Coastal Waters Forecast
Issued by NWS Boston, MA

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943 FZUS51 KBOX 230445 CWFBOX Coastal Waters Forecast for Massachusetts and Rhode Island National Weather Service Boston/Norton MA 1245 AM EDT Fri Apr 23 2021 Coastal waters from the Merrimack River MA to Watch Hill RI out to 25 NM ANZ200-231700- 1245 AM EDT Fri Apr 23 2021 .Synopsis for Massachusetts and Rhode Island coastal waters... Winds slowly subside into Fri and Sat as high pres builds south of the waters. Low pres from the mid Atlc coast will lift NE across the waters Sun, then move to the Maritimes Mon. Ridge builds in behind the departing low pressure early next week. For additional information on possible hazardous weather for the week ahead, please visit www.weather.gov/boston/ehwo $$ ANZ250-231700- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 1245 AM EDT Fri Apr 23 2021 ...GALE WARNING IN EFFECT UNTIL NOON EDT TODAY... .REST OF TONIGHT...W winds 25 to 30 kt with gusts up to 35 kt. Seas 5 to 7 ft. .FRI...W winds 25 to 30 kt, diminishing to 20 to 25 kt in the afternoon. Seas 4 to 7 ft. .FRI NIGHT...W winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 4 ft. .SAT...SW winds 10 to 15 kt. Gusts up to 20 kt in the morning. Seas 2 to 4 ft. .SAT NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. .SUN...SE winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. Showers. .SUN NIGHT...N winds 10 to 15 kt, becoming NW 15 to 20 kt after midnight. Gusts up to 30 kt. Seas 4 to 7 ft. Showers likely. .MON AND MON NIGHT...NW winds 15 to 20 kt, diminishing to 10 to 15 kt. Gusts up to 30 kt. Seas 4 to 7 ft. .TUE AND TUE NIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ251-231700- Massachusetts Bay and Ipswich Bay- 1245 AM EDT Fri Apr 23 2021 ...GALE WARNING IN EFFECT UNTIL NOON EDT TODAY... .REST OF TONIGHT...W winds 20 to 25 kt with gusts up to 35 kt. Seas 3 to 4 ft. .FRI...W winds 20 to 25 kt, diminishing to 15 to 20 kt in the afternoon. Gusts up to 35 kt. Seas 2 to 4 ft. .FRI NIGHT...W winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 2 to 3 ft. .SAT...W winds 10 to 15 kt. Seas 2 to 3 ft. .SAT NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. A chance of showers. .SUN AND SUN NIGHT...NW winds 10 to 15 kt with gusts up to 30 kt. Seas 2 to 4 ft. Showers. .MON AND MON NIGHT...NW winds 15 to 20 kt, diminishing to 10 to 15 kt. Gusts up to 30 kt. Seas 2 to 4 ft. .TUE AND TUE NIGHT...SW winds 5 to 10 kt. Gusts up to 20 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. $$ ANZ231-231700- Cape Cod Bay- 1245 AM EDT Fri Apr 23 2021 ...GALE WARNING IN EFFECT UNTIL 2 AM EDT EARLY THIS MORNING... .REST OF TONIGHT...W winds 20 to 25 kt with gusts up to 35 kt. Seas 3 to 5 ft. .FRI...W winds 20 to 25 kt, diminishing to 15 to 20 kt in the afternoon. Gusts up to 30 kt. Seas 3 to 5 ft. .FRI NIGHT...W winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 3 ft. .SAT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. .SAT NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt, becoming S 5 to 10 kt after midnight. Seas around 2 ft. A chance of showers. .SUN...SE winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 3 ft. Showers. .SUN NIGHT...N winds 10 to 15 kt, becoming NW 15 to 20 kt after midnight. Gusts up to 30 kt. Seas 3 to 5 ft. A chance of showers. .MON AND MON NIGHT...NW winds 15 to 20 kt with gusts up to 30 kt, diminishing to 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. .TUE AND TUE NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ254-231700- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm- 1245 AM EDT Fri Apr 23 2021 ...GALE WARNING IN EFFECT UNTIL NOON EDT TODAY... .REST OF TONIGHT...W winds 25 to 30 kt with gusts up to 35 kt. Seas 5 to 8 ft. .FRI...W winds 20 to 25 kt with gusts up to 35 kt. Seas 5 to 8 ft. .FRI NIGHT...W winds 20 to 25 kt with gusts up to 35 kt, diminishing to around 15 kt with gusts up to 20 kt after midnight. Seas 4 to 7 ft. .SAT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. .SAT NIGHT...SW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. .SUN...SE winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. Showers. .SUN NIGHT...SW winds around 15 kt, becoming NW after midnight. Gusts up to 30 kt. Seas 5 to 8 ft. A chance of showers. .MON...NW winds 15 to 20 kt with gusts up to 30 kt. Seas 5 to 8 ft. .MON NIGHT...NW winds 10 to 15 kt with gusts up to 25 kt. Seas 4 to 7 ft. .TUE AND TUE NIGHT...W winds 10 to 15 kt with gusts up to 20 kt, becoming SW. 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. $$ ANZ255-231700- Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket- 1245 AM EDT Fri Apr 23 2021 ...GALE WARNING IN EFFECT UNTIL 2 AM EDT EARLY THIS MORNING... .REST OF TONIGHT...W winds around 25 kt with gusts up to 30 kt. Seas 6 to 9 ft. .FRI...W winds around 25 kt with gusts up to 35 kt. Seas 7 to 9 ft. .FRI NIGHT...W winds 20 to 25 kt with gusts up to 35 kt, diminishing to around 15 kt with gusts up to 20 kt after midnight. Seas 5 to 8 ft. .SAT...W winds around 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. .SAT NIGHT...S winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas 2 to 4 ft. A chance of showers. .SUN...SE winds 15 to 20 kt with gusts up to 30 kt. Seas 4 to 6 ft. Showers. .SUN NIGHT...NW winds 15 to 20 kt with gusts up to 30 kt. Seas 6 to 9 ft. A chance of showers. .MON...NW winds 15 to 20 kt with gusts up to 30 kt. Seas 5 to 8 ft. .MON NIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 6 ft. .TUE...W winds around 10 kt. Seas 2 to 4 ft. .TUE NIGHT...SW winds 10 to 15 kt. Seas around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ256-231700- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island- 1245 AM EDT Fri Apr 23 2021 ...GALE WARNING IN EFFECT UNTIL 2 AM EDT EARLY THIS MORNING... .REST OF TONIGHT...W winds around 25 kt with gusts up to 30 kt. Seas 6 to 8 ft. .FRI...W winds 20 to 25 kt with gusts up to 35 kt. Seas 6 to 8 ft. .FRI NIGHT...SW winds 20 to 25 kt with gusts up to 30 kt, becoming W around 15 kt with gusts up to 20 kt after midnight. Seas 5 to 8 ft. .SAT...W winds around 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. .SAT NIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Showers. .SUN...E winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 6 ft. Showers. .SUN NIGHT...NW winds 15 to 20 kt with gusts up to 30 kt. Seas 6 to 8 ft. A chance of showers. .MON...NW winds 15 to 20 kt with gusts up to 30 kt. Seas 5 to 7 ft. .MON NIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. .TUE AND TUE NIGHT...SW winds 10 to 15 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. $$ ANZ232-231700- Nantucket Sound- 1245 AM EDT Fri Apr 23 2021 ...GALE WARNING IN EFFECT UNTIL 2 AM EDT EARLY THIS MORNING... .REST OF TONIGHT...W winds 20 to 25 kt with gusts up to 35 kt. Seas 3 to 5 ft. .FRI...W winds 20 to 25 kt with gusts up to 35 kt. Seas 3 to 5 ft. .FRI NIGHT...W winds 20 to 25 kt with gusts up to 30 kt, diminishing to 10 to 15 kt with gusts up to 20 kt after midnight. Seas 2 to 4 ft. .SAT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. .SAT NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt, becoming S 5 to 10 kt after midnight. Seas 2 to 3 ft. A chance of showers. .SUN...SE winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. Showers. .SUN NIGHT...N winds 10 to 15 kt, becoming NW 15 to 20 kt after midnight. Gusts up to 30 kt. Seas 3 to 5 ft. A chance of showers. .MON...NW winds 15 to 20 kt with gusts up to 30 kt. Seas 3 to 5 ft. .MON NIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. .TUE AND TUE NIGHT...SW winds around 10 kt. Seas around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ233-231700- Vineyard Sound- 1245 AM EDT Fri Apr 23 2021 ...GALE WARNING IN EFFECT UNTIL 2 AM EDT EARLY THIS MORNING... .REST OF TONIGHT...W winds 20 to 25 kt with gusts up to 30 kt. Seas 3 to 5 ft. .FRI...W winds 20 to 25 kt with gusts up to 30 kt. Seas 3 to 5 ft. .FRI NIGHT...W winds 15 to 20 kt with gusts up to 30 kt, diminishing to 10 to 15 kt after midnight. Seas 2 to 4 ft. .SAT...SW winds 10 to 15 kt. 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, becoming S 5 to 10 kt after midnight. Seas 2 to 3 ft. Showers likely. .SUN...E winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. Showers. .SUN NIGHT...N winds 10 to 15 kt, becoming NW 15 to 20 kt after midnight. Gusts up to 25 kt. Seas 3 to 4 ft. A chance of showers. .MON AND MON NIGHT...NW winds 15 to 20 kt with gusts up to 30 kt, diminishing to around 10 kt with gusts up to 20 kt. Seas 2 to 4 ft. .TUE AND TUE NIGHT...SW winds 5 to 10 kt. Seas around 2 ft, 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. $$ ANZ234-231700- Buzzards Bay- 1245 AM EDT Fri Apr 23 2021 ...GALE WARNING IN EFFECT UNTIL 2 AM EDT EARLY THIS MORNING... .REST OF TONIGHT...W winds 15 to 20 kt with gusts up to 30 kt. Seas 3 to 5 ft. .FRI...W winds 15 to 20 kt with gusts up to 30 kt. Seas 3 to 5 ft. .FRI NIGHT...W winds 15 to 20 kt with gusts up to 25 kt, diminishing to around 10 kt after midnight. Seas 2 to 4 ft. .SAT...SW winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Seas around 2 ft. .SAT NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt, becoming S 5 to 10 kt after midnight. Seas around 2 ft. A chance of showers. .SUN...SE winds 10 to 15 kt, becoming E in the afternoon. Gusts up to 25 kt. Seas 2 to 3 ft. Showers. .SUN NIGHT...NW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 3 ft. A chance of showers. .MON THROUGH TUE NIGHT...SW winds 10 to 15 kt with gusts up to 30 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ235-231700- Rhode Island Sound- 1245 AM EDT Fri Apr 23 2021 ...GALE WARNING IN EFFECT UNTIL 2 AM EDT EARLY THIS MORNING... .REST OF TONIGHT...W winds 20 to 25 kt with gusts up to 30 kt. Seas 4 to 6 ft. .FRI...W winds 20 to 25 kt with gusts up to 30 kt. Seas 4 to 7 ft. .FRI NIGHT...W winds 15 to 20 kt with gusts up to 30 kt, diminishing to 10 to 15 kt after midnight. Seas 4 to 6 ft. .SAT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. .SAT NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt, becoming S 5 to 10 kt after midnight. Seas 2 to 3 ft. Showers likely. .SUN...SE winds 15 to 20 kt, becoming E in the afternoon. Gusts up to 25 kt. Seas 2 to 4 ft. Showers. .SUN NIGHT...NW winds 15 to 20 kt with gusts up to 30 kt. Seas 4 to 6 ft. A chance of showers. .MON...NW winds 15 to 20 kt with gusts up to 30 kt. Seas 3 to 5 ft. .MON NIGHT THROUGH TUE 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. $$ ANZ237-231700- Block Island Sound- 1245 AM EDT Fri Apr 23 2021 ...GALE WARNING IN EFFECT UNTIL 2 AM EDT EARLY THIS MORNING... .REST OF TONIGHT...W winds 20 to 25 kt with gusts up to 30 kt. Seas 3 to 5 ft. .FRI...W winds 20 to 25 kt with gusts up to 30 kt. Seas 3 to 5 ft. .FRI NIGHT...W winds 15 to 20 kt with gusts up to 25 kt, diminishing to 10 to 15 kt after midnight. Seas 3 to 5 ft. .SAT...SW winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. .SAT NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt, becoming S 5 to 10 kt after midnight. Seas 2 to 3 ft. Showers. .SUN...SE winds 15 to 20 kt, becoming NE in the afternoon. Gusts up to 25 kt. Seas 2 to 4 ft. Showers. .SUN NIGHT...NW winds 15 to 20 kt with gusts up to 30 kt. Seas 3 to 5 ft. A chance of showers. .MON...NW winds 15 to 20 kt with gusts up to 30 kt. Seas 3 to 5 ft. .MON NIGHT THROUGH TUE NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ230-231700- Boston Harbor- 1245 AM EDT Fri Apr 23 2021 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING... .REST OF TONIGHT...W winds 15 to 20 kt with gusts up to 30 kt. Waves around 2 ft. .FRI...W winds around 20 kt with gusts up to 30 kt. Waves around 2 ft. .FRI NIGHT...W winds 15 to 20 kt with gusts up to 25 kt, diminishing to 10 to 15 kt after midnight. Waves around 2 ft. .SAT...W winds around 10 kt. Waves 1 foot or less. .SAT NIGHT...SW winds 5 to 10 kt. Waves 1 foot or less. A chance of showers. .SUN AND SUN NIGHT...NW winds 10 to 15 kt with gusts up to 25 kt. Waves around 2 ft. Showers. .MON THROUGH TUE NIGHT...SW winds 10 to 15 kt with gusts up to 30 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. $$ ANZ236-231700- Narragansett Bay- 1245 AM EDT Fri Apr 23 2021 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING... .REST OF TONIGHT...W winds around 15 kt with gusts up to 30 kt. Waves around 3 ft. .FRI...W winds 15 to 20 kt with gusts up to 30 kt. Waves 2 to 4 ft. .FRI NIGHT...W winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt after midnight. Waves 2 to 3 ft. .SAT...W winds 5 to 10 kt, becoming SW 10 to 15 kt with gusts up to 20 kt in the afternoon. Waves 2 to 3 ft. .SAT NIGHT...S winds 5 to 10 kt. Gusts up to 20 kt in the evening. Waves around 2 ft. Showers likely. .SUN...SE winds 10 to 15 kt, becoming NE in the afternoon. Gusts up to 20 kt. Waves 2 to 3 ft. Showers. .SUN NIGHT...NW winds 10 to 15 kt with gusts up to 25 kt. Waves 2 to 3 ft. A chance of showers. .MON THROUGH TUE NIGHT...SW winds 10 to 15 kt with gusts up to 25 kt. Waves 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ 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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