Coastal Waters Forecast
Issued by NWS Boston, MA

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000 FZUS51 KBOX 180908 CWFBOX Coastal Waters Forecast National Weather Service Boston/Norton MA 408 AM EST Sun Nov 18 2018 Coastal waters from the Merrimack River MA to Watch Hill RI out to 25 NM ANZ200-182215- 408 AM EST Sun Nov 18 2018 .Synopsis for Massachusetts and Rhode Island coastal waters... High pressure over the waters this morning moves off to the east by evening. A couple of low pressure centers move up from the Midwest today and spread light rain across the waters tonight and Monday morning. A cold front then sweeps the rain out to sea by Monday evening. Low pressure passes across the waters Tuesday bringing another chance of rain. High pressure then builds cold and dry weather for Wednesday and Thanksgiving Day. 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. $$ ANZ250-182215- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 408 AM EST Sun Nov 18 2018 .TODAY...NW winds 10 to 15 kt with gusts up to 20 kt, becoming W around 5 kt this afternoon. Seas 2 to 3 ft. .TONIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers in the evening, then showers likely after midnight. .MON...S winds 5 to 10 kt, becoming W in the afternoon. Seas around 4 ft, subsiding to 2 ft in the afternoon. Showers likely, mainly in the morning. .MON NIGHT...N winds 5 to 10 kt. Seas 2 to 3 ft. A chance of rain. .TUE...NE winds 5 to 10 kt, becoming N 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 3 to 4 ft. Rain likely. .TUE NIGHT...NW winds 10 to 15 kt with gusts up to 25 kt. Seas 4 to 5 ft. A chance of rain in the evening. .WED...W winds 10 to 15 kt with gusts up to 25 kt. Seas 4 to 5 ft. .WED NIGHT...W winds 15 to 20 kt, becoming NW 20 to 25 kt after midnight. Gusts up to 30 kt. Seas 4 to 5 ft. .THU...NW winds 20 to 25 kt with gusts up to 30 kt. Seas around 6 ft. .THU NIGHT...NW winds 20 to 25 kt with gusts up to 30 kt. Seas 6 to 7 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ251-182215- Massachusetts Bay and Ipswich Bay- 408 AM EST Sun Nov 18 2018 .TODAY...NW winds 10 to 15 kt, becoming W around 5 kt this afternoon. Seas around 2 ft this morning, then 1 foot or less. .TONIGHT...S winds 5 to 10 kt. Seas 1 foot or less, then around 2 ft after midnight. A chance of showers in the evening, then showers likely after midnight. .MON...SW winds 5 to 10 kt, becoming NW in the afternoon. Seas around 2 ft in the morning, then 1 foot or less. Showers likely, mainly in the morning. .MON NIGHT...N winds 5 to 10 kt. Seas 1 foot or less, then around 2 ft after midnight. A chance of rain. .TUE...N winds 5 to 10 kt. Seas 2 to 3 ft. Rain likely, mainly in the morning. .TUE NIGHT...NW winds 10 to 15 kt with gusts up to 25 kt. Seas around 3 ft. .WED...W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. .WED NIGHT...W winds 15 to 20 kt with gusts up to 25 kt. Seas around 3 ft. .THU...NW winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 4 ft. .THU NIGHT...NW winds 15 to 20 kt with gusts up to 25 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. $$ ANZ231-182215- Cape Cod Bay- 408 AM EST Sun Nov 18 2018 .TODAY...NW winds 5 to 10 kt, becoming W this afternoon. Seas around 2 ft this morning, then 1 foot or less. .TONIGHT...S winds around 5 kt, increasing to 5 to 10 kt after midnight. Seas 1 foot or less. A chance of showers after midnight. .MON...S winds 5 to 10 kt, becoming W in the afternoon. Seas around 2 ft in the morning, then 1 foot or less. A chance of rain in the morning, then a chance of showers in the afternoon. .MON NIGHT...N winds around 5 kt. Seas 1 foot or less. A chance of showers in the evening, then a chance of rain after midnight. .TUE...NE winds 5 to 10 kt. Seas 1 foot or less, then around 2 ft in the afternoon. Rain likely. .TUE NIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. A chance of rain in the evening. .WED...W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. .WED NIGHT...W winds 15 to 20 kt with gusts up to 30 kt. Seas around 3 ft. .THU...NW winds 15 to 20 kt, increasing to 20 to 25 kt in the afternoon. Gusts up to 30 kt. Seas around 4 ft. .THU NIGHT...NW winds 15 to 20 kt with gusts up to 30 kt. Seas around 4 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ254-182215- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm- 408 AM EST Sun Nov 18 2018 .TODAY...N winds 10 to 15 kt, becoming NW around 5 kt this afternoon. Seas 3 to 4 ft. .TONIGHT...S winds 5 to 10 kt. Seas around 2 ft. .MON...SW winds 5 to 10 kt. Seas around 4 ft, subsiding to 2 ft in the afternoon. A chance of rain in the morning, then a chance of showers in the afternoon. .MON NIGHT...N winds 5 to 10 kt. Seas around 3 ft. A chance of showers in the evening, then a chance of rain after midnight. .TUE...E winds 5 to 10 kt, becoming S 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 3 to 4 ft. A chance of rain in the morning, then rain likely in the afternoon. .TUE NIGHT...NW winds 10 to 15 kt with gusts up to 25 kt. Seas 4 to 5 ft. A chance of rain in the evening. .WED...W winds 10 to 15 kt with gusts up to 25 kt. Seas around 5 ft. .WED NIGHT...W winds 15 to 20 kt, becoming NW 20 to 25 kt after midnight. Gusts up to 30 kt. Seas 5 to 6 ft. .THU...NW winds 20 to 25 kt with gusts up to 30 kt. Seas 6 to 7 ft. A chance of snow showers in the afternoon. .THU NIGHT...NW winds 20 to 25 kt with gusts up to 30 kt. Seas around 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. $$ ANZ255-182215- Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket- 408 AM EST Sun Nov 18 2018 .TODAY...N winds 5 to 10 kt, becoming NE this afternoon. Seas around 3 ft. .TONIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. .MON...SW winds 5 to 10 kt. Seas around 3 ft. .MON NIGHT...NW winds 5 to 10 kt. Seas around 3 ft. A chance of rain after midnight. .TUE...SE winds 5 to 10 kt, becoming SW 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 3 to 4 ft. A chance of rain in the morning, then rain likely in the afternoon. .TUE NIGHT...NW winds 10 to 15 kt with gusts up to 25 kt. Seas around 5 ft. A chance of rain in the evening. .WED...W winds 10 to 15 kt with gusts up to 25 kt. Seas around 5 ft. .WED NIGHT...NW winds 15 to 20 kt with gusts up to 25 kt. Seas 5 to 6 ft. .THU...NW winds 15 to 20 kt, increasing to 20 to 25 kt in the afternoon. Gusts up to 30 kt. Seas around 6 ft. .THU NIGHT...NW winds 20 to 25 kt, diminishing to 15 to 20 kt after midnight. Gusts up to 30 kt. Seas around 6 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ256-182215- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island- 408 AM EST Sun Nov 18 2018 .TODAY...N winds 10 to 15 kt, becoming E around 5 kt this afternoon. Seas 2 to 3 ft. .TONIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. .MON...SW winds 5 to 10 kt. Gusts up to 20 kt in the afternoon. Seas 3 to 4 ft. .MON NIGHT...NW winds 5 to 10 kt. Seas around 3 ft. A chance of rain after midnight. .TUE...E winds 5 to 10 kt, becoming NW 15 to 20 kt in the afternoon. Seas 3 to 4 ft. A chance of rain. .TUE NIGHT...NW winds 10 to 15 kt with gusts up to 25 kt. Seas around 4 ft. .WED...NW winds 10 to 15 kt, becoming W 15 to 20 kt in the afternoon. Gusts up to 25 kt. Seas around 4 ft. .WED NIGHT...NW winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 5 ft. .THU...NW winds 15 to 20 kt, increasing to 20 to 25 kt in the afternoon. Gusts up to 30 kt. Seas around 5 ft. .THU NIGHT...NW winds 20 to 25 kt, becoming N 15 to 20 kt after midnight. Gusts up to 30 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. $$ ANZ232-182215- Nantucket Sound- 408 AM EST Sun Nov 18 2018 .TODAY...N winds 5 to 10 kt, becoming E this afternoon. Seas around 2 ft this morning, then 1 foot or less. .TONIGHT...S winds around 5 kt, increasing to 5 to 10 kt after midnight. Seas 1 foot or less, then around 2 ft after midnight. .MON...SW winds 5 to 10 kt. Seas around 2 ft. A chance of rain in the morning, then a chance of showers in the afternoon. .MON NIGHT...N winds 5 to 10 kt. Seas around 2 ft in the evening, then 1 foot or less. A chance of rain after midnight. .TUE...E winds 5 to 10 kt, becoming NE 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas around 2 ft. Rain likely. .TUE NIGHT...NW winds 10 to 15 kt with gusts up to 25 kt. Seas around 3 ft. A chance of rain in the evening. .WED...W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. .WED NIGHT...NW winds 15 to 20 kt with gusts up to 25 kt. Seas around 3 ft. .THU...NW winds 15 to 20 kt, increasing to 20 to 25 kt in the afternoon. Gusts up to 30 kt. Seas around 4 ft. .THU NIGHT...NW winds 15 to 20 kt with gusts up to 30 kt. Seas 3 to 4 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ233-182215- Vineyard Sound- 408 AM EST Sun Nov 18 2018 .TODAY...N winds 5 to 10 kt, becoming E this afternoon. Seas around 2 ft this morning, then 1 foot or less. .TONIGHT...S winds 5 to 10 kt. Seas 1 foot or less, then around 2 ft after midnight. .MON...SW winds 5 to 10 kt. Seas 2 to 3 ft. A chance of rain in the morning, then a chance of showers in the afternoon. .MON NIGHT...N winds 5 to 10 kt. Seas around 2 ft in the evening, then 1 foot or less. A chance of rain after midnight. .TUE...E winds 5 to 10 kt, becoming N 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas around 2 ft. Rain likely. .TUE NIGHT...NW winds 10 to 15 kt with gusts up to 25 kt. Seas around 2 ft. .WED...W winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. .WED NIGHT...NW winds 15 to 20 kt with gusts up to 25 kt. Seas around 3 ft. .THU...NW winds 15 to 20 kt with gusts up to 30 kt. Seas around 3 ft. .THU NIGHT...NW winds 15 to 20 kt with gusts up to 25 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. $$ ANZ234-182215- Buzzards Bay- 408 AM EST Sun Nov 18 2018 .TODAY...N winds 5 to 10 kt, becoming E this afternoon. Seas 1 foot or less. .TONIGHT...S winds 5 to 10 kt. Seas 1 foot or less. A chance of showers after midnight. .MON...SW winds 5 to 10 kt. Seas around 2 ft. A chance of rain in the morning, then a chance of showers in the afternoon. .MON NIGHT...N winds 5 to 10 kt. Seas 1 foot or less. A chance of rain after midnight. .TUE...NE winds 5 to 10 kt, becoming N in the afternoon. Seas 1 foot or less, then around 2 ft in the afternoon. Rain likely. .TUE NIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. .WED...NW winds 5 to 10 kt, becoming W 10 to 15 kt in the afternoon. Gusts up to 20 kt. Seas around 2 ft. .WED NIGHT...W winds 10 to 15 kt, becoming NW 15 to 20 kt after midnight. Gusts up to 25 kt. Seas around 2 ft. .THU...NW winds 15 to 20 kt with gusts up to 25 kt. Seas around 3 ft. .THU NIGHT...NW winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ235-182215- Rhode Island Sound- 408 AM EST Sun Nov 18 2018 .TODAY...N winds 5 to 10 kt, becoming E this afternoon. Seas around 2 ft. .TONIGHT...S winds 5 to 10 kt. Seas around 2 ft. .MON...SW winds 5 to 10 kt. Seas around 4 ft, subsiding to 2 ft in the afternoon. A chance of rain in the morning, then a chance of showers in the afternoon. .MON NIGHT...N winds 5 to 10 kt. Seas around 2 ft. A chance of rain after midnight. .TUE...E winds 5 to 10 kt, becoming NW 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. Rain likely, mainly in the morning. .TUE NIGHT...NW winds 10 to 15 kt with gusts up to 25 kt. Seas around 3 ft. .WED...W winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 3 ft. .WED NIGHT...NW winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 4 ft. .THU...NW winds 15 to 20 kt with gusts up to 30 kt. Seas around 3 ft. .THU NIGHT...NW winds 15 to 20 kt with gusts up to 30 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. $$ ANZ237-182215- Block Island Sound- 408 AM EST Sun Nov 18 2018 .TODAY...N winds 5 to 10 kt, becoming SE this afternoon. Seas around 2 ft. .TONIGHT...S winds 5 to 10 kt. Seas around 2 ft. .MON...W winds 5 to 10 kt. Seas 2 to 3 ft. A chance of rain in the morning, then a chance of showers in the afternoon. .MON NIGHT...N winds 5 to 10 kt. Seas around 2 ft. A chance of rain after midnight. .TUE...E winds 5 to 10 kt, becoming NW 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. Rain likely, mainly in the morning. .TUE NIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. .WED...W winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. .WED NIGHT...NW winds 15 to 20 kt with gusts up to 25 kt. Seas around 3 ft. .THU...NW winds 15 to 20 kt with gusts up to 25 kt. Seas around 3 ft. .THU NIGHT...NW winds 15 to 20 kt, becoming N 10 to 15 kt after midnight. Gusts up to 25 kt. Seas around 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ230-182215- Boston Harbor- 408 AM EST Sun Nov 18 2018 .TODAY...NW winds 5 to 10 kt, becoming W this afternoon. Waves 1 foot or less. .TONIGHT...S winds around 5 kt. Waves 1 foot or less. A chance of rain and snow showers in the evening, then showers likely after midnight. .MON...SW winds around 5 kt, becoming NW in the afternoon. Waves 1 foot or less. Showers likely, mainly in the morning. .MON NIGHT...N winds around 5 kt. Waves 1 foot or less. A chance of rain. .TUE...N winds 5 to 10 kt. Waves 1 foot or less. Rain likely, mainly in the morning. .TUE NIGHT...NW winds around 10 kt. Gusts up to 20 kt after midnight. Waves around 2 ft. .WED...W winds around 10 kt. Waves around 2 ft in the morning, then 1 foot or less. .WED NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Waves around 2 ft. .THU...NW winds 10 to 15 kt with gusts up to 20 kt. Waves around 2 ft. .THU NIGHT...NW winds 10 to 15 kt with gusts up to 20 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. $$ ANZ236-182215- Narragansett Bay- 408 AM EST Sun Nov 18 2018 .TODAY...N winds 5 to 10 kt, becoming E this afternoon. Waves 1 foot or less. .TONIGHT...S winds 5 to 10 kt. Waves 1 foot or less, then around 2 ft after midnight. A chance of showers after midnight. .MON...SW winds 5 to 10 kt, becoming W in the afternoon. Waves 2 to 3 ft. A chance of rain in the morning, then a chance of showers in the afternoon. .MON NIGHT...N winds around 5 kt. Waves around 2 ft. A chance of rain after midnight. .TUE...NE winds 5 to 10 kt, becoming NW in the afternoon. Waves around 2 ft. Rain likely, mainly in the morning. .TUE NIGHT...NW winds 5 to 10 kt. Waves around 2 ft. .WED...W winds 5 to 10 kt. Waves around 2 ft. .WED NIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Waves around 2 ft. .THU...NW winds 10 to 15 kt with gusts up to 20 kt. Waves around 2 ft. .THU NIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Waves around 2 ft in the evening, then 1 foot or less. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ 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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