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 180741 AAA CWFBOX Coastal Waters Forecast...UPDATED National Weather Service Boston/Norton MA 341 AM EDT Wed Apr 18 2018 Coastal waters from the Merrimack River MA to Watch Hill RI out to 25 NM ANZ200-182015- 341 AM EDT Wed Apr 18 2018 .Synopsis for Massachusetts and Rhode Island coastal waters... Low pressure departs through the Maritimes today. Brief weak high pres will move over the waters today, followed by another low pressure area approaching from the southwest tonight and passing across the waters Thursday. High pressure will build dry weather over the waters this weekend. 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. $$ ANZ250-182015- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 341 AM EDT Wed Apr 18 2018 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING... .TODAY...W winds 15 to 20 kt, becoming SW 10 to 15 kt this afternoon. Gusts up to 25 kt. Seas 3 to 5 ft. .TONIGHT...W winds 10 to 15 kt with gusts up to 20 kt, becoming SW 5 to 10 kt after midnight. Seas 2 to 4 ft. A chance of rain. .THU...SE winds 5 to 10 kt, becoming NE 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. Patchy fog. Rain. Vsby 1 NM or less. .THU NIGHT...NW winds 10 to 15 kt with gusts up to 25 kt. Seas 3 to 5 ft. Patchy fog. Rain. Vsby 1 to 3 NM. .FRI...NW winds 10 to 15 kt with gusts up to 25 kt. Seas 3 to 5 ft. A chance of showers. .FRI NIGHT...NW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 3 ft. .SAT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. .SAT NIGHT...NW winds 5 to 10 kt. Seas 2 to 3 ft. .SUN...NW winds 5 to 10 kt. Seas 2 to 3 ft. .SUN NIGHT...W winds 5 to 10 kt. Seas around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ251-182015- Massachusetts Bay and Ipswich Bay- 341 AM EDT Wed Apr 18 2018 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 11 AM EDT THIS MORNING... .TODAY...W winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. .TONIGHT...W winds 10 to 15 kt, becoming SW 5 to 10 kt after midnight. Seas around 2 ft. A chance of rain. .THU...E winds 5 to 10 kt, becoming NE with gusts up to 20 kt in the afternoon. Seas around 2 ft. Patchy fog. Rain. Vsby 1 NM or less. .THU NIGHT...N winds 5 to 10 kt, becoming NW 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 2 to 4 ft. Patchy fog. Rain likely. Vsby 1 to 3 NM. .FRI...NW winds 10 to 15 kt, diminishing to 5 to 10 kt in the afternoon. Gusts up to 25 kt. Seas 2 to 4 ft. A chance of showers. .FRI NIGHT...NW winds 5 to 10 kt with gusts up to 25 kt. Seas around 2 ft. .SAT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. .SAT NIGHT...NW winds 5 to 10 kt. Seas 1 foot or less. .SUN...NW winds 5 to 10 kt. Seas 1 foot or less. .SUN NIGHT...W winds 5 to 10 kt. Seas 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. $$ ANZ231-182015- Cape Cod Bay- 341 AM EDT Wed Apr 18 2018 .TODAY...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. .TONIGHT...SW winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt after midnight. Seas around 2 ft. A chance of rain. .THU...E winds 5 to 10 kt, becoming NE with gusts up to 20 kt in the afternoon. Seas around 2 ft. Patchy fog. Rain. Vsby 1 NM or less. .THU NIGHT...NW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. Patchy fog. Rain likely. Vsby 1 to 3 NM. .FRI...NW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. A chance of showers. .FRI NIGHT...NW winds 5 to 10 kt, increasing to 10 to 15 kt after midnight. Gusts up to 25 kt. Seas around 2 ft. .SAT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. .SAT NIGHT...NW winds 5 to 10 kt. Seas 1 foot or less. .SUN...N winds 5 to 10 kt. Seas 1 foot or less. .SUN NIGHT...W winds 5 to 10 kt. Seas 1 foot or less. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ254-182015- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm- 341 AM EDT Wed Apr 18 2018 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT... .TODAY...W winds 15 to 20 kt with gusts up to 30 kt. Seas 4 to 7 ft. .TONIGHT...SW winds 15 to 20 kt with gusts up to 30 kt, diminishing to 5 to 10 kt with gusts up to 20 kt after midnight. Seas 4 to 6 ft. A chance of rain. .THU...SE winds 10 to 15 kt, becoming NE in the afternoon. Gusts up to 25 kt. Seas 3 to 5 ft. Patchy fog. Rain. Vsby 1 NM or less. .THU NIGHT...NW winds 10 to 15 kt with gusts up to 25 kt. Seas 4 to 6 ft. Rain likely. Vsby 1 to 3 NM. .FRI...NW winds 10 to 15 kt with gusts up to 25 kt. Seas 3 to 5 ft. A chance of showers. .FRI NIGHT...NW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. .SAT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. .SAT NIGHT...W winds 5 to 10 kt. Seas 2 to 3 ft. .SUN...NW winds 5 to 10 kt. Seas 2 to 3 ft. .SUN NIGHT...W 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. $$ ANZ255-182015- Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket- 341 AM EDT Wed Apr 18 2018 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT... .TODAY...W winds 15 to 20 kt, increasing to 20 to 25 kt this afternoon. Gusts up to 30 kt. Seas 5 to 8 ft. .TONIGHT...SW winds 15 to 20 kt with gusts up to 30 kt, diminishing to 5 to 10 kt with gusts up to 20 kt after midnight. Seas 4 to 7 ft. A chance of rain. .THU...SE winds 10 to 15 kt, becoming W in the afternoon. Gusts up to 25 kt. Seas 3 to 5 ft. Patchy fog. Rain likely. Vsby 1 NM or less. .THU NIGHT...NW winds 10 to 15 kt, increasing to 15 to 20 kt after midnight. Gusts up to 25 kt. Seas 5 to 8 ft. Patchy fog. A chance of rain. Vsby 1 to 3 NM. .FRI...NW winds 15 to 20 kt, diminishing to 10 to 15 kt in the afternoon. Gusts up to 25 kt. Seas 4 to 7 ft. .FRI NIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. .SAT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. .SAT NIGHT...NW winds 5 to 10 kt. Seas around 2 ft. .SUN...W winds 5 to 10 kt. Seas around 2 ft. .SUN NIGHT...W winds 5 to 10 kt. Seas 1 foot or less. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ256-182015- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island- 341 AM EDT Wed Apr 18 2018 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT... .TODAY...W winds 15 to 20 kt with gusts up to 30 kt. Seas 5 to 8 ft. .TONIGHT...SW winds 15 to 20 kt with gusts up to 25 kt, becoming S 5 to 10 kt after midnight. Seas 4 to 7 ft. Rain likely. .THU...E winds 5 to 10 kt, becoming NW 10 to 15 kt in the afternoon. Gusts up to 25 kt. Seas 4 to 6 ft. Patchy fog. Rain likely. Vsby 1 NM or less. .THU NIGHT...NW winds 15 to 20 kt with gusts up to 30 kt. Seas 5 to 8 ft. Patchy fog. A chance of rain. Vsby 1 to 3 NM. .FRI...NW winds 15 to 20 kt, diminishing to 10 to 15 kt in the afternoon. Gusts up to 30 kt. Seas 4 to 7 ft. .FRI NIGHT...NW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. .SAT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. .SAT NIGHT...NW winds around 10 kt. Seas around 2 ft. .SUN...W winds around 10 kt. Seas around 2 ft. .SUN NIGHT...W 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. $$ ANZ232-182015- Nantucket Sound- 341 AM EDT Wed Apr 18 2018 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING... .TODAY...W winds 15 to 20 kt with gusts up to 30 kt. Seas 2 to 4 ft. .TONIGHT...SW winds 15 to 20 kt with gusts up to 25 kt, diminishing to 5 to 10 kt after midnight. Seas 2 to 4 ft. A chance of rain. .THU...E winds 5 to 10 kt, becoming N with gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. Patchy fog. Rain. Vsby 1 NM or less. .THU NIGHT...NW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. Patchy fog. Rain likely. Vsby 1 to 3 NM. .FRI...NW winds 10 to 15 kt with gusts up to 25 kt, diminishing to 5 to 10 kt in the afternoon. Seas 2 to 4 ft. .FRI NIGHT...NW winds 5 to 10 kt, increasing to 10 to 15 kt after midnight. Gusts up to 20 kt. Seas around 2 ft. .SAT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. .SAT NIGHT...W winds 5 to 10 kt. Seas 1 foot or less. .SUN...W winds 5 to 10 kt. Seas 1 foot or less. .SUN NIGHT...W winds 5 to 10 kt. Seas 1 foot or less. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ233-182015- Vineyard Sound- 341 AM EDT Wed Apr 18 2018 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING... .TODAY...W winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. .TONIGHT...SW winds 15 to 20 kt with gusts up to 25 kt, diminishing to 5 to 10 kt after midnight. Seas 2 to 4 ft. Rain likely. .THU...E winds 5 to 10 kt, becoming N in the afternoon. Seas 2 to 3 ft. Patchy fog. Rain. Vsby 1 to 3 NM. .THU NIGHT...NW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. Patchy fog. Rain likely. Vsby 1 to 3 NM. .FRI...NW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. .FRI NIGHT...NW winds around 10 kt with gusts up to 20 kt. Seas around 2 ft. .SAT...NW winds around 10 kt with gusts up to 20 kt. Seas around 2 ft. .SAT NIGHT...NW winds 5 to 10 kt. Seas 1 foot or less. .SUN...W winds around 10 kt. Seas 1 foot or less. .SUN NIGHT...W winds 5 to 10 kt. Seas 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. $$ ANZ234-182015- Buzzards Bay- 341 AM EDT Wed Apr 18 2018 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING... .TODAY...W winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. .TONIGHT...SW winds 10 to 15 kt with gusts up to 25 kt, diminishing to 5 to 10 kt after midnight. Seas 2 to 4 ft. Rain likely. .THU...E winds 5 to 10 kt, becoming N in the afternoon. Seas 2 to 3 ft. Patchy fog. Rain. Vsby 1 to 3 NM. .THU NIGHT...NW winds 5 to 10 kt, increasing to 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 2 to 3 ft. Patchy fog. Rain likely. Vsby 1 to 3 NM. .FRI...NW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 3 ft. .FRI NIGHT...NW winds 5 to 10 kt with gusts up to 20 kt. Seas around 2 ft. .SAT...NW winds 5 to 10 kt with gusts up to 20 kt. Seas around 2 ft. .SAT NIGHT...NW winds 5 to 10 kt. Seas 1 foot or less. .SUN...W winds 5 to 10 kt. Seas 1 foot or less. .SUN NIGHT...W winds 5 to 10 kt. Seas 1 foot or less. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ235-182015- Rhode Island Sound- 341 AM EDT Wed Apr 18 2018 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING... .TODAY...W winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 6 ft. .TONIGHT...SW winds 15 to 20 kt with gusts up to 25 kt, diminishing to 5 to 10 kt after midnight. Seas 3 to 5 ft. Rain likely. .THU...E winds 5 to 10 kt, becoming N with gusts up to 20 kt in the afternoon. Seas 3 to 5 ft. Patchy fog. Rain. Vsby 1 to 3 NM. .THU NIGHT...NW winds 10 to 15 kt, increasing to 15 to 20 kt after midnight. Gusts up to 25 kt. Seas 4 to 6 ft. Patchy fog. Rain likely. Vsby 1 to 3 NM. .FRI...NW winds 15 to 20 kt, diminishing to 10 to 15 kt in the afternoon. Gusts up to 25 kt. Seas 3 to 5 ft. .FRI NIGHT...NW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 3 ft. .SAT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. .SAT NIGHT...NW winds 5 to 10 kt. Seas 1 foot or less. .SUN...W winds 5 to 10 kt. Seas 1 foot or less. .SUN NIGHT...W winds 5 to 10 kt. Seas 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. $$ ANZ237-182015- Block Island Sound- 341 AM EDT Wed Apr 18 2018 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING... .TODAY...W winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. .TONIGHT...SW winds 10 to 15 kt with gusts up to 25 kt, becoming S 5 to 10 kt after midnight. Seas 2 to 4 ft. Rain likely. .THU...E winds 5 to 10 kt, becoming N with gusts up to 20 kt in the afternoon. Seas 2 to 4 ft. Patchy fog. Rain. Vsby 1 NM or less. .THU NIGHT...NW winds 10 to 15 kt, increasing to 15 to 20 kt after midnight. Gusts up to 30 kt. Seas 3 to 5 ft. Patchy fog. Rain likely. Vsby 1 to 3 NM. .FRI...NW winds 15 to 20 kt with gusts up to 30 kt, diminishing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 3 to 5 ft. .FRI NIGHT...NW winds 10 to 15 kt with gusts up to 25 kt. Seas around 2 ft. .SAT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. .SAT NIGHT...NW winds 5 to 10 kt. Seas 1 foot or less. .SUN...W winds 5 to 10 kt. Seas around 2 ft. .SUN NIGHT...NW winds 5 to 10 kt. Seas around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ230-182015- Boston Harbor- 341 AM EDT Wed Apr 18 2018 .TODAY...W winds 10 to 15 kt with gusts up to 20 kt. Waves 2 to 3 ft. .TONIGHT...SW winds 5 to 10 kt. Gusts up to 20 kt in the evening. Waves 1 foot or less. A chance of rain. .THU...NE winds 5 to 10 kt. Gusts up to 20 kt in the afternoon. Waves 1 foot or less. Patchy fog. Rain. Vsby 1 NM or less. .THU NIGHT...NW winds 5 to 10 kt with gusts up to 25 kt. Waves around 2 ft. Patchy fog. Rain. Vsby 1 to 3 NM. .FRI...NW winds around 10 kt with gusts up to 25 kt. Waves around 2 ft. A chance of showers. .FRI NIGHT...NW winds 5 to 10 kt with gusts up to 25 kt. Waves around 2 ft. .SAT...NW winds 5 to 10 kt with gusts up to 20 kt. Waves around 2 ft. .SAT NIGHT...NW winds 5 to 10 kt. Waves 1 foot or less. .SUN...NW winds around 5 kt. Waves 1 foot or less. .SUN NIGHT...W winds around 5 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. $$ ANZ236-182015- Narragansett Bay- 341 AM EDT Wed Apr 18 2018 .TODAY...W winds 10 to 15 kt with gusts up to 20 kt. Waves 2 to 3 ft. .TONIGHT...SW winds 10 to 15 kt with gusts up to 20 kt, becoming S 5 to 10 kt after midnight. Waves 2 to 3 ft. Rain likely. .THU...E winds 5 to 10 kt, becoming N in the afternoon. Waves around 2 ft. Patchy fog. Rain. Vsby 1 to 3 NM. .THU NIGHT...NW winds 5 to 10 kt, increasing to 10 to 15 kt after midnight. Gusts up to 25 kt. Waves 2 to 3 ft. Rain likely. Vsby 1 to 3 NM. .FRI...NW winds 10 to 15 kt, diminishing to 5 to 10 kt in the afternoon. Gusts up to 25 kt. Waves 2 to 3 ft. .FRI NIGHT...NW winds 5 to 10 kt with gusts up to 25 kt. Waves around 2 ft. .SAT...NW winds 5 to 10 kt with gusts up to 20 kt. Waves around 2 ft. .SAT NIGHT...NW winds 5 to 10 kt. Waves 1 foot or less. .SUN...NW winds around 5 kt. Waves 1 foot or less. .SUN NIGHT...NW winds around 5 kt. Waves 1 foot or less. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ 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.