Coastal Waters Forecast
Issued by NWS Boston, MA

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000 FZUS51 KBOX 150921 CWFBOX Coastal Waters Forecast National Weather Service Taunton MA 421 AM EST Fri Dec 15 2017 Coastal waters from the Merrimack River MA to Watch Hill RI out to 25 NM ANZ200-152215- 421 AM EST Fri Dec 15 2017 .Synopsis for Massachusetts and Rhode Island coastal waters... High pres moves offshore today. Low pres will develop off the mid Atlc coast this afternoon and track well SE of Nantucket tonight. Another low will track to the north Sat dragging a cold front across the waters. High pressure builds over the waters on Sunday into Monday. 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. $$ ANZ250-152215- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 421 AM EST Fri Dec 15 2017 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 7 AM EST THIS MORNING... .TODAY...W winds 10 to 15 kt with gusts up to 20 kt, becoming SW 5 to 10 kt this afternoon. Seas 2 to 4 ft. .TONIGHT...SW winds 5 to 10 kt, becoming NW 15 to 20 kt with gusts up to 25 kt after midnight. Seas 2 to 4 ft. A chance of snow. Vsby 1 NM or less. .SAT...W winds 15 to 20 kt, increasing to 20 to 25 kt in the afternoon. Gusts up to 30 kt. Seas 3 to 5 ft. .SAT NIGHT...NW winds 20 to 25 kt, diminishing to 15 to 20 kt after midnight. Gusts up to 30 kt. Seas 3 to 5 ft. .SUN...NW winds 10 to 15 kt with gusts up to 20 kt, becoming W 5 to 10 kt in the afternoon. Seas 2 to 3 ft. .SUN NIGHT...W winds 5 to 10 kt. Seas around 2 ft. A chance of snow. Vsby 1 to 3 NM. .MON...W winds 5 to 10 kt. Seas 1 foot or less. A chance of rain and snow. Vsby 1 to 3 NM. .MON NIGHT...W winds 5 to 10 kt. Seas around 2 ft. .TUE...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. A chance of rain. Vsby 1 to 3 NM. .TUE NIGHT...W winds 20 to 25 kt with gusts up to 30 kt. Seas 4 to 6 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ251-152215- Massachusetts Bay and Ipswich Bay- 421 AM EST Fri Dec 15 2017 .TODAY...SW winds 5 to 10 kt. Gusts up to 20 kt this morning. Seas 2 to 3 ft. .TONIGHT...SW winds 5 to 10 kt, becoming W 10 to 15 kt with gusts up to 20 kt after midnight. Seas around 2 ft. A chance of snow. Vsby 1 NM or less. .SAT...W winds 10 to 15 kt, increasing to 15 to 20 kt in the afternoon. Gusts up to 30 kt. Seas 2 to 4 ft. .SAT NIGHT...NW winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 2 to 4 ft. .SUN...W winds 5 to 10 kt. Seas 1 foot or less. .SUN NIGHT...W winds 5 to 10 kt. Seas 1 foot or less. A chance of snow. Vsby 1 to 3 NM. .MON...W winds around 5 kt. Seas 1 foot or less. A chance of rain and snow. Vsby 1 to 3 NM. .MON NIGHT...SW winds 5 to 10 kt. Seas 1 foot or less. .TUE...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. A chance of rain. Vsby 1 to 3 NM. .TUE NIGHT...W winds 15 to 20 kt with gusts up to 30 kt. Seas 2 to 3 ft. A chance of rain. 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. $$ ANZ231-152215- Cape Cod Bay- 421 AM EST Fri Dec 15 2017 .TODAY...SW winds 5 to 10 kt. Seas 2 to 3 ft. .TONIGHT...SW winds 5 to 10 kt, becoming NW 10 to 15 kt with gusts up to 25 kt after midnight. Seas around 2 ft. Snow. Vsby 1 NM or less. .SAT...W winds 15 to 20 kt with gusts up to 30 kt. Seas 3 to 5 ft. .SAT NIGHT...NW winds 15 to 20 kt with gusts up to 30 kt, diminishing to 10 to 15 kt with gusts up to 20 kt after midnight. Seas 2 to 4 ft. .SUN...NW winds 5 to 10 kt. Seas around 2 ft. .SUN NIGHT...W winds 5 to 10 kt. Seas 1 foot or less. A chance of snow. Vsby 1 to 3 NM. .MON...SW winds 5 to 10 kt. Seas 1 foot or less. A chance of rain and snow. Vsby 1 to 3 NM. .MON NIGHT...SW winds 5 to 10 kt. Seas 1 foot or less. .TUE...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. A chance of rain. Vsby 1 to 3 NM. .TUE NIGHT...W winds 15 to 20 kt with gusts up to 30 kt. Seas 2 to 4 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ254-152215- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm- 421 AM EST Fri Dec 15 2017 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 7 AM EST THIS MORNING... .TODAY...W winds 10 to 15 kt, becoming SW 5 to 10 kt this afternoon. Seas 2 to 4 ft. .TONIGHT...W winds 5 to 10 kt, becoming NW 15 to 20 kt with gusts up to 25 kt after midnight. Seas 2 to 4 ft. Snow. Vsby 1 NM or less. .SAT...W winds 15 to 20 kt, increasing to 20 to 25 kt in the afternoon. Gusts up to 30 kt. Seas 4 to 7 ft. .SAT NIGHT...NW winds 20 to 25 kt, diminishing to 15 to 20 kt after midnight. Gusts up to 30 kt. Seas 4 to 7 ft. .SUN...NW winds 5 to 10 kt. Seas 2 to 4 ft. .SUN NIGHT...W winds 5 to 10 kt. Seas 2 to 3 ft. A chance of rain and snow. Vsby 1 to 3 NM. .MON...SW winds 5 to 10 kt. Seas around 2 ft. A chance of rain and snow. Vsby 1 to 3 NM. .MON NIGHT...W winds 5 to 10 kt. Seas 2 to 3 ft. .TUE...SW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. A chance of rain. .TUE NIGHT...W winds 20 to 25 kt with gusts up to 30 kt. Seas 4 to 7 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. $$ ANZ255-152215- Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket- 421 AM EST Fri Dec 15 2017 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 7 AM EST THIS MORNING... .TODAY...W winds 5 to 10 kt, becoming SW this afternoon. Seas 3 to 5 ft. A chance of snow this afternoon. .TONIGHT...NW winds 5 to 10 kt, increasing to 15 to 20 kt with gusts up to 30 kt after midnight. Seas 2 to 4 ft. Snow. Vsby 1 NM or less. .SAT...W winds 20 to 25 kt with gusts up to 35 kt. Seas 6 to 9 ft. .SAT NIGHT...NW winds 20 to 25 kt, diminishing to 15 to 20 kt after midnight. Gusts up to 30 kt. Seas 5 to 8 ft. .SUN...NW winds 5 to 10 kt. Seas 2 to 4 ft. .SUN NIGHT...W winds 5 to 10 kt. Seas 2 to 3 ft. A chance of rain. .MON...SW winds 5 to 10 kt. Seas around 2 ft. A chance of rain. Vsby 1 to 3 NM. .MON NIGHT...W winds 5 to 10 kt. Seas 2 to 3 ft. .TUE...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. A chance of rain. .TUE NIGHT...W winds 20 to 25 kt with gusts up to 35 kt. Seas 5 to 8 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ256-152215- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island- 421 AM EST Fri Dec 15 2017 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 7 AM EST THIS MORNING... .TODAY...W winds 5 to 10 kt, becoming SW this afternoon. Seas 3 to 5 ft. A chance of snow this afternoon with vsby 1 NM or less. .TONIGHT...NW winds 10 to 15 kt, increasing to 15 to 20 kt with gusts up to 30 kt after midnight. Seas 3 to 5 ft. Snow. Vsby 1 NM or less. .SAT...W winds 20 to 25 kt with gusts up to 35 kt. Seas 6 to 9 ft. .SAT NIGHT...NW winds 20 to 25 kt, diminishing to 15 to 20 kt after midnight. Gusts up to 30 kt. Seas 4 to 7 ft. .SUN...NW winds 5 to 10 kt. Seas 2 to 4 ft. .SUN NIGHT...W winds 5 to 10 kt. Seas around 2 ft. A chance of rain. .MON...W winds 5 to 10 kt. Seas around 2 ft. A chance of rain. .MON NIGHT...W winds 5 to 10 kt. Seas 2 to 3 ft. .TUE...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. A chance of rain. .TUE NIGHT...W winds 20 to 25 kt with gusts up to 35 kt. Seas 5 to 8 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. $$ ANZ232-152215- Nantucket Sound- 421 AM EST Fri Dec 15 2017 .TODAY...W winds 5 to 10 kt, becoming SW this afternoon. Seas 2 to 3 ft. A slight chance of snow this afternoon. .TONIGHT...NW winds 5 to 10 kt, increasing to 15 to 20 kt with gusts up to 25 kt after midnight. Seas 2 to 3 ft. Snow. Vsby 1 NM or less. .SAT...W winds 15 to 20 kt with gusts up to 30 kt. Seas 3 to 4 ft. .SAT NIGHT...NW winds 15 to 20 kt with gusts up to 30 kt, diminishing to 10 to 15 kt with gusts up to 20 kt after midnight. Seas 2 to 4 ft. .SUN...NW winds 5 to 10 kt. Seas around 2 ft. .SUN NIGHT...W winds 5 to 10 kt. Seas 1 foot or less. A chance of snow. Vsby 1 to 3 NM. .MON...SW winds 5 to 10 kt. Seas 1 foot or less. A chance of rain and snow. Vsby 1 to 3 NM. .MON NIGHT...W winds 5 to 10 kt. Seas 1 foot or less. .TUE...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. A chance of rain. .TUE NIGHT...W winds 15 to 20 kt with gusts up to 30 kt. Seas 3 to 5 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ233-152215- Vineyard Sound- 421 AM EST Fri Dec 15 2017 .TODAY...W winds 5 to 10 kt, becoming SW this afternoon. Seas 2 to 3 ft. A slight chance of snow this afternoon. .TONIGHT...NW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 25 kt after midnight. Seas 2 to 3 ft. Snow. Vsby 1 NM or less. .SAT...W winds 15 to 20 kt with gusts up to 30 kt. Seas 3 to 5 ft. .SAT NIGHT...NW winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 2 to 4 ft. .SUN...NW winds 5 to 10 kt. Seas around 2 ft. .SUN NIGHT...W winds 5 to 10 kt. Seas 1 foot or less. A chance of snow. Vsby 1 to 3 NM. .MON...SW winds 5 to 10 kt. Seas 1 foot or less. A chance of rain and snow. Vsby 1 to 3 NM. .MON NIGHT...W winds 5 to 10 kt. Seas around 2 ft. .TUE...SW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 3 ft. A chance of rain. .TUE NIGHT...W winds 15 to 20 kt with gusts up to 30 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. $$ ANZ234-152215- Buzzards Bay- 421 AM EST Fri Dec 15 2017 .TODAY...W winds 5 to 10 kt, becoming SW this afternoon. Seas around 2 ft. A slight chance of snow this afternoon. .TONIGHT...NW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 25 kt after midnight. Seas around 2 ft. Snow. Vsby 1 NM or less. .SAT...W winds 15 to 20 kt with gusts up to 30 kt. Seas 2 to 4 ft. .SAT NIGHT...NW winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 2 to 4 ft. .SUN...NW winds 5 to 10 kt. Seas 1 foot or less. .SUN NIGHT...W winds around 5 kt. Seas 1 foot or less. A chance of snow. Vsby 1 to 3 NM. .MON...SW winds 5 to 10 kt. Seas 1 foot or less. A chance of snow. Vsby 1 to 3 NM. .MON NIGHT...W winds 5 to 10 kt. Seas 1 foot or less. .TUE...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. A chance of rain. .TUE NIGHT...W winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ235-152215- Rhode Island Sound- 421 AM EST Fri Dec 15 2017 .TODAY...W winds 5 to 10 kt, becoming SW this afternoon. Seas 2 to 4 ft. A chance of snow this afternoon. .TONIGHT...NW winds 10 to 15 kt, increasing to 15 to 20 kt with gusts up to 25 kt after midnight. Seas 2 to 4 ft. Snow. Vsby 1 NM or less. .SAT...W winds 20 to 25 kt with gusts up to 30 kt. Seas 4 to 6 ft. .SAT NIGHT...NW winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 30 kt. Seas 3 to 5 ft. .SUN...NW winds 5 to 10 kt. Seas around 2 ft. .SUN NIGHT...W winds 5 to 10 kt. Seas 1 foot or less. A chance of rain and snow. Vsby 1 to 3 NM. .MON...SW winds 5 to 10 kt. Seas 1 foot or less. A chance of rain. Vsby 1 to 3 NM. .MON NIGHT...W winds 5 to 10 kt. Seas 2 to 3 ft. .TUE...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. A chance of rain. .TUE NIGHT...W winds 20 to 25 kt with gusts up to 35 kt. Seas 4 to 6 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. $$ ANZ237-152215- Block Island Sound- 421 AM EST Fri Dec 15 2017 .TODAY...NW winds 5 to 10 kt, becoming SW this afternoon. Seas 2 to 3 ft. A chance of snow this afternoon. .TONIGHT...NW winds 10 to 15 kt, increasing to 15 to 20 kt with gusts up to 30 kt after midnight. Seas 2 to 3 ft. Snow. Vsby 1 NM or less. .SAT...W winds 15 to 20 kt with gusts up to 30 kt. Seas 3 to 5 ft. .SAT NIGHT...NW winds 15 to 20 kt with gusts up to 30 kt, diminishing to 10 to 15 kt with gusts up to 20 kt after midnight. Seas 2 to 4 ft. .SUN...NW winds 5 to 10 kt. Seas around 2 ft. .SUN NIGHT...W winds 5 to 10 kt. Seas 1 foot or less. A chance of rain. .MON...W winds 5 to 10 kt. Seas 1 foot or less. A chance of rain. Vsby 1 to 3 NM. .MON NIGHT...W winds 5 to 10 kt. Seas around 2 ft. .TUE...SW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. A chance of rain. .TUE NIGHT...W winds 20 to 25 kt with gusts up to 30 kt. Seas 3 to 5 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ230-152215- Boston Harbor- 421 AM EST Fri Dec 15 2017 .TODAY...SW winds 5 to 10 kt. Waves 1 foot or less. .TONIGHT...W winds 5 to 10 kt. Gusts up to 20 kt after midnight. Waves 1 foot or less. Snow likely. Vsby 1 NM or less. .SAT...W winds 10 to 15 kt with gusts up to 25 kt. Waves around 2 ft. .SAT NIGHT...NW winds 10 to 15 kt with gusts up to 25 kt, diminishing to 5 to 10 kt after midnight. Waves around 2 ft. .SUN...W winds 5 to 10 kt. Waves 1 foot or less. .SUN NIGHT...W winds around 5 kt. Waves 1 foot or less. A chance of snow. Vsby 1 to 3 NM. .MON...W winds around 5 kt. Waves 1 foot or less. A chance of snow. Vsby 1 to 3 NM. .MON NIGHT...SW winds around 5 kt. Waves 1 foot or less. .TUE...SW winds 5 to 10 kt. Waves 1 foot or less. A chance of rain. Vsby 1 to 3 NM. .TUE NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Waves around 2 ft. A chance of rain. 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. $$ ANZ236-152215- Narragansett Bay- 421 AM EST Fri Dec 15 2017 .TODAY...W winds around 5 kt, becoming SW this afternoon. Waves around 2 ft. A slight chance of snow this afternoon. .TONIGHT...NW winds 5 to 10 kt. Gusts up to 25 kt after midnight. Waves around 2 ft. Snow. Vsby 1 NM or less. .SAT...W winds 10 to 15 kt with gusts up to 30 kt. Waves 2 to 3 ft. .SAT NIGHT...NW winds 10 to 15 kt with gusts up to 25 kt, diminishing to 5 to 10 kt after midnight. Waves 2 to 3 ft. .SUN...NW winds 5 to 10 kt. Waves 1 foot or less. .SUN NIGHT...NW winds around 5 kt. Waves 1 foot or less. A chance of snow. Vsby 1 to 3 NM. .MON...SW winds around 5 kt. Waves 1 foot or less. A chance of snow. Vsby 1 to 3 NM. .MON NIGHT...W winds 5 to 10 kt. Waves 1 foot or less. .TUE...SW winds 10 to 15 kt with gusts up to 20 kt. Waves 2 to 3 ft. A chance of rain. .TUE NIGHT...W winds 15 to 20 kt with gusts up to 25 kt. Waves 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ 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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