Coastal Waters Forecast
Issued by NWS Boston, MA
Issued by NWS Boston, MA
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698 FZUS51 KBOX 202005 CWFBOX Coastal Waters Forecast for Massachusetts and Rhode Island National Weather Service Boston/Norton MA 404 PM EDT Mon May 20 2024 Coastal waters from the Merrimack River MA to Watch Hill RI out to 25 NM ANZ200-210900- 404 PM EDT Mon May 20 2024 .Synopsis for Massachusetts and Rhode Island coastal waters... High pres over the south coastal waters will drift south through Wed with a persistent SW flow setting up over the waters. A cold front moves into New Eng Thu, then a second cold front approaches from the north Fri, moving across the waters Fri night. High pres builds over New Eng and the waters Sat. $$ ANZ250-210900- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 404 PM EDT Mon May 20 2024 .TONIGHT...S winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: E 4 ft at 8 seconds. Areas of fog. Vsby 1 NM or less. .TUE...S winds 10 to 15 kt, increasing to 15 to 20 kt in the afternoon. Seas 3 to 4 ft. Wave Detail: E 4 ft at 9 seconds and S 3 ft at 4 seconds. Areas of fog in the morning with vsby 1 NM or less. .TUE NIGHT...SW winds 15 to 20 kt. Seas 3 to 4 ft. Wave Detail: E 4 ft at 9 seconds and SW 3 ft at 4 seconds. .WED...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Wave Detail: SW 3 ft at 4 seconds and E 3 ft at 8 seconds. .WED NIGHT AND THU...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Wave Detail: SW 3 ft at 4 seconds and E 2 ft at 8 seconds. .THU NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Wave Detail: SW 3 ft at 4 seconds and E 1 foot at 8 seconds. A chance of showers after midnight. .FRI...SW winds around 10 kt. Seas around 2 ft. A chance of showers. .FRI NIGHT THROUGH SAT NIGHT...S winds 5 to 10 kt. Seas around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ251-210900- Massachusetts Bay and Ipswich Bay- 404 PM EDT Mon May 20 2024 .TONIGHT...S winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: E 4 ft at 8 seconds. Areas of fog. Vsby 1 NM or less. .TUE...S 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. Wave Detail: E 3 ft at 9 seconds and S 2 ft at 4 seconds. Areas of fog in the morning with vsby 1 NM or less. .TUE NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at 9 seconds and S 2 ft at 4 seconds. .WED...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at 8 seconds and SW 2 ft at 4 seconds. .WED NIGHT AND THU...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SW 2 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 around 2 ft. Wave Detail: SW 2 ft at 3 seconds and E 1 foot at 7 seconds. A chance of showers after midnight. .FRI...SW winds around 10 kt. Seas 1 foot or less. A chance of showers. .FRI NIGHT THROUGH SAT NIGHT...S 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. $$ ANZ231-210900- Cape Cod Bay- 404 PM EDT Mon May 20 2024 .TONIGHT...SE winds around 5 kt, becoming S after midnight. Seas around 2 ft. Wave Detail: E 2 ft at 8 seconds and NE 1 foot at 3 seconds. Areas of fog. Vsby 1 NM or less. .TUE...S winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas around 2 ft. Wave Detail: E 2 ft at 9 seconds and S 1 foot at 2 seconds. Areas of fog in the morning with vsby 1 NM or less. .TUE NIGHT...SW winds around 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 3 seconds and E 2 ft at 9 seconds. Patchy fog after midnight. .WED...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 3 seconds and E 2 ft at 8 seconds. Patchy fog in the morning. .WED NIGHT AND THU...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 3 seconds and E 1 foot at 8 seconds. .THU NIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas around 2 ft. Wave Detail: SW 2 ft at 3 seconds and E 1 foot at 7 seconds. A chance of showers after midnight. .FRI...SW winds 5 to 10 kt. Seas 1 foot or less. A chance of showers. .FRI NIGHT THROUGH SAT NIGHT...S winds 5 to 10 kt. Seas 1 foot or less. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ254-210900- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm- 404 PM EDT Mon May 20 2024 .TONIGHT...E winds 5 to 10 kt, becoming S after midnight. Seas 3 to 4 ft. Wave Detail: E 4 ft at 8 seconds. Areas of fog. Vsby 1 NM or less. .TUE...S 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. Wave Detail: E 4 ft at 9 seconds and SW 1 foot at 5 seconds. Areas of fog in the morning with vsby 1 NM or less. .TUE NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. Wave Detail: E 4 ft at 9 seconds and SW 3 ft at 4 seconds. Patchy fog after midnight with vsby 1 to 3 NM. .WED...SW winds around 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. Wave Detail: SW 3 ft at 4 seconds and E 3 ft at 8 seconds. .WED NIGHT AND THU...SW winds around 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. Wave Detail: SW 3 ft at 4 seconds and E 2 ft at 8 seconds. .THU NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Wave Detail: SW 3 ft at 5 seconds and E 1 foot at 7 seconds. A chance of showers after midnight. .FRI...SW winds around 10 kt. Seas 2 to 3 ft. A chance of showers. .FRI NIGHT THROUGH SAT NIGHT...SE winds 5 to 10 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. $$ ANZ255-210900- Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket- 404 PM EDT Mon May 20 2024 .TONIGHT...E winds 5 to 10 kt, diminishing to around 5 kt after midnight. Seas 2 to 4 ft. Wave Detail: E 4 ft at 8 seconds and NE 1 foot at 3 seconds. Areas of fog. Vsby 1 NM or less. .TUE...SW winds around 5 kt, increasing to 5 to 10 kt with gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: E 3 ft at 9 seconds and SW 1 foot at 3 seconds. Areas of fog in the morning with vsby 1 NM or less. .TUE NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at 9 seconds and SW 2 ft at 4 seconds. Patchy fog after midnight with vsby 1 to 3 NM. .WED...SW winds 10 to 15 kt, increasing to 15 to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds and E 3 ft at 8 seconds. Patchy fog in the morning with vsby 1 to 3 NM. .WED NIGHT AND THU...SW winds 15 to 20 kt. Seas 3 to 4 ft. Wave Detail: SW 4 ft at 5 seconds and E 2 ft at 8 seconds. .THU NIGHT...SW winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Seas 3 to 4 ft. Wave Detail: SW 4 ft at 4 seconds and E 1 foot at 8 seconds. A chance of showers after midnight. .FRI...SW winds 10 to 15 kt. Seas 2 to 4 ft. A chance of showers. .FRI NIGHT THROUGH SAT NIGHT...SE winds 10 to 15 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ256-210900- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island- 404 PM EDT Mon May 20 2024 .TONIGHT...SE winds around 5 kt, becoming SW around 5 kt after midnight. Seas 2 to 3 ft. Wave Detail: E 3 ft at 8 seconds and N 1 foot at 3 seconds. Areas of fog. Vsby 1 NM or less. .TUE...SW 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. Wave Detail: E 3 ft at 8 seconds and SW 1 foot at 3 seconds. Areas of fog in the morning with vsby 1 NM or less. .TUE NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at 9 seconds and SW 2 ft at 4 seconds. Patchy fog after midnight with vsby 1 NM or less. .WED...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 3 ft at 8 seconds. Patchy fog in the morning with vsby 1 NM or less. .WED NIGHT AND THU...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. Wave Detail: SW 3 ft at 4 seconds and E 2 ft at 8 seconds. .THU NIGHT...SW winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Seas 3 to 4 ft. Wave Detail: SW 3 ft at 5 seconds and E 1 foot at 8 seconds. A chance of showers after midnight. .FRI...SW winds around 10 kt. Seas 2 to 4 ft. A chance of showers. .FRI NIGHT THROUGH SAT NIGHT...SE winds 10 to 15 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. $$ ANZ232-210900- Nantucket Sound- 404 PM EDT Mon May 20 2024 .TONIGHT...E winds 5 to 10 kt, becoming S after midnight. Seas around 2 ft. Wave Detail: E 2 ft at 8 seconds and NE 1 foot at 3 seconds. Areas of fog. Vsby 1 NM or less. .TUE...SW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas around 2 ft. Wave Detail: SW 2 ft at 3 seconds and E 2 ft at 8 seconds. Areas of fog in the morning with vsby 1 NM or less. .TUE NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 3 seconds and E 2 ft at 9 seconds. Patchy fog after midnight with vsby 1 to 3 NM. .WED...SW winds around 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and E 2 ft at 8 seconds. Patchy fog in the morning with vsby 1 to 3 NM. .WED NIGHT AND THU...SW winds around 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds and E 1 foot at 8 seconds. .THU NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds and E 1 foot at 7 seconds. A chance of showers after midnight. .FRI...SW winds 10 to 15 kt. Seas around 2 ft. A chance of showers. .FRI NIGHT THROUGH SAT NIGHT...SE winds 10 to 15 kt. Seas 1 foot or less. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ233-210900- Vineyard Sound- 404 PM EDT Mon May 20 2024 .TONIGHT...SE winds 5 to 10 kt, becoming SW after midnight. Seas around 2 ft. Wave Detail: N 1 foot at 2 seconds and E 1 foot at 9 seconds. Areas of fog. Vsby 1 NM or less. .TUE...SW winds 5 to 10 kt. Gusts up to 20 kt in the afternoon. Seas around 2 ft. Wave Detail: SW 1 foot at 2 seconds and SW 1 foot at 5 seconds. Areas of fog in the morning with vsby 1 NM or less. .TUE NIGHT...SW winds around 10 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. Patchy fog after midnight. .WED...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. Patchy fog in the morning with vsby 1 NM or less. .WED NIGHT AND 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 9 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 SE 1 foot at 8 seconds. A chance of showers after midnight. .FRI...SW winds 10 to 15 kt. Seas around 2 ft. A chance of showers. .FRI NIGHT THROUGH SAT NIGHT...SE winds 10 to 15 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. $$ ANZ234-210900- Buzzards Bay- 404 PM EDT Mon May 20 2024 .TONIGHT...SE winds around 5 kt, becoming SW after midnight. Seas around 2 ft. Wave Detail: NE 1 foot at 2 seconds and E 1 foot at 8 seconds. Areas of fog. Vsby 1 NM or less. .TUE...SW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas around 2 ft. Wave Detail: SW 2 ft at 3 seconds and E 1 foot at 9 seconds. Areas of fog in the morning with vsby 1 NM or less. .TUE NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and E 1 foot at 9 seconds. Patchy fog after midnight. .WED...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and E 1 foot at 9 seconds. Patchy fog in the morning with vsby 1 NM or less. .WED NIGHT AND THU...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and E 1 foot at 8 seconds. .THU NIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and SE 1 foot at 8 seconds. A chance of showers after midnight. .FRI...SW winds 10 to 15 kt. Seas around 2 ft. A chance of showers. .FRI NIGHT THROUGH SAT NIGHT...SE winds 5 to 10 kt. Seas 1 foot or less. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ235-210900- Rhode Island Sound- 404 PM EDT Mon May 20 2024 .TONIGHT...SE winds around 5 kt, becoming SW after midnight. Seas around 2 ft. Wave Detail: SE 2 ft at 8 seconds and NE 1 foot at 3 seconds. Areas of fog. Vsby 1 NM or less. .TUE...SW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas around 2 ft. Wave Detail: SW 2 ft at 3 seconds and SE 2 ft at 9 seconds. Areas of fog in the morning with vsby 1 NM or less. .TUE NIGHT...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 2 ft at 9 seconds. Patchy fog after midnight with vsby 1 to 3 NM. .WED...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 SE 2 ft at 9 seconds. Patchy fog in the morning with vsby 1 NM or less. .WED NIGHT AND THU...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 SE 1 foot 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 SE 1 foot at 8 seconds. A chance of showers. .FRI...SW winds 10 to 15 kt. Seas 2 to 3 ft. A chance of showers. .FRI NIGHT THROUGH SAT NIGHT...SE winds 10 to 15 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. $$ ANZ237-210900- Block Island Sound- 404 PM EDT Mon May 20 2024 .TONIGHT...S winds around 5 kt. Seas around 2 ft. Wave Detail: E 2 ft at 8 seconds and NE 1 foot at 3 seconds. Areas of fog. Vsby 1 NM or less. .TUE...SW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas around 2 ft. Wave Detail: SW 2 ft at 3 seconds and SE 2 ft at 8 seconds. Areas of fog in the morning with vsby 1 NM or less. .TUE NIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas around 2 ft. Wave Detail: SW 2 ft at 3 seconds and E 2 ft at 9 seconds. Patchy fog after midnight with vsby 1 NM or less. .WED...SW winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and E 2 ft at 9 seconds. Patchy fog in the morning with vsby 1 NM or less. .WED NIGHT AND THU...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 4 seconds and E 2 ft at 8 seconds. .THU NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt after midnight. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 4 seconds and SE 1 foot at 8 seconds. A chance of showers. .FRI...SW winds 5 to 10 kt. Seas around 2 ft. A chance of showers. .FRI NIGHT THROUGH SAT NIGHT...SE winds 5 to 10 kt. Seas around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ230-210900- Boston Harbor- 404 PM EDT Mon May 20 2024 .TONIGHT...SE winds 5 to 10 kt, becoming S after midnight. Waves 1 foot or less. Areas of fog after midnight with vsby 1 to 3 NM. .TUE...S winds around 5 kt, increasing to around 10 kt with gusts up to 20 kt in the afternoon. Waves 1 foot or less, then around 2 ft in the afternoon. Areas of fog in the morning with vsby 1 to 3 NM. .TUE NIGHT...SW winds around 10 kt with gusts up to 20 kt. Waves around 2 ft. .WED...SW winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Waves around 2 ft. .WED NIGHT AND THU...SW winds 10 to 15 kt with gusts up to 20 kt. Waves around 2 ft. .THU NIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt in the evening. Waves 1 foot or less. A chance of showers. .FRI...W winds around 10 kt. Waves 1 foot or less. A chance of showers. .FRI NIGHT THROUGH SAT NIGHT...S winds 5 to 10 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. $$ ANZ236-210900- Narragansett Bay- 404 PM EDT Mon May 20 2024 .TONIGHT...S winds 5 to 10 kt. Waves around 2 ft this evening, then 1 foot or less. Areas of fog. Vsby 1 NM or less. .TUE...SW winds 5 to 10 kt, becoming S 10 to 15 kt with gusts up to 20 kt in the afternoon. Waves 1 foot or less, then around 2 ft in the afternoon. Areas of fog in the morning with vsby 1 NM or less. .TUE NIGHT...SW winds 5 to 10 kt with gusts up to 20 kt. Waves around 2 ft. .WED...SW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Waves around 2 ft. Patchy fog in the morning with vsby 1 NM or less. .WED NIGHT AND THU...SW winds 10 to 15 kt with gusts up to 20 kt. Waves 2 to 3 ft. .THU NIGHT...SW winds 10 to 15 kt, diminishing to 5 to 10 kt after midnight. Waves 2 to 3 ft. A chance of showers. .FRI...W winds 5 to 10 kt. Waves around 2 ft. A chance of showers. .FRI NIGHT THROUGH SAT NIGHT...SE winds 5 to 10 kt. Waves around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ 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