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 191116 CWFBOX Coastal Waters Forecast National Weather Service Boston/Norton MA 716 AM EDT Sat May 19 2018 Coastal waters from the Merrimack River MA to Watch Hill RI out to 25 NM ANZ200-200000- 716 AM EDT Sat May 19 2018 .Synopsis for Massachusetts and Rhode Island coastal waters... A warm front will move N across the waters today. Expecting steady rainfall to limit vsbys. A passing cold front Sun afternoon could trigger a thunderstorm or two across the nearshore waters. Dry weather returns on Mon. A low pres passing by Tue into Wed could produce some showers. 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. $$ ANZ250-200000- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 716 AM EDT Sat May 19 2018 ...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH SUNDAY AFTERNOON... .TODAY...E winds 10 to 15 kt. Gusts up to 20 kt this morning. Seas 2 to 4 ft. A slight chance of rain this morning, then rain this afternoon. Patchy fog this afternoon with vsby 1 to 3 NM. .TONIGHT...S winds 10 to 15 kt. Gusts up to 20 kt, increasing to 30 kt after midnight. Seas 3 to 5 ft. Patchy fog. A chance of rain. Vsby 1 NM or less. .SUN...SW winds 15 to 20 kt with gusts up to 30 kt. Seas 3 to 5 ft. Patchy fog. A chance of showers. Vsby 1 NM or less. .SUN NIGHT...NW winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt after midnight. Seas 2 to 4 ft. .MON...W winds around 5 kt, becoming SW in the afternoon. Seas 2 to 3 ft. .MON NIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Seas 2 to 3 ft. .TUE...SE winds 5 to 10 kt. Seas 2 to 3 ft. .TUE NIGHT...S winds 10 to 15 kt. Seas 2 to 4 ft. A chance of showers. .WED...SW winds 5 to 10 kt. Seas 2 to 4 ft. A chance of showers. .WED NIGHT...N winds 5 to 10 kt with gusts up to 20 kt. Seas 3 to 5 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ251-200000- Massachusetts Bay and Ipswich Bay- 716 AM EDT Sat May 19 2018 ...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH SUNDAY MORNING... .TODAY...E winds 10 to 15 kt. Seas 2 to 3 ft. A slight chance of rain this morning, then rain this afternoon. Patchy fog this afternoon with vsby 1 to 3 NM. .TONIGHT...S winds 10 to 15 kt. Gusts up to 30 kt after midnight. Seas 2 to 4 ft. Patchy fog. Rain likely. Vsby 1 NM or less. .SUN...SW winds 10 to 15 kt with gusts up to 30 kt. Seas 2 to 4 ft. Patchy fog. Showers likely. Vsby 1 NM or less. .SUN NIGHT...NW winds 5 to 10 kt. Seas 2 to 3 ft. .MON...W winds around 5 kt, becoming SW in the afternoon. Seas around 2 ft. .MON NIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Seas around 2 ft. .TUE...SE winds 5 to 10 kt. Seas around 2 ft. .TUE NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers. .WED...W winds around 5 kt. Seas 2 to 3 ft. A chance of showers. .WED NIGHT...N winds 5 to 10 kt. Seas 2 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. $$ ANZ231-200000- Cape Cod Bay- 716 AM EDT Sat May 19 2018 ...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH SUNDAY AFTERNOON... .TODAY...E winds 5 to 10 kt. Gusts up to 20 kt this morning. Seas around 2 ft. A slight chance of rain this morning, then rain this afternoon. Patchy fog this afternoon with vsby 1 to 3 NM. .TONIGHT...S winds 5 to 10 kt, becoming SW 10 to 15 kt with gusts up to 30 kt after midnight. Seas 2 to 4 ft. Patchy fog. Rain likely. Vsby 1 NM or less. .SUN...SW winds 15 to 20 kt with gusts up to 30 kt. Seas 2 to 4 ft. Patchy fog. A chance of showers. Vsby 1 NM or less. .SUN NIGHT...NW winds 5 to 10 kt. Seas around 2 ft. A chance of showers. .MON...NW winds around 5 kt, becoming SW in the afternoon. Seas 1 foot or less. .MON NIGHT...SW winds 5 to 10 kt, becoming W after midnight. Seas 1 foot or less. .TUE...SE winds 5 to 10 kt. Seas 1 foot or less. .TUE NIGHT...S winds 5 to 10 kt. Seas 1 foot or less. A chance of showers. .WED...SW winds 5 to 10 kt. Seas 1 foot or less. A chance of showers. .WED NIGHT...NW winds 5 to 10 kt with gusts up to 20 kt. Seas 2 to 4 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ254-200000- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm- 716 AM EDT Sat May 19 2018 ...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH SUNDAY AFTERNOON... .TODAY...E winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. Patchy fog. A slight chance of rain this morning, then rain this afternoon. Vsby 1 NM or less. .TONIGHT...S winds 10 to 15 kt. Gusts up to 30 kt after midnight. Seas 4 to 6 ft. Patchy fog. A chance of rain. Vsby 1 NM or less. .SUN...SW winds 15 to 20 kt with gusts up to 30 kt. Seas 4 to 7 ft. Patchy fog. A chance of showers. Vsby 1 NM or less. .SUN NIGHT...W winds 10 to 15 kt with gusts up to 25 kt, becoming NW 5 to 10 kt after midnight. Seas 3 to 5 ft. Patchy fog. A chance of showers. Vsby 1 to 3 NM. .MON...NW winds around 5 kt, becoming SW in the afternoon. Seas 2 to 4 ft. .MON NIGHT...SW winds 5 to 10 kt. Seas 2 to 4 ft. .TUE...S winds 5 to 10 kt. Seas 2 to 3 ft. .TUE NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers. .WED...SW winds 5 to 10 kt. Seas 2 to 4 ft. A chance of showers. .WED NIGHT...NW winds 5 to 10 kt with gusts up to 20 kt. Seas 3 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. $$ ANZ255-200000- Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket- 716 AM EDT Sat May 19 2018 ...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH SUNDAY AFTERNOON... .TODAY...E winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. Patchy fog. A chance of rain this morning, then rain likely this afternoon. Vsby 1 NM or less. .TONIGHT...S winds 10 to 15 kt with gusts up to 20 kt, becoming SW 15 to 20 kt with gusts up to 30 kt after midnight. Seas 4 to 6 ft. Patchy dense fog. A chance of rain. Vsby 1 NM or less. .SUN...SW winds 15 to 20 kt with gusts up to 30 kt. Seas 5 to 8 ft. Patchy fog. A chance of showers. Vsby 1 NM or less. .SUN NIGHT...W winds 10 to 15 kt with gusts up to 25 kt, becoming NW 5 to 10 kt after midnight. Seas 4 to 7 ft. Patchy fog. .MON...N winds around 5 kt, becoming SW in the afternoon. Seas 3 to 5 ft. .MON NIGHT...SW winds 5 to 10 kt. Seas 2 to 4 ft. .TUE...SE winds 5 to 10 kt. Seas 2 to 3 ft. .TUE NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers. .WED...W winds 5 to 10 kt. Seas 2 to 4 ft. A chance of showers. .WED NIGHT...NW winds around 10 kt with gusts up to 25 kt. Seas 3 to 5 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ256-200000- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island- 716 AM EDT Sat May 19 2018 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 PM EDT THIS AFTERNOON... .TODAY...E winds 10 to 15 kt with gusts up to 25 kt. Seas 3 to 5 ft. Patchy fog. A chance of rain this morning, then rain this afternoon. Vsby 1 to 3 NM, decreasing to 1 NM or less this afternoon. .TONIGHT...S winds 10 to 15 kt with gusts up to 20 kt, becoming SW 15 to 20 kt with gusts up to 30 kt after midnight. Seas 4 to 6 ft. Patchy fog. A chance of rain. Vsby 1 NM or less. .SUN...SW winds 15 to 20 kt with gusts up to 30 kt. Seas 5 to 8 ft. Patchy fog. Vsby 1 NM or less. .SUN NIGHT...W winds 10 to 15 kt with gusts up to 25 kt, becoming NW 5 to 10 kt after midnight. Seas 5 to 8 ft. .MON...N winds 5 to 10 kt, becoming SW in the afternoon. Seas 3 to 5 ft. .MON NIGHT...SW winds 5 to 10 kt. Seas 3 to 4 ft. A chance of showers. .TUE...S winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers. .TUE NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers. .WED...SW winds 5 to 10 kt. Seas 3 to 4 ft. A chance of showers. .WED NIGHT...NW winds around 10 kt with gusts up to 20 kt. Seas 3 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. $$ ANZ232-200000- Nantucket Sound- 716 AM EDT Sat May 19 2018 ...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH SUNDAY AFTERNOON... .TODAY...E winds 10 to 15 kt. Gusts up to 20 kt this morning. Seas 2 to 3 ft. Patchy fog. A chance of rain this morning, then rain this afternoon. Vsby 1 to 3 NM, decreasing to 1 NM or less this afternoon. .TONIGHT...S winds 10 to 15 kt. Gusts up to 20 kt, increasing to 30 kt after midnight. Seas 2 to 4 ft. Patchy dense fog. A chance of rain. Vsby 1 NM or less. .SUN...SW winds 15 to 20 kt with gusts up to 30 kt. Seas 2 to 4 ft. Patchy fog. A chance of showers. Vsby 1 NM or less. .SUN NIGHT...W winds 10 to 15 kt with gusts up to 25 kt, becoming N around 5 kt after midnight. Seas 2 to 4 ft. Patchy fog. Vsby 1 to 3 NM. .MON...N winds around 5 kt, becoming SW in the afternoon. Seas around 2 ft. .MON NIGHT...SW winds 5 to 10 kt, becoming W after midnight. Seas around 2 ft. A chance of showers. .TUE...SE winds 5 to 10 kt. Seas 1 foot or less. .TUE NIGHT...S winds 5 to 10 kt. Seas 1 foot or less. A chance of showers. .WED...SW winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers. .WED NIGHT...NW winds 5 to 10 kt with gusts up to 20 kt. Seas 2 to 4 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ233-200000- Vineyard Sound- 716 AM EDT Sat May 19 2018 ...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH SUNDAY AFTERNOON... .TODAY...E winds 10 to 15 kt. Gusts up to 20 kt this morning. Seas around 2 ft. Patchy fog. A chance of rain this morning, then rain this afternoon. Vsby 1 to 3 NM, decreasing to 1 NM or less this afternoon. .TONIGHT...S winds 10 to 15 kt with gusts up to 20 kt, becoming SW 15 to 20 kt with gusts up to 30 kt after midnight. Seas 2 to 4 ft. Patchy fog. Rain likely. Vsby 1 NM or less. .SUN...SW winds 15 to 20 kt with gusts up to 30 kt. Seas 3 to 5 ft. Patchy fog. A chance of showers. Vsby 1 NM or less. .SUN NIGHT...W winds 10 to 15 kt with gusts up to 20 kt, becoming NW 5 to 10 kt after midnight. Seas 2 to 4 ft. Patchy fog. .MON...NW winds around 5 kt, becoming SW in the afternoon. Seas 2 to 3 ft. .MON NIGHT...W winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers. .TUE...SE winds 5 to 10 kt. Seas around 2 ft. A chance of showers. .TUE NIGHT...S winds 5 to 10 kt. Seas around 2 ft. A chance of showers. .WED...SW winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers. .WED NIGHT...NW winds around 10 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. $$ ANZ234-200000- Buzzards Bay- 716 AM EDT Sat May 19 2018 ...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH SUNDAY AFTERNOON... .TODAY...E winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt this afternoon. Seas 1 foot or less. Patchy fog. A chance of rain this morning, then rain this afternoon. Vsby 1 to 3 NM, decreasing to 1 NM or less this afternoon. .TONIGHT...S winds 5 to 10 kt, becoming SW 10 to 15 kt with gusts up to 30 kt after midnight. Seas 2 to 4 ft. Patchy fog. A chance of rain. Vsby 1 NM or less. .SUN...SW winds 10 to 15 kt with gusts up to 30 kt. Seas 2 to 4 ft. Patchy fog. A chance of showers. Vsby 1 NM or less. .SUN NIGHT...W winds 5 to 10 kt with gusts up to 20 kt, becoming N after midnight. Seas 2 to 3 ft. .MON...NW winds around 5 kt, becoming SW in the afternoon. Seas around 2 ft. .MON NIGHT...SW winds 5 to 10 kt, becoming W after midnight. Seas around 2 ft. A chance of showers. .TUE...SE winds 5 to 10 kt. Seas 1 foot or less. A chance of showers. .TUE NIGHT...S winds 5 to 10 kt. Seas 1 foot or less. A chance of showers. .WED...SW winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers. .WED NIGHT...NW winds 5 to 10 kt with gusts up to 20 kt. Seas around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ235-200000- Rhode Island Sound- 716 AM EDT Sat May 19 2018 ...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH SUNDAY AFTERNOON... .TODAY...E winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Patchy fog. A chance of rain this morning, then rain this afternoon. Vsby 1 to 3 NM, decreasing to 1 NM or less this afternoon. .TONIGHT...S winds 10 to 15 kt with gusts up to 20 kt, becoming SW 15 to 20 kt with gusts up to 30 kt after midnight. Seas 3 to 5 ft. Patchy fog. Rain likely. Vsby 1 NM or less. .SUN...SW winds 15 to 20 kt with gusts up to 30 kt. Seas 4 to 6 ft. Patchy fog. A chance of showers. Vsby 1 NM or less. .SUN NIGHT...W winds 10 to 15 kt with gusts up to 20 kt, becoming NW 5 to 10 kt after midnight. Seas 4 to 6 ft. .MON...NW winds around 5 kt, becoming SW in the afternoon. Seas 3 to 5 ft. .MON NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers. .TUE...SE winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers. .TUE NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers. .WED...SW winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers. .WED NIGHT...NW winds 5 to 10 kt with gusts up to 20 kt. Seas 2 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. $$ ANZ237-200000- Block Island Sound- 716 AM EDT Sat May 19 2018 ...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH SUNDAY AFTERNOON... .TODAY...E winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Patchy fog. Rain. Vsby 1 to 3 NM, decreasing to 1 NM or less this afternoon. .TONIGHT...S winds 10 to 15 kt. Gusts up to 20 kt, increasing to 30 kt after midnight. Seas 3 to 5 ft. Patchy fog. A chance of rain. Vsby 1 NM or less. .SUN...SW winds 15 to 20 kt, diminishing to 10 to 15 kt in the afternoon. Gusts up to 30 kt. Seas 4 to 6 ft. Patchy fog. A chance of showers. Vsby 1 NM or less. .SUN NIGHT...W winds 10 to 15 kt with gusts up to 20 kt, becoming NW 5 to 10 kt after midnight. Seas 3 to 5 ft. .MON...NW winds around 5 kt, becoming SW in the afternoon. Seas 2 to 4 ft. .MON NIGHT...W winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers. .TUE...S winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers. .TUE NIGHT...S winds 5 to 10 kt. Seas around 2 ft. A chance of showers. .WED...SW winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers. .WED NIGHT...NW winds 5 to 10 kt with gusts up to 20 kt. Seas 2 to 4 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ230-200000- Boston Harbor- 716 AM EDT Sat May 19 2018 ...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH SUNDAY MORNING... .TODAY...E winds around 10 kt. Waves 2 to 3 ft. A slight chance of rain this morning, then rain this afternoon. Patchy fog this afternoon with vsby 1 to 3 NM. .TONIGHT...S winds 5 to 10 kt. Gusts up to 25 kt after midnight. Waves around 2 ft. Patchy fog. A chance of rain. Vsby 1 NM or less. .SUN...SW winds around 10 kt with gusts up to 25 kt. Waves around 2 ft. A chance of showers. .SUN NIGHT...NW winds 5 to 10 kt. Waves 1 foot or less. .MON...W winds around 5 kt, becoming SW in the afternoon. Waves 1 foot or less. .MON NIGHT...W winds around 5 kt, becoming NW after midnight. Waves 1 foot or less. .TUE...SE winds around 5 kt. Waves 1 foot or less. .TUE NIGHT...SW winds around 5 kt. Waves 1 foot or less. A chance of showers. .WED...W winds around 5 kt. Waves 1 foot or less. A chance of showers. .WED NIGHT...N 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. $$ ANZ236-200000- Narragansett Bay- 716 AM EDT Sat May 19 2018 ...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH SUNDAY AFTERNOON... .TODAY...E winds 5 to 10 kt. Gusts up to 20 kt this morning. Waves 2 to 3 ft. Patchy fog. A chance of rain this morning, then rain this afternoon. Vsby 1 to 3 NM, decreasing to 1 NM or less this afternoon. .TONIGHT...S winds 5 to 10 kt, becoming SW 10 to 15 kt with gusts up to 30 kt after midnight. Waves 2 to 4 ft. Patchy fog. A chance of rain. Vsby 1 NM or less. .SUN...SW winds 10 to 15 kt with gusts up to 30 kt. Waves 2 to 4 ft. Patchy fog. A chance of showers. Vsby 1 NM or less. .SUN NIGHT...NW winds 5 to 10 kt. Waves 2 to 3 ft. .MON...NW winds around 5 kt, becoming SW in the afternoon. Waves 2 to 3 ft. .MON NIGHT...SW winds 5 to 10 kt, becoming W after midnight. Waves 2 to 3 ft. A chance of showers. .TUE...SE winds 5 to 10 kt. Waves around 2 ft. A chance of showers. .TUE NIGHT...S winds around 5 kt. Waves around 2 ft. A chance of showers. .WED...W winds 5 to 10 kt. Waves 2 to 3 ft. A chance of showers. .WED NIGHT...NW winds around 5 kt. Waves 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ 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.