Coastal Waters Forecast
Issued by NWS Boston, MA

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000 FZUS51 KBOX 241422 CWFBOX Coastal Waters Forecast National Weather Service Boston/Norton MA 1022 AM EDT Wed Apr 24 2019 Coastal waters from the Merrimack River MA to Watch Hill RI out to 25 NM ANZ200-250315- 1022 AM EDT Wed Apr 24 2019 .Synopsis for Massachusetts and Rhode Island coastal waters... Mainly dry weather courtesy of high pressure through Thursday. Showery and cooler weather returns Friday as low pressure develops on an approaching frontal boundary. Periods of heavy rain are possible late Friday into Friday night. Dry and windy conditions develop Saturday behind the departing storm system. A weak trough of low pressure may result in a few showers Sunday into Sunday night but by no means a washout. Dry, seasonable weather should return early next week. 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. $$ ANZ250-250315- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 1022 AM EDT Wed Apr 24 2019 .THIS AFTERNOON...W winds 5 to 10 kt. Seas around 4 ft. Patchy dense fog. Vsby 1 NM or less. .TONIGHT...NW winds 10 to 15 kt. Seas 3 to 4 ft. .THU...NW winds 5 to 10 kt, becoming E in the afternoon. Seas around 3 ft. .THU NIGHT...SE winds 10 to 15 kt, becoming S 5 to 10 kt after midnight. Seas around 3 ft. .FRI...SE winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 5 ft. A chance of showers in the morning, then showers likely in the afternoon. Patchy fog in the afternoon with vsby 1 to 3 NM. .FRI NIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Seas around 6 ft. Showers likely. Patchy fog in the evening. Vsby 1 NM or less, increasing to 1 to 3 NM after midnight. .SAT...W winds 15 to 20 kt with gusts up to 25 kt. Seas 5 to 6 ft. Showers likely in the morning with vsby 1 to 3 NM. .SAT NIGHT...W winds 10 to 15 kt with gusts up to 25 kt. Seas 4 to 5 ft. .SUN...SW winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Seas 3 to 4 ft. A chance of showers in the morning, then showers likely in the afternoon. .SUN NIGHT...SW winds 10 to 15 kt, becoming W 15 to 20 kt after midnight. Gusts up to 30 kt. Seas 6 to 7 ft. A chance of showers in the evening. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ251-250315- Massachusetts Bay and Ipswich Bay- 1022 AM EDT Wed Apr 24 2019 .THIS AFTERNOON...NW winds 5 to 10 kt. Gusts up to 20 kt. Seas around 3 ft. Patchy fog. Vsby 1 NM or less. .TONIGHT...NW winds 10 to 15 kt, diminishing to 5 to 10 kt after midnight. Seas around 3 ft. .THU...NW winds 5 to 10 kt, becoming E in the afternoon. Seas 2 to 3 ft. .THU NIGHT...S winds 5 to 10 kt. Seas around 3 ft. .FRI...SE winds 5 to 10 kt, increasing to 10 to 15 kt in the afternoon. Seas 3 to 4 ft. Showers likely. Patchy fog in the afternoon with vsby 1 to 3 NM. .FRI NIGHT...S winds 10 to 15 kt. Seas around 5 ft. Showers likely. Patchy fog in the evening. Vsby 1 NM or less, increasing to 1 to 3 NM after midnight. .SAT...W winds 10 to 15 kt with gusts up to 25 kt. Seas 4 to 5 ft. Showers likely in the morning with vsby 1 to 3 NM. .SAT NIGHT...W winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas around 3 ft. .SUN...W winds 5 to 10 kt, becoming S 10 to 15 kt in the afternoon. Seas 3 to 4 ft. A chance of showers in the morning, then showers likely in the afternoon. .SUN NIGHT...SW winds 10 to 15 kt with gusts up to 25 kt. Seas around 4 ft. A chance of showers in the evening. 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. $$ ANZ231-250315- Cape Cod Bay- 1022 AM EDT Wed Apr 24 2019 .THIS AFTERNOON...W winds 5 to 10 kt. Seas around 2 ft. .TONIGHT...NW winds 5 to 10 kt. Seas around 2 ft. .THU...NW winds 5 to 10 kt, becoming E in the afternoon. Seas around 2 ft. .THU NIGHT...S winds 5 to 10 kt. Seas around 2 ft. .FRI...SE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Showers likely. Patchy fog in the afternoon. .FRI NIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Seas around 3 ft. Showers likely. Patchy fog in the evening. Vsby 1 NM or less, increasing to 1 to 3 NM after midnight. .SAT...W winds 10 to 15 kt with gusts up to 25 kt. Seas around 3 ft. A chance of showers in the morning with vsby 1 to 3 NM. .SAT NIGHT...W winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas 2 to 3 ft. .SUN...W winds 5 to 10 kt, becoming SW 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. A chance of showers in the morning, then showers likely in the afternoon. .SUN NIGHT...W winds 10 to 15 kt with gusts up to 30 kt. Seas around 4 ft. A chance of showers in the evening. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ254-250315- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm- 1022 AM EDT Wed Apr 24 2019 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT... .THIS AFTERNOON...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 5 ft. Patchy dense fog with vsby 1 NM or less. .TONIGHT...NW winds 5 to 10 kt. Seas around 4 ft. .THU...NW winds 5 to 10 kt, becoming NE in the afternoon. Seas 3 to 4 ft. .THU NIGHT...S winds 5 to 10 kt. Seas around 3 ft. .FRI...SE winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 5 ft. A chance of showers. Patchy fog in the afternoon. .FRI NIGHT...S winds 10 to 15 kt with gusts up to 25 kt. Seas around 6 ft. Showers likely. Patchy fog in the evening. Vsby 1 NM or less, increasing to 1 to 3 NM after midnight. .SAT...W winds 15 to 20 kt with gusts up to 25 kt. Seas 6 to 7 ft. Showers likely in the morning with vsby 1 to 3 NM. .SAT NIGHT...W winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 5 to 6 ft. .SUN...W winds 5 to 10 kt, becoming SW 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 4 to 5 ft. A chance of showers in the morning, then showers likely in the afternoon. .SUN NIGHT...SW winds 10 to 15 kt with gusts up to 30 kt. Seas around 6 ft, building to 8 ft after midnight. A chance of showers in the evening. 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. $$ ANZ255-250315- Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket- 1022 AM EDT Wed Apr 24 2019 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT... .THIS AFTERNOON...W winds 10 to 15 kt with gusts up to 20 kt. Seas around 5 ft. .TONIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas around 5 ft. .THU...NW winds 5 to 10 kt, becoming SW in the afternoon. Seas 3 to 4 ft. .THU NIGHT...S winds 5 to 10 kt. Seas around 3 ft. .FRI...SE winds 10 to 15 kt with gusts up to 25 kt. Seas 4 to 5 ft. A chance of showers. Patchy fog in the afternoon with vsby 1 to 3 NM. .FRI NIGHT...S winds 10 to 15 kt with gusts up to 25 kt. Seas 6 to 7 ft. Showers likely. Patchy fog in the evening. Vsby 1 NM or less, increasing to 1 to 3 NM after midnight. .SAT...W winds 15 to 20 kt with gusts up to 25 kt. Seas around 7 ft. A chance of showers in the morning with vsby 1 to 3 NM. .SAT NIGHT...W winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 6 to 7 ft. .SUN...W winds 5 to 10 kt, becoming SW 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 4 to 5 ft. A chance of showers. .SUN NIGHT...SW winds 10 to 15 kt, becoming W 15 to 20 kt after midnight. Gusts up to 30 kt. Seas around 7 ft, building to 9 ft after midnight. A chance of showers in the evening. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ256-250315- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island- 1022 AM EDT Wed Apr 24 2019 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT... .THIS AFTERNOON...W winds 10 to 15 kt, increasing to 15 to 20 kt. Seas around 5 ft. .TONIGHT...W winds 15 to 20 kt, becoming NW 10 to 15 kt after midnight. Seas 4 to 5 ft. .THU...NW winds 5 to 10 kt, becoming SW in the afternoon. Seas 3 to 4 ft. .THU NIGHT...S winds 5 to 10 kt. Seas around 3 ft. A chance of showers after midnight. .FRI...SE winds 10 to 15 kt with gusts up to 20 kt. Seas around 4 ft, building to 6 ft in the afternoon. A chance of showers in the morning, then showers likely in the afternoon. Patchy fog in the afternoon. Vsby 1 to 3 NM. .FRI NIGHT...S winds 10 to 15 kt, becoming SW 15 to 20 kt after midnight. Gusts up to 25 kt. Seas around 6 ft. Showers likely. Patchy fog in the evening with vsby 1 NM or less. .SAT...W winds 15 to 20 kt with gusts up to 30 kt. Seas around 7 ft. A chance of showers in the morning. .SAT NIGHT...W winds 15 to 20 kt, becoming NW 10 to 15 kt after midnight. Seas 5 to 6 ft. .SUN...SW winds 5 to 10 kt, becoming S 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas around 4 ft, building to 6 ft in the afternoon. A chance of showers. .SUN NIGHT...SW winds 10 to 15 kt, becoming W 15 to 20 kt after midnight. Gusts up to 30 kt. Seas around 8 ft. A chance of showers in the evening. 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. $$ ANZ232-250315- Nantucket Sound- 1022 AM EDT Wed Apr 24 2019 .THIS AFTERNOON...W winds 10 to 15 kt with gusts up to 20 kt. Seas around 3 ft. .TONIGHT...NW winds 5 to 10 kt. Seas 2 to 3 ft. .THU...NW winds 5 to 10 kt, becoming SW in the afternoon. Seas around 2 ft. .THU NIGHT...S winds 5 to 10 kt. Seas around 2 ft. .FRI...SE winds 10 to 15 kt with gusts up to 20 kt. Seas around 3 ft. A chance of showers in the morning, then showers likely in the afternoon. Patchy fog in the afternoon with vsby 1 to 3 NM. .FRI NIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. Showers likely. Patchy fog in the evening. Vsby 1 NM or less, increasing to 1 to 3 NM after midnight. .SAT...W winds 15 to 20 kt with gusts up to 25 kt. Seas around 4 ft. A chance of showers in the morning with vsby 1 to 3 NM. .SAT NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas around 3 ft. .SUN...W winds 5 to 10 kt, becoming SW 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 3 to 4 ft. A chance of showers in the morning, then showers likely in the afternoon. .SUN NIGHT...W winds 10 to 15 kt with gusts up to 30 kt. Seas 4 to 5 ft. A chance of showers in the evening. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ233-250315- Vineyard Sound- 1022 AM EDT Wed Apr 24 2019 .THIS AFTERNOON...SW winds 10 to 15 kt, becoming W 15 to 20 kt. Seas around 3 ft. .TONIGHT...NW winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt after midnight. Seas around 3 ft. .THU...NW winds 5 to 10 kt, becoming SW in the afternoon. Seas around 2 ft. .THU NIGHT...S winds 5 to 10 kt. Seas around 2 ft. .FRI...SE winds 10 to 15 kt with gusts up to 20 kt. Seas around 3 ft. Showers likely. Patchy fog in the afternoon with vsby 1 to 3 NM. .FRI NIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Seas around 4 ft. Showers likely. Patchy fog in the evening. Vsby 1 NM or less, increasing to 1 to 3 NM after midnight. .SAT...W winds 15 to 20 kt with gusts up to 25 kt. Seas around 4 ft. A chance of showers in the morning. .SAT NIGHT...W winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas 3 to 4 ft. .SUN...SW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 3 to 4 ft. A chance of showers in the morning, then showers likely in the afternoon. .SUN NIGHT...W winds 10 to 15 kt with gusts up to 30 kt. Seas around 5 ft. A chance of showers in the evening. 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. $$ ANZ234-250315- Buzzards Bay- 1022 AM EDT Wed Apr 24 2019 .THIS AFTERNOON...W winds 10 to 15 kt. Gusts up to 20 kt. Seas 2 to 3 ft. .TONIGHT...NW winds 10 to 15 kt, diminishing to 5 to 10 kt after midnight. Seas 2 to 3 ft. .THU...NW winds around 5 kt, becoming SW in the afternoon. Seas around 2 ft. .THU NIGHT...S winds 5 to 10 kt. Seas around 2 ft. .FRI...SE winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. Showers likely. Patchy fog in the afternoon with vsby 1 to 3 NM. .FRI NIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Seas around 3 ft. Showers likely. Patchy fog in the evening. Vsby 1 to 3 NM. .SAT...W winds 10 to 15 kt, increasing to 15 to 20 kt in the afternoon. Gusts up to 25 kt. Seas around 4 ft. A chance of showers in the morning. .SAT NIGHT...W winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt after midnight. Seas 2 to 3 ft. .SUN...SW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 3 to 4 ft. A chance of showers in the morning, then showers likely in the afternoon. .SUN NIGHT...W winds 10 to 15 kt with gusts up to 25 kt. Seas around 4 ft. A chance of showers in the evening. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ235-250315- Rhode Island Sound- 1022 AM EDT Wed Apr 24 2019 .THIS AFTERNOON...W winds 10 to 15 kt, increasing to 15 to 20 kt. Seas around 4 ft. .TONIGHT...NW winds 15 to 20 kt, diminishing to 5 to 10 kt after midnight. Seas around 4 ft. .THU...NW winds 5 to 10 kt, becoming SW in the afternoon. Seas around 3 ft. .THU NIGHT...S winds 5 to 10 kt. Seas around 3 ft. A chance of showers after midnight. .FRI...SE winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Seas around 3 ft, building to 5 ft in the afternoon. Showers likely. Patchy fog in the afternoon. Vsby 1 to 3 NM. .FRI NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 5 ft. Showers likely. Patchy fog in the evening with vsby 1 NM or less. .SAT...W winds 15 to 20 kt with gusts up to 30 kt. Seas around 5 ft. A chance of showers in the morning. .SAT NIGHT...W winds 10 to 15 kt, diminishing to 5 to 10 kt after midnight. Gusts up to 20 kt. Seas 4 to 5 ft. .SUN...SW winds 5 to 10 kt, becoming S 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 4 to 5 ft. A chance of showers. .SUN NIGHT...SW winds 10 to 15 kt, becoming W 15 to 20 kt after midnight. Gusts up to 30 kt. Seas around 6 ft. A chance of showers in the evening. 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. $$ ANZ237-250315- Block Island Sound- 1022 AM EDT Wed Apr 24 2019 .THIS AFTERNOON...W winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt. Seas around 4 ft. .TONIGHT...NW winds 10 to 15 kt, diminishing to 5 to 10 kt after midnight. Seas around 4 ft. .THU...NW winds 5 to 10 kt, becoming SW in the afternoon. Seas around 3 ft. .THU NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers after midnight. .FRI...SE winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Seas around 3 ft, building to 5 ft in the afternoon. Showers likely. Patchy fog in the afternoon. Vsby 1 to 3 NM. .FRI NIGHT...S winds 10 to 15 kt, becoming SW after midnight. Gusts up to 25 kt. Seas around 5 ft. Showers. Patchy fog in the evening with vsby 1 NM or less. .SAT...W winds 15 to 20 kt with gusts up to 30 kt. Seas around 5 ft. A chance of showers in the morning. .SAT NIGHT...W winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt after midnight. Seas around 4 ft. .SUN...SW winds 5 to 10 kt, becoming S 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 4 to 5 ft. A chance of showers. .SUN NIGHT...W winds 10 to 15 kt with gusts up to 30 kt. Seas around 6 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ230-250315- Boston Harbor- 1022 AM EDT Wed Apr 24 2019 .THIS AFTERNOON...W winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt. Waves around 2 ft. .TONIGHT...NW winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt after midnight. Waves around 2 ft in the evening, then 1 foot or less. .THU...NW winds 5 to 10 kt, becoming E in the afternoon. Waves 1 foot or less. .THU NIGHT...S winds 5 to 10 kt. Waves 1 foot or less. .FRI...SE winds 5 to 10 kt. Waves 2 to 3 ft. Showers likely. Patchy fog in the afternoon with vsby 1 to 3 NM. .FRI NIGHT...SE winds around 10 kt, becoming SW after midnight. Waves around 2 ft. Showers likely. Patchy fog in the evening. Vsby 1 NM or less, increasing to 1 to 3 NM after midnight. .SAT...W winds 10 to 15 kt with gusts up to 30 kt. Waves around 2 ft. Showers likely in the morning with vsby 1 to 3 NM. .SAT NIGHT...W winds 10 to 15 kt. Gusts up to 25 kt in the evening. Waves 1 foot or less. .SUN...SW winds 5 to 10 kt. Waves around 2 ft. A chance of showers in the morning, then showers likely in the afternoon. .SUN NIGHT...W winds 10 to 15 kt with gusts up to 25 kt. Waves around 2 ft. A chance of showers in the evening. 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. $$ ANZ236-250315- Narragansett Bay- 1022 AM EDT Wed Apr 24 2019 .THIS AFTERNOON...W winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt. Waves around 3 ft. .TONIGHT...NW winds 5 to 10 kt. Waves around 3 ft. .THU...NW winds around 5 kt, becoming SW in the afternoon. Waves around 2 ft. .THU NIGHT...S winds 5 to 10 kt. Waves around 2 ft. .FRI...SE winds 5 to 10 kt. Waves 3 to 4 ft. Showers likely. Patchy fog in the afternoon with vsby 1 to 3 NM. .FRI NIGHT...S winds around 10 kt, becoming SW with gusts up to 20 kt after midnight. Waves around 4 ft. Showers. Patchy fog in the evening with vsby 1 NM or less. .SAT...W winds 10 to 15 kt with gusts up to 25 kt. Waves 3 to 4 ft. A chance of showers in the morning. .SAT NIGHT...W winds 10 to 15 kt with gusts up to 25 kt, diminishing to 5 to 10 kt after midnight. Waves 2 to 3 ft. .SUN...SW winds 5 to 10 kt. Waves 3 to 4 ft. A chance of showers in the morning, then showers likely in the afternoon. .SUN NIGHT...W winds 10 to 15 kt with gusts up to 25 kt. Waves 3 to 4 ft. A chance of showers in the evening. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ 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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