Coastal Waters Forecast
Issued by NWS Boston, MA

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000 FZUS51 KBOX 182316 CWFBOX Coastal Waters Forecast National Weather Service Boston/Norton MA 716 PM EDT Fri May 18 2018 Coastal waters from the Merrimack River MA to Watch Hill RI out to 25 NM ANZ200-191200- 716 PM EDT Fri May 18 2018 .Synopsis for Massachusetts and Rhode Island coastal waters... A frontal boundry S of Long Island will push N late tonight into Sat. Expecting heavy rainfall to limit vsbys on Sat. A passing cold front Sun afternoon could trigger a thunderstorm or two across the near shore waters. Dry weather returns on 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. $$ ANZ250-191200- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 716 PM EDT Fri May 18 2018 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING... .TONIGHT...E winds 5 to 10 kt. Seas 2 to 4 ft. .SAT...E winds 5 to 10 kt, increasing to 10 to 15 kt in the afternoon. Seas 2 to 4 ft. Patchy fog. Rain. Vsby 1 to 3 NM. .SAT NIGHT...S winds 10 to 15 kt. Gusts up to 25 kt after midnight. Seas 3 to 5 ft. Patchy fog. A chance of showers. Vsby 1 NM or less. .SUN...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 6 ft. Patchy fog. A chance of showers and tstms. Some tstms may produce heavy rainfall. Vsby 1 to 3 NM. .SUN NIGHT...NW winds 5 to 10 kt. Seas 2 to 4 ft. .MON...W winds 5 to 10 kt, becoming SW in the afternoon. Seas 2 to 3 ft. .MON NIGHT...W winds 5 to 10 kt. Seas 2 to 3 ft. .TUE...S winds 10 to 15 kt. Seas 2 to 3 ft. A chance of showers. .TUE NIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. A chance of showers. .WED...W winds 5 to 10 kt. Seas 2 to 4 ft. .WED NIGHT...NW winds 5 to 10 kt. Seas 2 to 4 ft. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ251-191200- Massachusetts Bay and Ipswich Bay- 716 PM EDT Fri May 18 2018 .TONIGHT...E winds 5 to 10 kt. Seas 2 to 4 ft. .SAT...E winds 5 to 10 kt. Seas 2 to 3 ft. Patchy fog. Rain. Vsby 1 to 3 NM. .SAT NIGHT...S winds 5 to 10 kt. Gusts up to 20 kt after midnight. Seas 2 to 4 ft. Patchy fog. A chance of showers. Vsby 1 NM or less. .SUN...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Patchy fog. A chance of showers and tstms. Some tstms may produce heavy rainfall. Vsby 1 to 3 NM. .SUN NIGHT...NW winds 5 to 10 kt. Seas 2 to 3 ft. .MON...W winds around 5 kt. Seas around 2 ft. .MON NIGHT...SW winds around 5 kt, becoming W around 5 kt after midnight. Seas 1 foot or less. .TUE...S winds 5 to 10 kt. Seas around 2 ft. A chance of showers. .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 around 2 ft. .WED NIGHT...NW winds 5 to 10 kt. Seas around 2 ft. Winds and seas higher in and near tstms. 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. $$ ANZ231-191200- Cape Cod Bay- 716 PM EDT Fri May 18 2018 .TONIGHT...E winds 5 to 10 kt. Seas 2 to 3 ft. .SAT...E winds 5 to 10 kt. Seas around 2 ft. Patchy fog. Rain. Vsby 1 to 3 NM. .SAT NIGHT...S winds 10 to 15 kt. Gusts up to 25 kt after midnight. Seas 2 to 4 ft. Patchy fog. A chance of showers. Vsby 1 NM or less. .SUN...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 3 ft. Patchy fog. A chance of showers and tstms. Some tstms may produce heavy rainfall. Vsby 1 to 3 NM. .SUN NIGHT...NW winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers. Vsby 1 to 3 NM. .MON...NW winds around 5 kt, becoming SW in the afternoon. Seas 1 foot or less. .MON NIGHT...SW winds 5 to 10 kt. Seas 1 foot or less. .TUE...S winds 5 to 10 kt. Seas 1 foot or less. A chance of showers. .TUE NIGHT...S winds 5 to 10 kt. Seas around 2 ft. A chance of showers. .WED...W winds 5 to 10 kt. Seas around 2 ft. .WED NIGHT...NW winds 5 to 10 kt. Seas 2 to 3 ft. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ254-191200- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm- 716 PM EDT Fri May 18 2018 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH SATURDAY MORNING... .TONIGHT...E winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 6 ft. .SAT...E winds 10 to 15 kt. Gusts up to 20 kt in the morning. Seas 3 to 5 ft. Patchy fog. Rain. Vsby 1 NM or less. .SAT NIGHT...S winds 10 to 15 kt, becoming SW 15 to 20 kt with gusts up to 25 kt after midnight. Seas 4 to 6 ft. Patchy fog. A chance of showers. Vsby 1 NM or less. .SUN...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 7 ft. Patchy fog. A chance of showers and tstms. Some tstms may produce heavy rainfall. 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. 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 3 ft. .TUE...S winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers. .TUE NIGHT...S winds around 10 kt. Seas 2 to 4 ft. A chance of showers. .WED...W winds 5 to 10 kt. Seas 3 to 5 ft. A chance of showers. .WED NIGHT...NW winds 5 to 10 kt. Seas 3 to 5 ft. Winds and seas higher in and near tstms. 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. $$ ANZ255-191200- Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket- 716 PM EDT Fri May 18 2018 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH SATURDAY MORNING... .TONIGHT...NE winds 10 to 15 kt with gusts up to 25 kt. Seas 4 to 6 ft. Patchy fog after midnight with vsby 1 NM or less. .SAT...E winds 10 to 15 kt. Gusts up to 20 kt in the morning. Seas 3 to 5 ft. Patchy fog. Rain. Vsby 1 NM or less. .SAT NIGHT...S winds 10 to 15 kt, becoming SW 15 to 20 kt with gusts up to 25 kt after midnight. Seas 4 to 6 ft. Patchy fog. A chance of showers. Vsby 1 NM or less. .SUN...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 5 to 7 ft. Patchy fog. A chance of showers and tstms. Some tstms may produce heavy rainfall. Vsby 1 NM or less. .SUN NIGHT...W winds 10 to 15 kt with gusts up to 20 kt, becoming N 5 to 10 kt after midnight. Seas 4 to 7 ft. .MON...NW winds 5 to 10 kt, becoming SW in the afternoon. Seas 3 to 5 ft. .MON NIGHT...SW winds 5 to 10 kt. Seas 2 to 4 ft. .TUE...S winds 5 to 10 kt. Seas around 3 ft. A chance of showers. .TUE NIGHT...S winds around 10 kt. Seas around 3 ft. A chance of showers. .WED...W winds around 10 kt. Seas 3 to 5 ft. A chance of showers. .WED NIGHT...W winds around 10 kt. Seas 4 to 6 ft. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ256-191200- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island- 716 PM EDT Fri May 18 2018 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH SATURDAY AFTERNOON... .TONIGHT...NE winds 15 to 20 kt, becoming E 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 4 to 6 ft. A slight chance of rain after midnight with vsby 1 to 3 NM. .SAT...E winds 10 to 15 kt. Gusts up to 20 kt in the morning. Seas 3 to 5 ft. Patchy fog. Rain. Vsby 1 NM or less. .SAT NIGHT...S winds 10 to 15 kt, becoming SW 15 to 20 kt with gusts up to 25 kt after midnight. Seas 4 to 6 ft. Patchy fog. A chance of showers. Vsby 1 NM or less. .SUN...SW winds 15 to 20 kt with gusts up to 25 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 20 kt, becoming NW 5 to 10 kt after midnight. Seas 5 to 8 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 3 to 4 ft. .TUE...SE winds 5 to 10 kt. Seas around 3 ft. A chance of showers. .TUE NIGHT...S winds around 10 kt. Seas around 3 ft. A chance of showers. .WED...SW winds 5 to 10 kt. Seas 3 to 5 ft. .WED NIGHT...W winds 5 to 10 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. $$ ANZ232-191200- Nantucket Sound- 716 PM EDT Fri May 18 2018 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING... .TONIGHT...E winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. .SAT...E winds 10 to 15 kt. Gusts up to 20 kt in the morning. Seas 2 to 3 ft. Patchy fog. Rain. Vsby 1 to 3 NM. .SAT NIGHT...S winds 10 to 15 kt. Gusts up to 25 kt after midnight. Seas 2 to 4 ft. Patchy fog. A chance of showers. Vsby 1 NM or less. .SUN...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. Patchy fog. A chance of showers and tstms. Some tstms may produce heavy rainfall. Vsby 1 NM or less. .SUN NIGHT...W winds 10 to 15 kt with gusts up to 20 kt, becoming N 5 to 10 kt after midnight. Seas 2 to 4 ft. Patchy fog. A chance of showers. Vsby 1 to 3 NM. .MON...NW winds around 5 kt, becoming SW in the afternoon. Seas around 2 ft. .MON NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. .TUE...S winds 5 to 10 kt. Seas around 2 ft. A chance of showers. .TUE NIGHT...S winds around 10 kt. Seas around 2 ft. A chance of showers. .WED...W winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers. .WED NIGHT...NW winds 5 to 10 kt. Seas 2 to 3 ft. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ233-191200- Vineyard Sound- 716 PM EDT Fri May 18 2018 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING... .TONIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. .SAT...E winds 10 to 15 kt. Gusts up to 20 kt in the morning. Seas around 2 ft. Patchy fog. Rain. Vsby 1 to 3 NM. .SAT NIGHT...S winds 10 to 15 kt. Gusts up to 25 kt after midnight. Seas 2 to 4 ft. Patchy fog. A chance of showers. Vsby 1 NM or less. .SUN...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. Patchy fog. A chance of showers and tstms. Some tstms may produce heavy rainfall. Vsby 1 NM or less. .SUN NIGHT...W winds 10 to 15 kt, becoming NW 5 to 10 kt after midnight. Seas 2 to 4 ft. .MON...NW winds around 5 kt, becoming SW in the afternoon. Seas 2 to 3 ft. .MON NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. .TUE...S winds 5 to 10 kt. Seas around 2 ft. A chance of showers. .TUE NIGHT...S winds around 10 kt. Seas around 2 ft. A chance of showers. .WED...W winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers. .WED NIGHT...W winds 5 to 10 kt. Seas 2 to 3 ft. Winds and seas higher in and near tstms. 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. $$ ANZ234-191200- Buzzards Bay- 716 PM EDT Fri May 18 2018 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING... .TONIGHT...NE winds 10 to 15 kt. Gusts up to 20 kt this evening. Seas around 2 ft. .SAT...E winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt in the afternoon. Seas 1 foot or less. Patchy fog. Rain. Vsby 1 to 3 NM. .SAT NIGHT...S winds 5 to 10 kt, becoming SW 10 to 15 kt with gusts up to 25 kt after midnight. Seas 2 to 4 ft. Patchy fog. A chance of showers. Vsby 1 NM or less. .SUN...SW winds 15 to 20 kt, diminishing to 10 to 15 kt in the afternoon. Gusts up to 25 kt. Seas 2 to 4 ft. Patchy fog. A chance of showers and tstms. Some tstms may produce heavy rainfall. Vsby 1 NM or less. .SUN NIGHT...W winds 5 to 10 kt, becoming NW after midnight. Seas 2 to 3 ft. .MON...NW winds around 5 kt, becoming SW in the afternoon. Seas around 2 ft. .MON NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. .TUE...S winds 5 to 10 kt. Seas 1 foot or less. A chance of showers. .TUE NIGHT...S winds 5 to 10 kt. Seas around 2 ft. A chance of showers. .WED...W winds 5 to 10 kt. Seas 2 to 3 ft. .WED NIGHT...W winds 5 to 10 kt. Seas 2 to 3 ft. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ235-191200- Rhode Island Sound- 716 PM EDT Fri May 18 2018 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING... .TONIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. A slight chance of rain after midnight. .SAT...E winds 10 to 15 kt. Gusts up to 20 kt in the morning. Seas 2 to 4 ft. Patchy fog. Rain. Vsby 1 to 3 NM. .SAT NIGHT...S winds 10 to 15 kt, becoming SW 15 to 20 kt with gusts up to 25 kt after midnight. Seas 3 to 5 ft. Patchy fog. A chance of showers. Vsby 1 NM or less. .SUN...SW winds 15 to 20 kt with gusts up to 25 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 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. 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 4 ft. .WED NIGHT...W 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. $$ ANZ237-191200- Block Island Sound- 716 PM EDT Fri May 18 2018 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING... .TONIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. A chance of rain after midnight. .SAT...E winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Patchy fog. Rain. Vsby 1 to 3 NM. .SAT NIGHT...S winds 10 to 15 kt. Gusts up to 20 kt after midnight. Seas 3 to 5 ft. Patchy fog. A chance of showers. Vsby 1 NM or less. .SUN...SW winds 15 to 20 kt, diminishing to 10 to 15 kt in the afternoon. Gusts up to 25 kt. Seas 3 to 5 ft. Patchy fog. A chance of showers. Vsby 1 NM or less. .SUN NIGHT...W winds 10 to 15 kt, becoming NW 5 to 10 kt after midnight. Seas 3 to 5 ft. .MON...NW winds around 5 kt, becoming SW in the afternoon. Seas 2 to 4 ft. .MON NIGHT...SW winds 5 to 10 kt. Seas 2 to 4 ft. .TUE...S winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers. .TUE NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers. .WED...SW winds 5 to 10 kt. Seas 2 to 4 ft. .WED NIGHT...W winds 5 to 10 kt. Seas 2 to 4 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ230-191200- Boston Harbor- 716 PM EDT Fri May 18 2018 .TONIGHT...E winds 5 to 10 kt. Waves 2 to 3 ft. .SAT...E winds 5 to 10 kt. Waves 2 to 3 ft. Patchy fog. Rain. Vsby 1 to 3 NM. .SAT NIGHT...SE winds 5 to 10 kt, becoming SW after midnight. Waves around 2 ft. Patchy fog. Showers likely. Vsby 1 to 3 NM. .SUN...SW winds around 10 kt with gusts up to 20 kt. Waves around 2 ft. Patchy fog. Showers likely with a chance of tstms. Some tstms may produce heavy rainfall. Vsby 1 to 3 NM. .SUN NIGHT...NW winds 5 to 10 kt. Waves 1 foot or less. A chance of showers. .MON...W winds around 5 kt. Waves 1 foot or less. .MON NIGHT...W winds around 5 kt. Waves 1 foot or less. .TUE...S winds 5 to 10 kt. Waves 1 foot or less. A chance of showers. .TUE NIGHT...SW winds 5 to 10 kt. Waves 1 foot or less. A chance of showers. .WED...W winds around 5 kt. Waves 1 foot or less. .WED NIGHT...NW winds around 5 kt. Waves 1 foot or less. Winds and waves higher in and near tstms. 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. $$ ANZ236-191200- Narragansett Bay- 716 PM EDT Fri May 18 2018 .TONIGHT...NE winds 5 to 10 kt. Waves 2 to 3 ft. .SAT...E winds 5 to 10 kt. Waves 2 to 3 ft. Patchy fog. Rain. Vsby 1 to 3 NM. .SAT NIGHT...S winds 5 to 10 kt, becoming SW 10 to 15 kt with gusts up to 20 kt after midnight. Waves 2 to 4 ft. Patchy fog. Showers likely. Vsby 1 NM or less. .SUN...SW winds 10 to 15 kt with gusts up to 25 kt. Waves 2 to 4 ft. Patchy fog. A chance of showers and tstms. Some tstms may produce heavy rainfall. Vsby 1 NM or less. .SUN NIGHT...NW winds 5 to 10 kt. Waves 2 to 4 ft. .MON...NW winds around 5 kt, becoming SW in the afternoon. Waves 2 to 3 ft. .MON NIGHT...SW winds 5 to 10 kt, diminishing to around 5 kt after midnight. Waves 2 to 3 ft. .TUE...S winds 5 to 10 kt. Waves around 2 ft. A chance of showers. .TUE NIGHT...SW winds 5 to 10 kt. Waves around 2 ft. A chance of showers. .WED...W winds around 5 kt. Waves around 2 ft. .WED NIGHT...NW winds around 5 kt. Waves around 2 ft. Winds and waves higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ 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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