ237-200830- Block Island Sound- 353 PM EDT Sat May 19 2018 ...SMALL CRAFT ADVISORY IN EFFECT FROM MIDNIGHT EDT TONIGHT THROUGH SUNDAY AFTERNOON... .TONIGHT...S winds 10 to 15 kt. Gusts up to 25 kt after midnight. Seas 3 to 5 ft. Patchy dense fog. A chance of rain. Vsby 1 NM or less. .SUN...SW winds 10 to 15 kt with gusts up to 25 kt. Seas 4 to 6 ft. Patchy dense fog. A chance of showers. Vsby 1 NM or less. .SUN NIGHT...W winds 5 to 10 kt, becoming N after midnight. Seas 3 to 5 ft. .MON...N winds around 5 kt, becoming SW in the afternoon. Seas 2 to 4 ft. .MON NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. .TUE...S winds around 5 kt, becoming SE in the afternoon. Seas around 2 ft. A chance of showers. Vsby 1 to 3 NM. .TUE NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Patchy fog. Vsby 1 to 3 NM. .WED...W winds 5 to 10 kt. Seas 2 to 3 ft. Patchy fog. Vsby 1 to 3 NM. .WED NIGHT...NW winds 5 to 10 kt. Seas 2 to 3 ft. .THU...SE winds 5 to 10 kt. Seas around 2 ft. .THU NIGHT...SW winds around 10 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ230-200830- Boston Harbor- 353 PM EDT Sat May 19 2018 ...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH SUNDAY MORNING... .TONIGHT...SE winds 5 to 10 kt, becoming SW 10 to 15 kt after midnight. Gusts up to 25 kt. Waves 2 to 3 ft. Patchy fog. A chance of rain. Vsby 1 NM or less. .SUN...SW winds 10 to 15 kt with gusts up to 20 kt. Waves 2 to 3 ft. Patchy fog. Showers likely. Vsby 1 NM or less. .SUN NIGHT...NW winds 5 to 10 kt. Waves around 2 ft. .MON...NW winds around 5 kt, becoming SW in the afternoon. Waves 1 foot or less. .MON NIGHT...SW winds 5 to 10 kt, becoming W after midnight. Waves 1 foot or less. .TUE...E winds around 5 kt, becoming S in the afternoon. Waves 1 foot or less. .TUE NIGHT...SW winds 5 to 10 kt. Waves 1 foot or less. Patchy fog. A chance of showers. Vsby 1 to 3 NM. .WED...W winds around 5 kt. Waves 1 foot or less. .WED NIGHT...N winds around 5 kt. Waves 1 foot or less. .THU...SE winds around 5 kt. Waves 1 foot or less. .THU NIGHT...SW winds 5 to 10 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. $$ ANZ236-200830- Narragansett Bay- 353 PM EDT Sat May 19 2018 ...SMALL CRAFT ADVISORY IN EFFECT FROM MIDNIGHT EDT TONIGHT THROUGH SUNDAY AFTERNOON... .TONIGHT...S winds 5 to 10 kt, becoming SW 10 to 15 kt with gusts up to 25 kt after midnight. Waves 2 to 4 ft. Patchy fog. A chance of rain. Vsby 1 NM or less. .SUN...SW winds 10 to 15 kt with gusts up to 25 kt. Waves 2 to 4 ft. Patchy fog. A chance of showers. Vsby 1 NM or less. .SUN NIGHT...NW winds 5 to 10 kt. Waves 2 to 4 ft. A chance of showers. .MON...N winds around 5 kt, becoming SW in the afternoon. Waves 2 to 3 ft. .MON NIGHT...SW winds 5 to 10 kt, becoming W after midnight. Waves around 2 ft. .TUE...S winds around 5 kt, increasing to 5 to 10 kt in the afternoon. Waves around 2 ft. .TUE NIGHT...S winds 5 to 10 kt, becoming SW after midnight. Waves around 2 ft. Patchy fog. A chance of showers. Vsby 1 to 3 NM. .WED...W winds around 5 kt. Waves around 2 ft. Patchy fog. Vsby 1 to 3 NM. .WED NIGHT...NW winds around 5 kt. Waves around 2 ft. .THU...S winds 5 to 10 kt. Waves around 2 ft. .THU NIGHT...SW winds 5 to 10 kt. Waves around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ 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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