Coastal Waters Forecast
Issued by NWS Boston, MA

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083 FZUS51 KBOX 222003 CWFBOX Coastal Waters Forecast for Massachusetts and Rhode Island National Weather Service Boston/Norton MA 403 PM EDT Wed May 22 2024 Coastal waters from the Merrimack River MA to Watch Hill RI out to 25 NM ANZ200-230900- 403 PM EDT Wed May 22 2024 .Synopsis for Massachusetts and Rhode Island coastal waters... High pres southeast of New Eng remains in place through early Thu. A cold front slides into southern New England late on Thu and across the waters by early/mid Fri. The front will bring showers and thunderstorms. Hit or miss showers and storms are possible through the weekend with a front nearby. A frontal system lifts over the waters later on Mon into Tue. $$ ANZ250-230900- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 403 PM EDT Wed May 22 2024 .TONIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: S 3 ft at 4 seconds and E 2 ft at 8 seconds. .THU...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds and E 2 ft at 8 seconds. .THU NIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 4 seconds and E 1 foot at 8 seconds. .FRI...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: W 2 ft at 4 seconds and E 1 foot at 8 seconds. .FRI NIGHT...SW winds around 10 kt, becoming NW after midnight. Seas around 2 ft. Wave Detail: SW 2 ft at 3 seconds and SE 1 foot at 9 seconds. .SAT...N winds 5 to 10 kt, becoming SE in the afternoon. Seas around 2 ft. Wave Detail: NW 1 foot at 3 seconds and E 1 foot at 9 seconds. .SAT NIGHT...S winds around 10 kt. Seas 2 to 3 ft. A chance of showers after midnight. .SUN...S winds around 10 kt. Seas around 2 ft. A chance of showers. .SUN NIGHT AND MON...SE winds 10 to 15 kt. Seas 2 to 3 ft. .MON NIGHT...SE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ251-230900- Massachusetts Bay and Ipswich Bay- 403 PM EDT Wed May 22 2024 .TONIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 4 seconds and E 2 ft at 8 seconds. .THU...SW winds 10 to 15 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 3 seconds and E 1 foot at 7 seconds. A chance of showers in the afternoon. .THU NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 3 seconds and E 1 foot at 7 seconds. .FRI...SW winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: W 1 foot at 3 seconds and E 1 foot at 7 seconds. .FRI NIGHT...W winds around 10 kt, becoming NW after midnight. Seas around 2 ft. Wave Detail: SW 1 foot at 3 seconds and E 1 foot at 8 seconds. .SAT...N winds around 5 kt, becoming SE in the afternoon. Seas 1 foot or less, then around 2 ft in the afternoon. Wave Detail: NW 1 foot at 2 seconds and E 1 foot at 8 seconds, becoming SE 1 foot at 2 seconds and E 1 foot at 7 seconds. .SAT NIGHT...S winds 5 to 10 kt. Seas around 2 ft. A chance of showers. .SUN...S winds 5 to 10 kt. Seas 1 foot or less. A chance of showers. .SUN NIGHT...S winds 5 to 10 kt. Seas 1 foot or less. .MON...SE winds 10 to 15 kt. Seas around 2 ft. A chance of showers. .MON NIGHT...SE winds 10 to 15 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. $$ ANZ231-230900- Cape Cod Bay- 403 PM EDT Wed May 22 2024 .TONIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 3 seconds and E 1 foot at 8 seconds. .THU...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: SW 1 foot at 3 seconds and E 1 foot at 8 seconds. .THU NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt after midnight. Seas around 2 ft. Wave Detail: SW 1 foot at 3 seconds and E 1 foot at 8 seconds. A chance of showers. .FRI...SW winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: SW 1 foot at 2 seconds and E 1 foot at 8 seconds. A chance of showers in the morning. .FRI NIGHT...SW winds around 10 kt, becoming NW after midnight. Seas 1 foot or less. Wave Detail: SW 1 foot at 2 seconds and SE 1 foot at 8 seconds. .SAT...N winds around 5 kt, becoming SE in the afternoon. Seas 1 foot or less. Wave Detail: NW 1 foot at 3 seconds and E 1 foot at 8 seconds. .SAT NIGHT...S winds 5 to 10 kt. Seas 1 foot or less. A chance of showers after midnight. .SUN...S winds 5 to 10 kt. Seas 1 foot or less. A chance of showers. .SUN NIGHT AND MON...SE winds 5 to 10 kt. Seas 1 foot or less, then around 2 ft. .MON NIGHT...SE winds around 10 kt. Seas 2 to 3 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ254-230900- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm- 403 PM EDT Wed May 22 2024 .TONIGHT...SW winds around 15 kt with gusts up to 20 kt. Seas around 3 ft. Wave Detail: SW 3 ft at 4 seconds and E 2 ft at 8 seconds. .THU...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 3 ft. Wave Detail: SW 3 ft at 4 seconds and E 2 ft at 8 seconds. .THU NIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds and E 1 foot at 8 seconds. A chance of showers. Vsby 1 NM or less. .FRI...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 5 seconds and E 1 foot at 8 seconds. A chance of showers in the morning with vsby 1 to 3 NM. .FRI NIGHT...SW winds around 10 kt, becoming NW after midnight. Seas around 2 ft. Wave Detail: SW 2 ft at 5 seconds and SE 1 foot at 9 seconds. .SAT...N winds 5 to 10 kt, becoming SE in the afternoon. Seas around 2 ft. Wave Detail: NW 2 ft at 4 seconds and E 1 foot at 9 seconds. .SAT NIGHT...S winds 5 to 10 kt. Seas around 2 ft. A chance of showers after midnight. .SUN THROUGH MON...SE winds 5 to 10 kt. Seas 2 to 3 ft. .MON NIGHT...SE winds 10 to 15 kt with gusts up to 20 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. $$ ANZ255-230900- Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket- 403 PM EDT Wed May 22 2024 .TONIGHT...SW winds around 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds and E 2 ft at 8 seconds. .THU...SW winds around 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 5 seconds and E 2 ft at 8 seconds. .THU NIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 5 seconds and E 1 foot at 8 seconds. A chance of showers. Vsby 1 NM or less. .FRI...SW winds around 10 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 5 seconds and E 1 foot at 8 seconds. A chance of showers in the morning with vsby 1 to 3 NM. .FRI NIGHT...W winds around 10 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 5 seconds and SE 1 foot at 9 seconds. .SAT...NE winds 5 to 10 kt, becoming SE in the afternoon. Seas around 2 ft. Wave Detail: SW 2 ft at 5 seconds and SE 1 foot at 9 seconds. .SAT NIGHT...S winds around 10 kt. Seas around 2 ft. A chance of showers after midnight. .SUN...S winds around 10 kt. Seas around 2 ft. A chance of showers. .SUN NIGHT AND MON...SE winds 10 to 15 kt. Seas 2 to 3 ft. .MON NIGHT...SE winds around 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ256-230900- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island- 403 PM EDT Wed May 22 2024 .TONIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds and E 2 ft at 8 seconds. .THU...SW winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Seas around 3 ft. Wave Detail: SW 3 ft at 5 seconds and E 2 ft at 8 seconds. .THU NIGHT...SW winds 10 to 15 kt, diminishing to 5 to 10 kt after midnight. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 5 seconds and E 1 foot at 8 seconds. A chance of showers. Vsby 1 to 3 NM, decreasing to 1 NM or less after midnight. .FRI...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 5 seconds and E 1 foot at 8 seconds. A chance of showers in the morning. .FRI NIGHT...W winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 5 seconds and SE 1 foot at 9 seconds. .SAT...NE winds around 5 kt, becoming S in the afternoon. Seas around 2 ft. Wave Detail: SW 2 ft at 5 seconds and SE 1 foot at 9 seconds. .SAT NIGHT...S winds 5 to 10 kt. Seas around 2 ft. A chance of showers after midnight. .SUN...S winds 5 to 10 kt. Seas around 2 ft. A chance of showers. .SUN NIGHT AND MON...S winds 5 to 10 kt, becoming SE 10 to 15 kt. Seas 2 to 3 ft. .MON NIGHT...S winds 10 to 15 kt with gusts up to 20 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. $$ ANZ232-230900- Nantucket Sound- 403 PM EDT Wed May 22 2024 .TONIGHT...SW winds around 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and E 1 foot at 8 seconds. .THU...SW winds around 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and E 1 foot at 7 seconds. .THU NIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and E 1 foot at 7 seconds. A chance of showers. Vsby 1 NM or less after midnight. .FRI...SW winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: SW 1 foot at 4 seconds and E 1 foot at 7 seconds. A chance of showers in the morning. .FRI NIGHT...SW winds around 10 kt, becoming W after midnight. Seas 1 foot or less. Wave Detail: SW 1 foot at 3 seconds and SE 1 foot at 8 seconds. .SAT...NE winds 5 to 10 kt, becoming SE in the afternoon. Seas 1 foot or less. Wave Detail: W 1 foot at 4 seconds and E 1 foot at 8 seconds. .SAT NIGHT...S winds 5 to 10 kt. Seas 1 foot or less. A chance of showers after midnight. .SUN...S winds 5 to 10 kt. Seas 1 foot or less. A chance of showers. .SUN NIGHT AND MON...S winds 5 to 10 kt, becoming SE 10 to 15 kt. Seas 1 foot or less, then around 2 ft. .MON NIGHT...SE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ233-230900- Vineyard Sound- 403 PM EDT Wed May 22 2024 .TONIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and E 1 foot at 9 seconds. .THU...SW winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Seas around 2 ft. Wave Detail: SW 2 ft at 5 seconds and SE 1 foot at 9 seconds. .THU NIGHT...SW winds 10 to 15 kt, diminishing to 5 to 10 kt after midnight. Seas around 2 ft. Wave Detail: SW 2 ft at 5 seconds and SE 1 foot at 8 seconds. A chance of showers. Vsby 1 to 3 NM. .FRI...SW winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: SW 1 foot at 5 seconds and SE 1 foot at 8 seconds. A chance of showers in the morning. .FRI NIGHT...SW winds around 10 kt, becoming W after midnight. Seas 1 foot or less. Wave Detail: SW 1 foot at 5 seconds and SE 1 foot at 8 seconds. .SAT...NE winds around 5 kt, becoming S in the afternoon. Seas 1 foot or less. Wave Detail: SW 1 foot at 5 seconds and SE 1 foot at 9 seconds. .SAT NIGHT...S winds 5 to 10 kt. Seas 1 foot or less. A chance of showers after midnight. .SUN...S winds 5 to 10 kt. Seas 1 foot or less. A chance of showers. .SUN NIGHT AND MON...S winds 5 to 10 kt, becoming SE 10 to 15 kt. Seas 1 foot or less, then around 2 ft. .MON NIGHT...SE winds 10 to 15 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. $$ ANZ234-230900- Buzzards Bay- 403 PM EDT Wed May 22 2024 .TONIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and E 1 foot at 9 seconds. .THU...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and SE 1 foot at 8 seconds. .THU NIGHT...SW winds 10 to 15 kt, diminishing to 5 to 10 kt after midnight. Seas around 2 ft. Wave Detail: SW 2 ft at 5 seconds and SE 1 foot at 8 seconds. A chance of showers. Vsby 1 to 3 NM. .FRI...SW winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: SW 1 foot at 5 seconds and SE 1 foot at 8 seconds. A chance of showers in the morning. .FRI NIGHT...SW winds around 10 kt, becoming W after midnight. Seas 1 foot or less. Wave Detail: SW 1 foot at 4 seconds and SE 1 foot at 8 seconds. .SAT...NE winds around 5 kt, becoming S in the afternoon. Seas 1 foot or less. Wave Detail: SW 1 foot at 5 seconds and SE 1 foot at 8 seconds. .SAT NIGHT...S winds 5 to 10 kt. Seas 1 foot or less. A chance of showers after midnight. .SUN...S winds 5 to 10 kt. Seas 1 foot or less. A chance of showers. .SUN NIGHT AND MON...S winds 5 to 10 kt, becoming SE 10 to 15 kt. Seas 1 foot or less. .MON NIGHT...SE winds 10 to 15 kt. Seas 2 to 3 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ235-230900- Rhode Island Sound- 403 PM EDT Wed May 22 2024 .TONIGHT...SW winds around 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and SE 1 foot at 9 seconds. .THU...SW winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Seas around 2 ft. Wave Detail: SW 2 ft at 5 seconds and SE 1 foot at 8 seconds. .THU NIGHT...SW winds 10 to 15 kt, diminishing to 5 to 10 kt after midnight. Seas around 2 ft. Wave Detail: SW 2 ft at 5 seconds and SE 1 foot at 8 seconds. A chance of showers. Vsby 1 to 3 NM. .FRI...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 5 seconds and SE 1 foot at 8 seconds. A chance of showers in the morning. .FRI NIGHT...SW winds around 10 kt, becoming W after midnight. Seas around 2 ft. Wave Detail: SW 2 ft at 5 seconds and SE 1 foot at 8 seconds. .SAT...NE winds around 5 kt, becoming S in the afternoon. Seas around 2 ft. Wave Detail: S 2 ft at 5 seconds and SE 1 foot at 9 seconds. .SAT NIGHT...S winds 5 to 10 kt. Seas around 2 ft. A chance of showers. .SUN...S winds 5 to 10 kt. Seas 1 foot or less. A chance of showers. .SUN NIGHT...S winds 5 to 10 kt. Seas around 2 ft. .MON...SE winds 10 to 15 kt. Seas around 2 ft. A chance of showers. .MON NIGHT...S winds 10 to 15 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. $$ ANZ237-230900- Block Island Sound- 403 PM EDT Wed May 22 2024 .TONIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt this evening. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and SE 2 ft at 9 seconds. .THU...SW winds 10 to 15 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and E 1 foot at 8 seconds. .THU NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 5 seconds and SE 1 foot at 8 seconds. A chance of showers. Vsby 1 to 3 NM after midnight. .FRI...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 5 seconds and SE 1 foot at 8 seconds. A chance of showers in the morning. .FRI NIGHT...SW winds 5 to 10 kt, becoming W after midnight. Seas around 2 ft. Wave Detail: SW 2 ft at 5 seconds and SE 1 foot at 8 seconds. .SAT...NE winds around 5 kt, becoming S in the afternoon. Seas around 2 ft in the morning, then 1 foot or less. Wave Detail: S 1 foot at 5 seconds and SE 1 foot at 9 seconds. .SAT NIGHT...S winds 5 to 10 kt. Seas around 2 ft. A chance of showers. .SUN...S winds 5 to 10 kt. Seas 1 foot or less. A chance of showers. .SUN NIGHT...S winds 5 to 10 kt. Seas around 2 ft. .MON...SE winds 5 to 10 kt. Seas around 2 ft. A chance of showers. .MON NIGHT...S winds 10 to 15 kt. Seas 2 to 4 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ230-230900- Boston Harbor- 403 PM EDT Wed May 22 2024 .TONIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Waves around 2 ft. .THU...SW winds around 10 kt. Waves around 2 ft in the morning, then 1 foot or less. A chance of showers in the afternoon. .THU NIGHT...SW winds 5 to 10 kt. Waves 1 foot or less. A chance of showers in the evening. .FRI...W winds 5 to 10 kt. Waves 1 foot or less. .FRI NIGHT...W winds around 10 kt, becoming NW after midnight. Waves 1 foot or less. .SAT...N winds around 5 kt, becoming SE in the afternoon. Waves 1 foot or less. .SAT NIGHT...S winds 5 to 10 kt. Waves 1 foot or less. A chance of showers. .SUN...S winds 5 to 10 kt. Waves 1 foot or less. A chance of showers. .SUN NIGHT...S winds 5 to 10 kt. Waves 1 foot or less. .MON...SE winds 10 to 15 kt. Waves around 2 ft. A chance of showers. .MON NIGHT...SE winds 10 to 15 kt. Waves around 2 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. $$ ANZ236-230900- Narragansett Bay- 403 PM EDT Wed May 22 2024 .TONIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt this evening. Waves around 2 ft. .THU...SW winds 10 to 15 kt. Waves around 2 ft. .THU NIGHT...SW winds 5 to 10 kt. Waves around 2 ft. A chance of showers. .FRI...SW winds 5 to 10 kt. Waves around 2 ft. A chance of showers in the morning. .FRI NIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Waves around 2 ft. .SAT...NE winds around 5 kt, becoming S in the afternoon. Waves 1 foot or less. .SAT NIGHT...S winds 5 to 10 kt. Waves 1 foot or less. A chance of showers. .SUN...S winds 5 to 10 kt. Waves 1 foot or less. A chance of showers. .SUN NIGHT...S winds 5 to 10 kt. Waves 1 foot or less. .MON...SE winds 5 to 10 kt. Waves around 2 ft. A chance of showers. .MON NIGHT...S winds around 10 kt. Waves 2 to 4 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ 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