Coastal Waters Forecast
Issued by NWS Boston, MA

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497 FZUS51 KBOX 171716 CWFBOX Coastal Waters Forecast National Weather Service Boston/Norton MA 116 PM EDT Wed Oct 17 2018 Coastal waters from the Merrimack River MA to Watch Hill RI out to 25 NM ANZ200-180600- 116 PM EDT Wed Oct 17 2018 .Synopsis for Massachusetts and Rhode Island coastal waters... A strong cold front will sweep across the waters late today. This will result in west to northwest gale force wind gusts this afternoon into Thursday. A ridge of high pres will pass 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. 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. $$ ANZ250-180600- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 116 PM EDT Wed Oct 17 2018 ...GALE WARNING IN EFFECT THROUGH THURSDAY AFTERNOON... .THIS AFTERNOON...W winds 15 to 20 kt with gusts up to 35 kt. Seas around 5 ft. Scattered showers. .TONIGHT...NW winds 25 to 35 kt with gusts up to 45 kt. Seas 8 to 9 ft. .THU...NW winds 25 to 35 kt with gusts up to 45 kt. Seas around 11 ft, subsiding to 9 ft in the afternoon. .THU NIGHT...NW winds 20 to 25 kt with gusts up to 35 kt, diminishing to 15 to 20 kt with gusts up to 25 kt after midnight. Seas around 8 ft, subsiding to 5 ft after midnight. .FRI...W winds 10 to 15 kt, becoming SW 15 to 20 kt in the afternoon. Seas around 3 ft. .FRI NIGHT...SW winds 15 to 20 kt with gusts up to 30 kt. Seas 4 to 5 ft. .SAT...SW winds 15 to 20 kt with gusts up to 30 kt. Seas 4 to 5 ft. A chance of showers. .SAT NIGHT...W winds 10 to 15 kt, increasing to 15 to 20 kt after midnight. Gusts up to 25 kt. Seas 4 to 5 ft. .SUN...NW winds 15 to 20 kt, increasing to 20 to 25 kt in the afternoon. Seas around 6 ft. .SUN NIGHT...NW winds 20 to 25 kt, diminishing to 15 to 20 kt after midnight. Seas 5 to 6 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ251-180600- Massachusetts Bay and Ipswich Bay- 116 PM EDT Wed Oct 17 2018 ...GALE WARNING IN EFFECT THROUGH THURSDAY AFTERNOON... .THIS AFTERNOON...W winds 15 to 20 kt with gusts up to 35 kt. Seas around 3 ft. Scattered showers. .TONIGHT...W winds 20 to 25 kt, becoming NW 25 to 30 kt after midnight. Gusts up to 40 kt. Seas 4 to 5 ft. .THU...NW winds 25 to 30 kt, diminishing to 20 to 25 kt in the afternoon. Gusts up to 40 kt. Seas 5 to 6 ft. .THU NIGHT...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 4 ft, subsiding to 2 ft after midnight. .FRI...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. .FRI NIGHT...SW winds 10 to 15 kt, increasing to 15 to 20 kt after midnight. Gusts up to 25 kt. Seas 2 to 3 ft. .SAT...SW winds 10 to 15 kt with gusts up to 25 kt. Seas around 3 ft. A chance of showers. .SAT NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. .SUN...NW winds 15 to 20 kt with gusts up to 25 kt. Seas around 3 ft. .SUN 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. $$ ANZ231-180600- Cape Cod Bay- 116 PM EDT Wed Oct 17 2018 ...GALE WARNING IN EFFECT THROUGH THURSDAY AFTERNOON... .THIS AFTERNOON...W winds 15 to 20 kt with gusts up to 35 kt. Seas around 6 ft. .TONIGHT...W winds 20 to 25 kt, becoming NW 25 to 30 kt after midnight. Gusts up to 45 kt. Seas 6 to 7 ft. .THU...NW winds 25 to 30 kt, diminishing to 20 to 25 kt in the afternoon. Gusts up to 45 kt, decreasing to 40 kt in the afternoon. Seas 7 to 8 ft. .THU NIGHT...NW winds 15 to 20 kt with gusts up to 30 kt, diminishing to 10 to 15 kt with gusts up to 20 kt after midnight. Seas around 6 ft, subsiding to 3 ft after midnight. .FRI...W winds 5 to 10 kt, becoming SW 10 to 15 kt in the afternoon. Gusts up to 25 kt. Seas around 2 ft, building to 4 ft in the afternoon. .FRI NIGHT...SW winds 10 to 15 kt with gusts up to 30 kt. Seas around 4 ft. .SAT...SW winds 10 to 15 kt, increasing to 15 to 20 kt in the afternoon. Gusts up to 30 kt. Seas 4 to 5 ft. A chance of showers. .SAT NIGHT...W winds 10 to 15 kt with gusts up to 25 kt. Seas 3 to 4 ft. A chance of showers in the evening. .SUN...NW winds 15 to 20 kt with gusts up to 25 kt. Seas around 4 ft. .SUN NIGHT...NW winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 3 to 4 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ254-180600- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm- 116 PM EDT Wed Oct 17 2018 ...GALE WARNING IN EFFECT THROUGH THURSDAY AFTERNOON... .THIS AFTERNOON...W winds 20 to 25 kt with gusts up to 40 kt. Seas around 7 ft. .TONIGHT...NW winds 25 to 30 kt with gusts up to 45 kt. Seas 9 to 10 ft. .THU...NW winds 25 to 30 kt with gusts up to 45 kt. Seas 11 to 12 ft. .THU NIGHT...NW winds 20 to 25 kt, diminishing to 15 to 20 kt after midnight. Gusts up to 30 kt. Seas around 9 ft, subsiding to 6 ft after midnight. .FRI...W winds 10 to 15 kt, becoming SW 15 to 20 kt in the afternoon. Gusts up to 25 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 6 ft. A chance of showers. .SAT NIGHT...W winds 10 to 15 kt with gusts up to 25 kt. Seas 5 to 6 ft. A chance of showers in the evening. .SUN...NW winds 15 to 20 kt with gusts up to 25 kt. Seas around 7 ft. .SUN NIGHT...NW winds 15 to 20 kt with gusts up to 25 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. $$ ANZ255-180600- Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket- 116 PM EDT Wed Oct 17 2018 ...GALE WARNING IN EFFECT THROUGH THURSDAY AFTERNOON... .THIS AFTERNOON...W winds 20 to 25 kt with gusts up to 40 kt. Seas around 8 ft. .TONIGHT...W winds 20 to 25 kt, becoming NW 25 to 30 kt after midnight. Gusts up to 45 kt. Seas around 9 ft. .THU...NW winds 25 to 30 kt, diminishing to 20 to 25 kt in the afternoon. Gusts up to 45 kt. Seas around 10 ft, subsiding to 8 ft in the afternoon. .THU NIGHT...NW winds 15 to 20 kt with gusts up to 30 kt. Seas 5 to 6 ft. .FRI...W winds 10 to 15 kt, becoming SW 15 to 20 kt in the afternoon. Gusts up to 25 kt. Seas 4 to 5 ft. .FRI NIGHT...SW winds 15 to 20 kt with gusts up to 30 kt. Seas 6 to 7 ft. A chance of showers after midnight. .SAT...SW winds 15 to 20 kt, increasing to 20 to 25 kt in the afternoon. Gusts up to 35 kt. Seas around 8 ft. A chance of showers in the morning, then showers likely in the afternoon. .SAT NIGHT...W winds 15 to 20 kt with gusts up to 30 kt. Seas 7 to 8 ft. A chance of showers in the evening. .SUN...NW winds 15 to 20 kt with gusts up to 25 kt. Seas around 7 ft. .SUN NIGHT...NW winds 15 to 20 kt with gusts up to 25 kt. Seas 5 to 6 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ256-180600- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island- 116 PM EDT Wed Oct 17 2018 ...GALE WARNING IN EFFECT THROUGH THURSDAY AFTERNOON... .THIS AFTERNOON...W winds 20 to 25 kt with gusts up to 40 kt. Seas around 8 ft. .TONIGHT...NW winds 25 to 30 kt with gusts up to 40 kt. Seas 8 to 9 ft. .THU...NW winds 25 to 30 kt, diminishing to 20 to 25 kt in the afternoon. Gusts up to 40 kt. Seas around 9 ft, subsiding to 6 ft in the afternoon. .THU NIGHT...NW winds 15 to 20 kt with gusts up to 30 kt. Seas 5 to 6 ft. .FRI...W winds 10 to 15 kt, becoming SW 15 to 20 kt in the afternoon. Gusts up to 25 kt. 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 6 to 7 ft. A chance of showers after midnight. .SAT...SW winds 20 to 25 kt with gusts up to 35 kt. Seas around 9 ft. A chance of showers in the morning, then showers likely in the afternoon. .SAT NIGHT...NW winds 15 to 20 kt with gusts up to 30 kt. Seas 7 to 8 ft. A chance of showers in the evening. .SUN...NW winds 15 to 20 kt with gusts up to 25 kt. Seas around 7 ft. .SUN NIGHT...NW winds 15 to 20 kt with gusts up to 25 kt. Seas 5 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. $$ ANZ232-180600- Nantucket Sound- 116 PM EDT Wed Oct 17 2018 ...GALE WARNING IN EFFECT THROUGH THURSDAY AFTERNOON... .THIS AFTERNOON...W winds 20 to 25 kt with gusts up to 35 kt. Seas around 4 ft. .TONIGHT...W winds 20 to 25 kt, becoming NW 25 to 30 kt after midnight. Gusts up to 40 kt. Seas 4 to 5 ft. .THU...NW winds 20 to 25 kt with gusts up to 45 kt, diminishing to 15 to 20 kt with gusts up to 35 kt in the afternoon. Seas 4 to 5 ft. .THU NIGHT...NW winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 30 kt. Seas around 3 ft. .FRI...W winds 10 to 15 kt, becoming SW 15 to 20 kt in the afternoon. Gusts up to 25 kt. Seas 2 to 3 ft. .FRI NIGHT...SW winds 15 to 20 kt with gusts up to 30 kt. Seas around 4 ft. .SAT...SW winds 15 to 20 kt with gusts up to 35 kt. Seas around 4 ft. A chance of showers. .SAT NIGHT...W winds 15 to 20 kt, becoming NW 10 to 15 kt after midnight. Gusts up to 30 kt. Seas 3 to 4 ft. A chance of showers in the evening. .SUN...NW winds 15 to 20 kt with gusts up to 25 kt. Seas around 4 ft. .SUN NIGHT...NW winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ233-180600- Vineyard Sound- 116 PM EDT Wed Oct 17 2018 ...GALE WARNING IN EFFECT THROUGH THURSDAY AFTERNOON... .THIS AFTERNOON...W winds 20 to 25 kt with gusts up to 35 kt. Seas around 6 ft. .TONIGHT...NW winds 20 to 25 kt with gusts up to 40 kt. Seas 4 to 5 ft. .THU...NW winds 20 to 25 kt, diminishing to 15 to 20 kt in the afternoon. Gusts up to 40 kt. Seas 3 to 4 ft. .THU NIGHT...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 25 kt. Seas around 2 ft, building to 4 ft in the afternoon. .FRI NIGHT...SW winds 15 to 20 kt with gusts up to 30 kt. Seas 4 to 5 ft. A chance of showers after midnight. .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 15 to 20 kt, becoming NW 10 to 15 kt after midnight. Gusts up to 30 kt. Seas 3 to 4 ft. A chance of showers in the evening. .SUN...NW winds 15 to 20 kt with gusts up to 25 kt. Seas around 3 ft. .SUN 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. $$ ANZ234-180600- Buzzards Bay- 116 PM EDT Wed Oct 17 2018 ...GALE WARNING IN EFFECT THROUGH THURSDAY AFTERNOON... .THIS AFTERNOON...W winds 15 to 20 kt with gusts up to 35 kt. Seas around 6 ft. .TONIGHT...W winds 15 to 20 kt, becoming NW 20 to 25 kt after midnight. Gusts up to 35 kt. Seas 3 to 4 ft. .THU...NW winds 20 to 25 kt, diminishing to 15 to 20 kt in the afternoon. Gusts up to 35 kt. Seas around 3 ft. .THU NIGHT...NW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 3 ft. .FRI...W winds 10 to 15 kt, becoming SW 15 to 20 kt in the afternoon. Gusts up to 25 kt. Seas around 2 ft, building to 4 ft in the afternoon. .FRI NIGHT...SW winds 10 to 15 kt, increasing to 15 to 20 kt after midnight. Gusts up to 30 kt. Seas 4 to 5 ft. .SAT...SW winds 15 to 20 kt with gusts up to 30 kt. Seas around 5 ft. A chance of showers. .SAT NIGHT...W winds 10 to 15 kt with gusts up to 25 kt. Seas 3 to 4 ft. A chance of showers in the evening. .SUN...NW winds 10 to 15 kt, increasing to 15 to 20 kt in the afternoon. Gusts up to 25 kt. Seas 2 to 3 ft. .SUN NIGHT...NW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ235-180600- Rhode Island Sound- 116 PM EDT Wed Oct 17 2018 ...GALE WARNING IN EFFECT THROUGH THURSDAY AFTERNOON... .THIS AFTERNOON...W winds 20 to 25 kt with gusts up to 35 kt. Seas around 7 ft. .TONIGHT...NW winds 20 to 25 kt, increasing to 25 to 30 kt after midnight. Gusts up to 40 kt. Seas 6 to 7 ft. .THU...NW winds 25 to 30 kt, diminishing to 15 to 20 kt in the afternoon. Gusts up to 40 kt. Seas around 6 ft, subsiding to 4 ft in the afternoon. .THU 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. .FRI...W winds 10 to 15 kt, becoming SW 15 to 20 kt in the afternoon. Gusts up to 25 kt. Seas around 2 ft, building to 4 ft in the afternoon. .FRI NIGHT...SW winds 15 to 20 kt with gusts up to 30 kt. Seas 5 to 6 ft. .SAT...SW winds 15 to 20 kt, increasing to 20 to 25 kt in the afternoon. Gusts up to 35 kt. Seas around 7 ft. A chance of showers. .SAT NIGHT...W winds 15 to 20 kt, becoming NW 10 to 15 kt after midnight. Gusts up to 30 kt. Seas 5 to 6 ft. A chance of showers in the evening. .SUN...NW winds 15 to 20 kt with gusts up to 25 kt. Seas around 4 ft. .SUN NIGHT...NW 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. $$ ANZ237-180600- Block Island Sound- 116 PM EDT Wed Oct 17 2018 ...GALE WARNING IN EFFECT THROUGH THURSDAY AFTERNOON... .THIS AFTERNOON...W winds 20 to 25 kt with gusts up to 35 kt. Seas around 6 ft. .TONIGHT...NW winds 20 to 25 kt with gusts up to 40 kt. Seas 5 to 6 ft. .THU...NW winds 20 to 25 kt, diminishing to 15 to 20 kt in the afternoon. Gusts up to 40 kt. Seas 4 to 5 ft. .THU NIGHT...NW winds 10 to 15 kt. Gusts up to 30 kt. Seas around 4 ft, subsiding to 2 ft after midnight. .FRI...W winds 10 to 15 kt, becoming SW 15 to 20 kt in the afternoon. Gusts up to 25 kt. Seas around 2 ft, building to 4 ft in the afternoon. .FRI NIGHT...SW winds 15 to 20 kt with gusts up to 30 kt. Seas 4 to 5 ft. .SAT...SW winds 15 to 20 kt with gusts up to 30 kt. Seas around 6 ft. A chance of showers. .SAT NIGHT...W winds 15 to 20 kt, becoming NW 10 to 15 kt after midnight. Gusts up to 30 kt. Seas 4 to 5 ft. A chance of showers in the evening. .SUN...NW winds 15 to 20 kt with gusts up to 25 kt. Seas around 4 ft. .SUN NIGHT...NW winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ230-180600- Boston Harbor- 116 PM EDT Wed Oct 17 2018 ...GALE WARNING IN EFFECT THROUGH THURSDAY AFTERNOON... .THIS AFTERNOON...W winds 15 to 20 kt with gusts up to 30 kt. Waves around 2 ft. Scattered showers. .TONIGHT...W winds 15 to 20 kt, becoming NW 20 to 25 kt after midnight. Gusts up to 40 kt. Waves around 2 ft. .THU...NW winds 20 to 25 kt, diminishing to 15 to 20 kt in the afternoon. Gusts up to 40 kt, decreasing to 35 kt in the afternoon. Waves around 2 ft. .THU NIGHT...NW winds 10 to 15 kt, becoming W 5 to 10 kt after midnight. Gusts up to 25 kt. Waves around 2 ft in the evening, then 1 foot or less. .FRI...SW winds 5 to 10 kt. Gusts up to 20 kt in the afternoon. Waves 1 foot or less. .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 with gusts up to 20 kt. Waves 1 foot or less. .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 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. $$ ANZ236-180600- Narragansett Bay- 116 PM EDT Wed Oct 17 2018 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH THURSDAY EVENING... .THIS AFTERNOON...W winds 15 to 20 kt with gusts up to 30 kt. Waves around 4 ft. .TONIGHT...NW winds 15 to 20 kt with gusts up to 30 kt. Waves around 3 ft. .THU...NW winds 15 to 20 kt, diminishing to 10 to 15 kt in the afternoon. Gusts up to 35 kt. Waves around 3 ft. .THU NIGHT...NW winds 10 to 15 kt, diminishing to 5 to 10 kt after midnight. Gusts up to 25 kt. Waves around 3 ft in the evening, then 1 foot or less. .FRI...SW winds 10 to 15 kt with gusts up to 25 kt. Waves 1 foot or less, then around 2 ft in the afternoon. .FRI NIGHT...SW winds 10 to 15 kt with gusts up to 30 kt. Waves around 3 ft. .SAT...SW winds 15 to 20 kt with gusts up to 30 kt. Waves around 4 ft. A chance of showers. .SAT NIGHT...W winds 10 to 15 kt with gusts up to 25 kt. Waves around 3 ft. .SUN...NW winds 10 to 15 kt, increasing to 15 to 20 kt in the afternoon. Gusts up to 25 kt. Waves around 2 ft. .SUN NIGHT...NW winds 10 to 15 kt with gusts up to 25 kt. Waves around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ 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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