Coastal Waters Forecast
Issued by NWS Boston, MA

Current Version | Previous Version | Text Only | Print | Product List | Glossary Off
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
000 FZUS51 KBOX 210745 CWFBOX Coastal Waters Forecast National Weather Service Boston/Norton MA 345 AM EDT Fri Sep 21 2018 Coastal waters from the Merrimack River MA to Watch Hill RI out to 25 NM ANZ200-212015- 345 AM EDT Fri Sep 21 2018 .Synopsis for Massachusetts and Rhode Island coastal waters... High pres moves east of the waters today. A cold front will sweep across the waters late tonight and early Sat with pre- frontal gale force S-SW winds tonight. High pres will build east from the Great Lakes this weekend with a reinforcing high pres building over Quebec Mon, which will shift east toward Nova Scotia on Tue. 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. $$ ANZ250-212015- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 345 AM EDT Fri Sep 21 2018 ...GALE WARNING IN EFFECT FROM THIS EVENING THROUGH SATURDAY MORNING... .TODAY...SE winds 5 to 10 kt, becoming S 15 to 20 kt with gusts up to 30 kt this afternoon. Seas 4 to 7 ft. .TONIGHT...S winds 15 to 20 kt, becoming SW 20 to 25 kt after midnight. Gusts up to 40 kt. Seas 5 to 8 ft. A chance of showers. .SAT...W winds 20 to 25 kt with gusts up to 35 kt, becoming N 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 4 to 6 ft. .SAT NIGHT...N winds 5 to 10 kt. Seas 2 to 4 ft. .SUN...N winds 5 to 10 kt. Seas around 2 ft. .SUN NIGHT...N winds 5 to 10 kt, becoming NE 15 to 20 kt with gusts up to 25 kt after midnight. Seas 2 to 4 ft. .MON...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 6 ft. .MON NIGHT...E winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. .TUE...SE winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 6 ft. A chance of showers. .TUE NIGHT...S winds 15 to 20 kt with gusts up to 30 kt. Seas 4 to 6 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ251-212015- Massachusetts Bay and Ipswich Bay- 345 AM EDT Fri Sep 21 2018 ...GALE WARNING IN EFFECT FROM THIS EVENING THROUGH LATE TONIGHT... .TODAY...SE winds 5 to 10 kt, becoming S 15 to 20 kt with gusts up to 25 kt this afternoon. Seas 4 to 6 ft. .TONIGHT...SW winds 15 to 20 kt with gusts up to 35 kt. Seas 4 to 6 ft. A chance of showers. .SAT...NW winds 15 to 20 kt with gusts up to 30 kt, becoming N 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 2 to 4 ft. .SAT NIGHT...N winds 5 to 10 kt. Seas 2 to 3 ft. .SUN...N winds 5 to 10 kt. Seas 1 foot or less. .SUN NIGHT...N winds 5 to 10 kt, becoming NE 15 to 20 kt with gusts up to 25 kt after midnight. Seas 2 to 4 ft. .MON...NE winds 10 to 15 kt with gusts up to 25 kt. Seas 3 to 5 ft. .MON NIGHT...E winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. .TUE...SE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. A chance of showers. .TUE NIGHT...S winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. A chance of showers. 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. $$ ANZ231-212015- Cape Cod Bay- 345 AM EDT Fri Sep 21 2018 ...GALE WARNING IN EFFECT FROM THIS EVENING THROUGH LATE TONIGHT... .TODAY...SE winds 5 to 10 kt, becoming S 10 to 15 kt with gusts up to 25 kt this afternoon. Seas 2 to 3 ft. .TONIGHT...SW winds 15 to 20 kt with gusts up to 35 kt. Seas 3 to 5 ft. A chance of showers. .SAT...W winds 15 to 20 kt with gusts up to 30 kt, becoming N 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 2 to 4 ft. .SAT NIGHT...NE winds 5 to 10 kt. Seas 2 to 3 ft. .SUN...N winds 5 to 10 kt. Seas 1 foot or less. .SUN NIGHT...NE winds around 5 kt, increasing to 10 to 15 kt with gusts up to 20 kt after midnight. Seas 2 to 3 ft. .MON...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. .MON NIGHT...E winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. .TUE...SE winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 3 ft. A chance of showers. .TUE NIGHT...SE winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 3 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ254-212015- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm- 345 AM EDT Fri Sep 21 2018 ...GALE WARNING IN EFFECT FROM THIS EVENING THROUGH SATURDAY MORNING... .TODAY...SE winds 5 to 10 kt, becoming S 10 to 15 kt with gusts up to 25 kt this afternoon. Seas 4 to 6 ft. .TONIGHT...S winds 15 to 20 kt, becoming SW 20 to 25 kt after midnight. Gusts up to 35 kt. Seas 4 to 7 ft. A chance of showers. .SAT...W winds 15 to 20 kt with gusts up to 30 kt, becoming N in the afternoon. Seas 4 to 7 ft. A chance of showers. .SAT NIGHT...NE winds 10 to 15 kt, diminishing to 5 to 10 kt after midnight. Seas 2 to 4 ft. .SUN...N winds 5 to 10 kt. Seas 2 to 3 ft. .SUN NIGHT...N winds 5 to 10 kt, becoming NE 10 to 15 kt with gusts up to 25 kt after midnight. Seas 2 to 4 ft. .MON...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 6 ft. .MON NIGHT...E winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 6 ft. .TUE...E winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 6 ft. A chance of showers. .TUE NIGHT...SE winds 15 to 20 kt with gusts up to 30 kt. Seas 4 to 7 ft. A chance of showers. 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. $$ ANZ255-212015- Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket- 345 AM EDT Fri Sep 21 2018 ...SMALL CRAFT ADVISORY IN EFFECT FROM THIS EVENING THROUGH SATURDAY AFTERNOON... .TODAY...SE winds 5 to 10 kt, becoming S 10 to 15 kt with gusts up to 20 kt this afternoon. Seas 2 to 4 ft. .TONIGHT...S winds 10 to 15 kt, becoming SW 15 to 20 kt after midnight. Gusts up to 30 kt. Seas 3 to 5 ft. A chance of showers. .SAT...W winds 15 to 20 kt with gusts up to 30 kt, becoming N 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 4 to 7 ft. A chance of showers. .SAT NIGHT...NE winds 10 to 15 kt, diminishing to 5 to 10 kt after midnight. Seas 2 to 4 ft. .SUN...NE winds 5 to 10 kt. Seas 2 to 3 ft. .SUN NIGHT...NE winds 5 to 10 kt, increasing to 15 to 20 kt with gusts up to 25 kt after midnight. Seas 2 to 4 ft. .MON...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. .MON NIGHT...E winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 6 ft. .TUE...E winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 6 ft. A chance of showers. .TUE NIGHT...SE winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 7 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ256-212015- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island- 345 AM EDT Fri Sep 21 2018 ...SMALL CRAFT ADVISORY IN EFFECT FROM THIS EVENING THROUGH SATURDAY AFTERNOON... .TODAY...SE winds 5 to 10 kt, becoming S 10 to 15 kt with gusts up to 20 kt this afternoon. Seas 2 to 4 ft. .TONIGHT...SW winds 15 to 20 kt with gusts up to 30 kt. Seas 4 to 7 ft. A chance of showers. .SAT...W winds 15 to 20 kt with gusts up to 30 kt, becoming N 10 to 15 kt in the afternoon. Seas 4 to 6 ft. .SAT NIGHT...NE winds 5 to 10 kt. Seas 2 to 3 ft. .SUN...NE winds 5 to 10 kt. Seas 2 to 3 ft. .SUN NIGHT...NE winds 5 to 10 kt, increasing to 15 to 20 kt with gusts up to 25 kt after midnight. Seas 2 to 4 ft. .MON...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. .MON NIGHT...E winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 6 ft. .TUE...E winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 7 ft. A chance of showers. .TUE NIGHT...S winds 15 to 20 kt with gusts up to 25 kt. Seas 5 to 7 ft. A chance of showers. 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. $$ ANZ232-212015- Nantucket Sound- 345 AM EDT Fri Sep 21 2018 ...SMALL CRAFT ADVISORY IN EFFECT FROM THIS EVENING THROUGH SATURDAY MORNING... .TODAY...SE winds 5 to 10 kt, becoming S 10 to 15 kt with gusts up to 20 kt this afternoon. Seas 2 to 3 ft. .TONIGHT...SW winds 15 to 20 kt with gusts up to 30 kt. Seas 2 to 4 ft. A chance of showers. .SAT...W winds 15 to 20 kt with gusts up to 30 kt, becoming N 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 2 to 4 ft. A chance of showers. .SAT NIGHT...NE winds 10 to 15 kt, diminishing to 5 to 10 kt after midnight. Seas 2 to 3 ft. .SUN...N winds 5 to 10 kt. Seas 1 foot or less. .SUN NIGHT...NE winds around 5 kt, increasing to 10 to 15 kt with gusts up to 20 kt after midnight. Seas 2 to 3 ft. .MON...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. .MON NIGHT...E winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. .TUE...E winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. A chance of showers. .TUE NIGHT...SE winds 15 to 20 kt with gusts up to 30 kt. Seas 2 to 4 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ233-212015- Vineyard Sound- 345 AM EDT Fri Sep 21 2018 ...SMALL CRAFT ADVISORY IN EFFECT FROM THIS EVENING THROUGH SATURDAY MORNING... .TODAY...SE winds 5 to 10 kt, becoming S 10 to 15 kt with gusts up to 20 kt this afternoon. Seas 1 foot or less. .TONIGHT...SW winds 15 to 20 kt with gusts up to 30 kt. Seas 2 to 4 ft. A chance of showers. .SAT...W winds 15 to 20 kt with gusts up to 30 kt, becoming N 10 to 15 kt in the afternoon. Seas 2 to 4 ft. A chance of showers. .SAT NIGHT...NE winds 5 to 10 kt. Seas around 2 ft. .SUN...NE winds 5 to 10 kt. Seas 1 foot or less. .SUN NIGHT...NE winds around 5 kt, increasing to 10 to 15 kt with gusts up to 20 kt after midnight. Seas around 2 ft. .MON...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. .MON NIGHT...E winds around 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. .TUE...E winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 3 ft. A chance of showers. .TUE NIGHT...S winds around 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. A chance of showers. 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. $$ ANZ234-212015- Buzzards Bay- 345 AM EDT Fri Sep 21 2018 ...SMALL CRAFT ADVISORY IN EFFECT FROM THIS EVENING THROUGH SATURDAY MORNING... .TODAY...SE winds 5 to 10 kt, becoming S 10 to 15 kt with gusts up to 20 kt this afternoon. Seas around 2 ft. .TONIGHT...SW winds 15 to 20 kt with gusts up to 30 kt. Seas 3 to 5 ft. A chance of showers. .SAT...W winds 15 to 20 kt with gusts up to 30 kt, becoming N 10 to 15 kt in the afternoon. Seas 2 to 4 ft. .SAT NIGHT...NE winds 5 to 10 kt. Seas 1 foot or less. .SUN...N winds 5 to 10 kt. Seas 1 foot or less. .SUN NIGHT...NE winds around 5 kt, increasing to 10 to 15 kt with gusts up to 20 kt after midnight. Seas around 2 ft. .MON...NE winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. .MON NIGHT...E winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. .TUE...E winds 10 to 15 kt with gusts up to 25 kt. Seas around 2 ft. A chance of showers. .TUE NIGHT...S winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 3 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ235-212015- Rhode Island Sound- 345 AM EDT Fri Sep 21 2018 ...SMALL CRAFT ADVISORY IN EFFECT FROM THIS EVENING THROUGH SATURDAY MORNING... .TODAY...SE winds 5 to 10 kt, becoming S 10 to 15 kt with gusts up to 20 kt this afternoon. Seas 2 to 3 ft. .TONIGHT...S winds 15 to 20 kt, becoming SW 20 to 25 kt after midnight. Gusts up to 30 kt. Seas 3 to 5 ft. A chance of showers. .SAT...W winds 15 to 20 kt with gusts up to 30 kt, becoming N 10 to 15 kt in the afternoon. Seas 3 to 5 ft. .SAT NIGHT...NE winds 5 to 10 kt. Seas 2 to 3 ft. .SUN...NE winds 5 to 10 kt. Seas around 2 ft. .SUN NIGHT...NE winds 5 to 10 kt, increasing to 15 to 20 kt with gusts up to 25 kt after midnight. Seas 2 to 3 ft. .MON...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. .MON NIGHT...E winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. .TUE...E winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. A chance of showers. .TUE NIGHT...S winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. A chance of showers. 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. $$ ANZ237-212015- Block Island Sound- 345 AM EDT Fri Sep 21 2018 ...SMALL CRAFT ADVISORY IN EFFECT FROM THIS EVENING THROUGH SATURDAY MORNING... .TODAY...SE winds 5 to 10 kt, becoming S 10 to 15 kt with gusts up to 20 kt this afternoon. Seas 2 to 3 ft. .TONIGHT...S winds 10 to 15 kt, becoming SW 15 to 20 kt after midnight. Gusts up to 30 kt. Seas 3 to 5 ft. A chance of showers. .SAT...NW winds 15 to 20 kt with gusts up to 25 kt, becoming N 5 to 10 kt in the afternoon. Seas 3 to 5 ft. .SAT NIGHT...NE winds 5 to 10 kt. Seas 2 to 3 ft. .SUN...NE winds 5 to 10 kt. Seas around 2 ft. .SUN NIGHT...NE winds around 5 kt, increasing to 10 to 15 kt with gusts up to 20 kt after midnight. Seas around 2 ft. .MON...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. .MON NIGHT...E winds around 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. .TUE...E winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. A chance of showers. .TUE NIGHT...S winds 10 to 15 kt with gusts up to 25 kt. Seas 3 to 5 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ230-212015- Boston Harbor- 345 AM EDT Fri Sep 21 2018 ...SMALL CRAFT ADVISORY IN EFFECT FROM THIS AFTERNOON THROUGH SATURDAY MORNING... .TODAY...S winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 25 kt this afternoon. Waves around 2 ft. .TONIGHT...SW winds 15 to 20 kt with gusts up to 30 kt. Waves around 2 ft, except 3 to 5 ft at the outer harbor entrance. A chance of showers. .SAT...NW winds 10 to 15 kt, becoming N 5 to 10 kt in the afternoon. Gusts up to 25 kt. Waves around 2 ft. .SAT NIGHT...N winds around 5 kt. Waves 1 foot or less. .SUN...NW winds 5 to 10 kt. Waves 1 foot or less. .SUN NIGHT...N winds 5 to 10 kt. Waves around 2 ft. .MON...NE winds around 10 kt. Waves 2 to 3 ft. .MON NIGHT...E winds 5 to 10 kt. Waves 1 foot or less. .TUE...SE winds 5 to 10 kt. Waves around 2 ft. A chance of showers. .TUE NIGHT...S winds around 10 kt. Waves around 2 ft. Showers likely. 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. $$ ANZ236-212015- Narragansett Bay- 345 AM EDT Fri Sep 21 2018 ...SMALL CRAFT ADVISORY IN EFFECT FROM THIS EVENING THROUGH SATURDAY MORNING... .TODAY...SE winds 5 to 10 kt, becoming S 10 to 15 kt with gusts up to 20 kt this afternoon. Waves 2 to 3 ft. .TONIGHT...S winds 10 to 15 kt, becoming SW 15 to 20 kt after midnight. Gusts up to 30 kt. Waves 2 to 4 ft. A chance of showers. .SAT...NW winds 10 to 15 kt with gusts up to 25 kt, becoming N 5 to 10 kt in the afternoon. Waves 2 to 4 ft. .SAT NIGHT...NE winds 5 to 10 kt. Waves around 2 ft. .SUN...NE winds 5 to 10 kt. Waves 1 foot or less. .SUN NIGHT...NE winds around 5 kt, increasing to 10 to 15 kt with gusts up to 20 kt after midnight. Waves 1 foot or less. .MON...NE winds 10 to 15 kt with gusts up to 20 kt. Waves around 2 ft. .MON NIGHT...E winds 10 to 15 kt with gusts up to 20 kt. Waves around 2 ft. .TUE...E winds 10 to 15 kt with gusts up to 20 kt. Waves 2 to 3 ft. A chance of showers. .TUE NIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Waves 2 to 3 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ 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

USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.