Coastal Waters Forecast
Issued by NWS Boston, MA

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000 FZUS51 KBOX 180747 CWFBOX Coastal Waters Forecast National Weather Service Boston/Norton MA 347 AM EDT Thu Oct 18 2018 Coastal waters from the Merrimack River MA to Watch Hill RI out to 25 NM ANZ200-182015- 347 AM EDT Thu Oct 18 2018 .Synopsis for Massachusetts and Rhode Island coastal waters... Gale force northwest wind gusts will this morning will gradually diminish during the afternoon. A ridge of high pres will build south of the waters Thu night and Fri. Another strong cold front will move across the region late Sat into Sat evening...followed by more gusty NW winds into Sun. A ridge of high pres will build south of the waters Mon. 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. $$ ANZ250-182015- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 347 AM EDT Thu Oct 18 2018 ...GALE WARNING IN EFFECT THROUGH THIS AFTERNOON... .TODAY...NW winds 25 to 30 kt, diminishing to 20 to 25 kt this afternoon. Gusts up to 40 kt. Seas 8 to 9 ft. A slight chance of showers this morning. .TONIGHT...NW winds 20 to 25 kt, becoming W 15 to 20 kt after midnight. Gusts up to 30 kt. Seas 6 to 7 ft. .FRI...W winds 10 to 15 kt, becoming SW 15 to 20 kt in the afternoon. Gusts up to 30 kt. Seas 4 to 5 ft. .FRI NIGHT...SW winds 15 to 20 kt with gusts up to 30 kt. Seas around 5 ft. .SAT...SW winds 15 to 20 kt with gusts up to 30 kt. Seas around 5 ft. A chance of showers. .SAT NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas around 4 ft. A chance of showers in the evening. .SUN...NW winds 15 to 20 kt, increasing to 20 to 25 kt in the afternoon. Gusts up to 30 kt. Seas 6 to 7 ft. .SUN NIGHT...NW winds 20 to 25 kt, diminishing to 15 to 20 kt after midnight. Gusts up to 30 kt. Seas 6 to 7 ft. .MON...NW winds 15 to 20 kt, becoming W 10 to 15 kt in the afternoon. Gusts up to 25 kt. Seas 3 to 4 ft. .MON NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas around 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ251-182015- Massachusetts Bay and Ipswich Bay- 347 AM EDT Thu Oct 18 2018 ...GALE WARNING IN EFFECT UNTIL 2 PM EDT THIS AFTERNOON... .TODAY...NW winds 25 to 30 kt with gusts up to 40 kt, diminishing to 15 to 20 kt with gusts up to 30 kt this afternoon. Seas around 5 ft. .TONIGHT...NW winds 15 to 20 kt with gusts up to 30 kt, becoming W 10 to 15 kt with gusts up to 20 kt after midnight. Seas 3 to 4 ft. .FRI...SW winds 10 to 15 kt with gusts up to 25 kt. Seas around 3 ft. .FRI NIGHT...SW winds 10 to 15 kt with gusts up to 30 kt. Seas around 3 ft. .SAT...SW winds 15 to 20 kt with gusts up to 30 kt. Seas around 3 ft. A chance of showers. .SAT NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. .SUN...NW winds 15 to 20 kt with gusts up to 30 kt. Seas 3 to 4 ft. .SUN NIGHT...NW winds 15 to 20 kt with gusts up to 30 kt. Seas 3 to 4 ft. .MON...W winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. .MON NIGHT...SW winds 5 to 10 kt with 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. $$ ANZ231-182015- Cape Cod Bay- 347 AM EDT Thu Oct 18 2018 ...GALE WARNING IN EFFECT UNTIL 2 PM EDT THIS AFTERNOON... .TODAY...NW winds 25 to 30 kt with gusts up to 40 kt, diminishing to 15 to 20 kt with gusts up to 30 kt this afternoon. Seas 6 to 7 ft. A slight chance of showers this morning. .TONIGHT...NW winds 15 to 20 kt with gusts up to 30 kt, becoming W 10 to 15 kt with gusts up to 20 kt after midnight. Seas around 5 ft, subsiding to 3 ft after midnight. .FRI...SW winds 10 to 15 kt with gusts up to 30 kt. Seas 3 to 4 ft. .FRI NIGHT...SW winds 10 to 15 kt with gusts up to 30 kt. Seas around 4 ft. .SAT...SW winds 15 to 20 kt with gusts up to 30 kt. Seas 4 to 5 ft. A chance of showers. .SAT NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. A chance of showers in the evening. .SUN...NW winds 15 to 20 kt, increasing to 20 to 25 kt in the afternoon. Gusts up to 30 kt. Seas 4 to 5 ft. .SUN NIGHT...NW winds 15 to 20 kt with gusts up to 30 kt. Seas 4 to 5 ft. .MON...W winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. .MON NIGHT...W winds around 10 kt. Gusts up to 20 kt in the evening. Seas around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ254-182015- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm- 347 AM EDT Thu Oct 18 2018 ...GALE WARNING IN EFFECT THROUGH THIS AFTERNOON... .TODAY...NW winds 25 to 30 kt, diminishing to 20 to 25 kt this afternoon. Gusts up to 40 kt, decreasing to 35 kt this afternoon. Seas 9 to 10 ft. A slight chance of showers this morning. .TONIGHT...NW winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 30 kt. Seas 6 to 7 ft. .FRI...W winds 10 to 15 kt, becoming SW 15 to 20 kt in the afternoon. Gusts up to 30 kt. Seas 5 to 6 ft. .FRI NIGHT...SW winds 15 to 20 kt with gusts up to 30 kt. Seas around 6 ft. .SAT...SW winds 15 to 20 kt with gusts up to 30 kt. Seas around 6 ft. A chance of showers. .SAT NIGHT...W winds 10 to 15 kt with gusts up to 25 kt. Seas around 6 ft. A chance of showers in the evening. .SUN...NW winds 15 to 20 kt, increasing to 20 to 25 kt in the afternoon. Gusts up to 30 kt. Seas 7 to 8 ft. .SUN NIGHT...NW winds 20 to 25 kt, diminishing to 15 to 20 kt after midnight. Gusts up to 30 kt. Seas 7 to 8 ft. .MON...NW winds 15 to 20 kt, becoming W 10 to 15 kt in the afternoon. Gusts up to 25 kt. Seas 4 to 5 ft. .MON NIGHT...W winds 10 to 15 kt with gusts up to 20 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. $$ ANZ255-182015- Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket- 347 AM EDT Thu Oct 18 2018 ...GALE WARNING IN EFFECT THROUGH THIS AFTERNOON... .TODAY...NW winds 25 to 30 kt with gusts up to 45 kt, diminishing to 20 to 25 kt with gusts up to 30 kt this afternoon. Seas around 9 ft, subsiding to 7 ft this afternoon. .TONIGHT...NW winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 30 kt. Seas 5 to 6 ft. .FRI...W winds 10 to 15 kt with gusts up to 20 kt, becoming SW 15 to 20 kt with gusts up to 30 kt in the afternoon. Seas around 4 ft, building to 7 ft in the afternoon. .FRI NIGHT...SW winds 15 to 20 kt with gusts up to 30 kt. Seas around 7 ft. .SAT...SW winds 20 to 25 kt with gusts up to 35 kt. Seas around 8 ft. A chance of showers. .SAT NIGHT...NW winds 10 to 15 kt with gusts up to 25 kt. Seas 7 to 8 ft. A chance of showers. .SUN...NW winds 15 to 20 kt, increasing to 20 to 25 kt in the afternoon. Gusts up to 30 kt. Seas around 7 ft. .SUN NIGHT...NW winds 20 to 25 kt, diminishing to 15 to 20 kt after midnight. Gusts up to 30 kt. Seas 6 to 7 ft. .MON...NW winds 15 to 20 kt, becoming W 10 to 15 kt in the afternoon. Seas 4 to 5 ft. .MON NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 5 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ256-182015- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island- 347 AM EDT Thu Oct 18 2018 ...GALE WARNING IN EFFECT THROUGH THIS AFTERNOON... .TODAY...NW winds 25 to 30 kt with gusts up to 40 kt, diminishing to 15 to 20 kt with gusts up to 30 kt this afternoon. Seas around 8 ft, subsiding to 6 ft this afternoon. .TONIGHT...NW winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 30 kt. Seas 4 to 5 ft. .FRI...W winds 10 to 15 kt, becoming SW 15 to 20 kt in the afternoon. Gusts up to 30 kt. Seas around 4 ft, building to 7 ft in the afternoon. .FRI NIGHT...SW winds 20 to 25 kt with gusts up to 30 kt. Seas 7 to 8 ft. .SAT...SW winds 20 to 25 kt with gusts up to 35 kt. Seas 8 to 9 ft. A chance of showers. .SAT NIGHT...NW winds 15 to 20 kt with gusts up to 25 kt. Seas around 8 ft, subsiding to 6 ft after midnight. A chance of showers in the evening. .SUN...NW winds 20 to 25 kt with gusts up to 30 kt. Seas around 7 ft. .SUN NIGHT...NW winds 20 to 25 kt, diminishing to 15 to 20 kt after midnight. Gusts up to 30 kt. Seas 5 to 6 ft. .MON...W winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. .MON NIGHT...W winds 10 to 15 kt with gusts up to 20 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. $$ ANZ232-182015- Nantucket Sound- 347 AM EDT Thu Oct 18 2018 ...GALE WARNING IN EFFECT UNTIL 2 PM EDT THIS AFTERNOON... .TODAY...NW winds 20 to 25 kt with gusts up to 40 kt, diminishing to 15 to 20 kt with gusts up to 30 kt this afternoon. Seas 4 to 5 ft. A slight chance of showers this morning. .TONIGHT...NW winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 25 kt. Seas around 3 ft. .FRI...W winds 10 to 15 kt with gusts up to 20 kt, becoming SW 15 to 20 kt with gusts up to 30 kt in the afternoon. Seas 3 to 4 ft. .FRI NIGHT...SW winds 15 to 20 kt with gusts up to 30 kt. Seas around 4 ft. .SAT...SW winds 20 to 25 kt, diminishing to 15 to 20 kt in the afternoon. Gusts up to 35 kt. Seas around 4 ft. A chance of showers. .SAT NIGHT...NW winds 10 to 15 kt with gusts up to 25 kt. Seas around 4 ft. A chance of showers in the evening. .SUN...NW winds 15 to 20 kt, increasing to 20 to 25 kt in the afternoon. Gusts up to 30 kt. Seas around 4 ft. .SUN NIGHT...NW winds 20 to 25 kt, diminishing to 15 to 20 kt after midnight. Gusts up to 30 kt. Seas 3 to 4 ft. .MON...W winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. .MON NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ233-182015- Vineyard Sound- 347 AM EDT Thu Oct 18 2018 ...GALE WARNING IN EFFECT UNTIL 11 AM EDT THIS MORNING... .TODAY...NW winds 20 to 25 kt with gusts up to 40 kt, diminishing to around 15 kt with gusts up to 30 kt this afternoon. Seas 3 to 4 ft. .TONIGHT...NW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 3 ft. .FRI...W winds 10 to 15 kt, becoming SW 15 to 20 kt in the afternoon. Gusts up to 30 kt. Seas 4 to 5 ft. .FRI NIGHT...SW winds 15 to 20 kt with gusts up to 30 kt. Seas 5 to 6 ft. .SAT...SW winds 20 to 25 kt with gusts up to 35 kt. Seas 5 to 6 ft. A chance of showers. .SAT NIGHT...NW winds 10 to 15 kt with gusts up to 25 kt. Seas 3 to 4 ft. A chance of showers in the evening. .SUN...NW winds 15 to 20 kt with gusts up to 30 kt. Seas around 3 ft. .SUN NIGHT...NW winds 15 to 20 kt with gusts up to 30 kt. Seas around 3 ft. .MON...W winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. .MON NIGHT...W 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. $$ ANZ234-182015- Buzzards Bay- 347 AM EDT Thu Oct 18 2018 ...GALE WARNING IN EFFECT UNTIL 11 AM EDT THIS MORNING... .TODAY...NW winds 15 to 20 kt with gusts up to 35 kt. Seas 3 to 4 ft. .TONIGHT...NW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 3 ft. .FRI...W winds 10 to 15 kt with gusts up to 20 kt, becoming SW 15 to 20 kt with gusts up to 30 kt in the afternoon. Seas 3 to 4 ft. .FRI NIGHT...SW winds 15 to 20 kt with gusts up to 30 kt. Seas around 5 ft. .SAT...SW winds 15 to 20 kt with gusts up to 35 kt. Seas around 5 ft. A chance of showers. .SAT NIGHT...NW winds 10 to 15 kt with gusts up to 25 kt. Seas around 4 ft, subsiding to 2 ft after midnight. A chance of showers in the evening. .SUN...NW winds 15 to 20 kt with gusts up to 30 kt. Seas around 3 ft. .SUN NIGHT...NW winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 30 kt. Seas 2 to 3 ft. .MON...W winds 10 to 15 kt with gusts up to 20 kt. Seas 1 foot or less, then around 2 ft in the afternoon. .MON NIGHT...W winds 5 to 10 kt with gusts up to 20 kt. Seas around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ235-182015- Rhode Island Sound- 347 AM EDT Thu Oct 18 2018 ...GALE WARNING IN EFFECT UNTIL 11 AM EDT THIS MORNING... .TODAY...NW winds 20 to 25 kt with gusts up to 40 kt, diminishing to 15 to 20 kt with gusts up to 30 kt this afternoon. Seas around 6 ft, subsiding to 4 ft this afternoon. .TONIGHT...NW winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 30 kt. Seas 3 to 4 ft. .FRI...W winds 15 to 20 kt with gusts up to 30 kt. Seas around 4 ft, building to 6 ft in the afternoon. .FRI NIGHT...SW winds 20 to 25 kt with gusts up to 30 kt. Seas 6 to 7 ft. .SAT...SW winds 20 to 25 kt with gusts up to 35 kt. Seas around 6 ft. A chance of showers. .SAT NIGHT...W winds 10 to 15 kt, becoming NW 15 to 20 kt after midnight. Gusts up to 25 kt. Seas 5 to 6 ft. A chance of showers in the evening. .SUN...NW winds 15 to 20 kt, increasing to 20 to 25 kt in the afternoon. Gusts up to 30 kt. Seas around 4 ft. .SUN NIGHT...NW winds 15 to 20 kt with gusts up to 30 kt. Seas 3 to 4 ft. .MON...W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. .MON NIGHT...W winds 10 to 15 kt with gusts up to 20 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. $$ ANZ237-182015- Block Island Sound- 347 AM EDT Thu Oct 18 2018 ...GALE WARNING IN EFFECT UNTIL 11 AM EDT THIS MORNING... .TODAY...NW winds 20 to 25 kt with gusts up to 40 kt, diminishing to 15 to 20 kt with gusts up to 30 kt this afternoon. Seas around 5 ft, subsiding to 3 ft this afternoon. .TONIGHT...NW winds 15 to 20 kt with gusts up to 30 kt, diminishing to 10 to 15 kt with gusts up to 20 kt after midnight. Seas 2 to 3 ft. .FRI...W winds 10 to 15 kt with gusts up to 20 kt, becoming SW 15 to 20 kt with gusts up to 30 kt in the afternoon. Seas around 3 ft, building to 5 ft in the afternoon. .FRI NIGHT...SW winds 15 to 20 kt with gusts up to 30 kt. Seas around 6 ft. .SAT...SW winds 20 to 25 kt, diminishing to 15 to 20 kt in the afternoon. Gusts up to 35 kt. Seas around 6 ft. A chance of showers. .SAT NIGHT...W winds 10 to 15 kt, becoming NW 15 to 20 kt after midnight. Gusts up to 25 kt. Seas 4 to 5 ft. A chance of showers in the evening. .SUN...NW winds 15 to 20 kt, increasing to 20 to 25 kt in the afternoon. Gusts up to 30 kt. Seas around 4 ft. .SUN NIGHT...NW winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 30 kt. Seas 3 to 4 ft. .MON...W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. .MON NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ230-182015- Boston Harbor- 347 AM EDT Thu Oct 18 2018 ...GALE WARNING IN EFFECT UNTIL 11 AM EDT THIS MORNING... .TODAY...NW winds 20 to 25 kt, diminishing to 15 to 20 kt this afternoon. Gusts up to 35 kt. Waves around 2 ft. .TONIGHT...W winds 15 to 20 kt with gusts up to 25 kt, diminishing to 5 to 10 kt after midnight. Waves around 2 ft in the evening, then 1 foot or less. .FRI...SW winds 5 to 10 kt with gusts up to 25 kt. Waves around 2 ft. .FRI NIGHT...SW winds 10 to 15 kt with gusts up to 25 kt. Waves around 2 ft. .SAT...SW winds 10 to 15 kt with gusts up to 25 kt. Waves around 2 ft. A chance of showers. .SAT NIGHT...W winds around 10 kt. Gusts up to 20 kt after midnight. Waves 1 foot or less, then around 2 ft after midnight. .SUN...NW winds 10 to 15 kt with gusts up to 25 kt. Waves around 2 ft. .SUN NIGHT...NW winds 10 to 15 kt with gusts up to 25 kt. Waves around 2 ft. .MON...W winds 5 to 10 kt. Waves 1 foot or less. .MON 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. $$ ANZ236-182015- Narragansett Bay- 347 AM EDT Thu Oct 18 2018 ...GALE WARNING IN EFFECT UNTIL 11 AM EDT THIS MORNING... .TODAY...NW winds 15 to 20 kt, diminishing to 10 to 15 kt this afternoon. Gusts up to 35 kt. Waves around 3 ft. .TONIGHT...NW winds 10 to 15 kt, becoming W 5 to 10 kt after midnight. Gusts up to 25 kt. Waves around 3 ft in the evening, then 1 foot or less. .FRI...SW winds 10 to 15 kt with gusts up to 25 kt. Waves 2 to 3 ft. .FRI NIGHT...SW winds 10 to 15 kt with gusts up to 30 kt. Waves around 3 ft. At the bay entrance, waves around 6 ft, subsiding to 4 ft after midnight. .SAT...SW winds 15 to 20 kt with gusts up to 30 kt. Waves around 3 ft. A chance of showers. .SAT NIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Waves 2 to 3 ft. A chance of showers in the evening. .SUN...NW winds 15 to 20 kt with gusts up to 25 kt. Waves around 3 ft. .SUN NIGHT...NW winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 25 kt. Waves 2 to 3 ft. .MON...W winds around 10 kt. Gusts up to 20 kt in the afternoon. Waves 1 foot or less, then around 2 ft in the afternoon. .MON NIGHT...W winds 5 to 10 kt. Gusts up to 20 kt after midnight. Waves around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ 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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