Coastal Waters Forecast
Issued by NWS Boston, MA

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871 FZUS51 KBOX 290203 CWFBOX Coastal Waters Forecast for Massachusetts and Rhode Island National Weather Service Boston/Norton MA 1003 PM EDT Tue May 28 2024 Coastal waters from the Merrimack River MA to Watch Hill RI out to 25 NM ANZ200-291500- 1003 PM EDT Tue May 28 2024 .Synopsis for Massachusetts and Rhode Island coastal waters... A cold front crosses the waters later Wed into Wed night. A ridge of high pres then builds in from the west late in the week into the weekend. $$ ANZ250-291500- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 1003 PM EDT Tue May 28 2024 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 5 AM EDT WEDNESDAY... .OVERNIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. Wave Detail: SE 4 ft at 8 seconds and SW 2 ft at 3 seconds. .WED...W winds 5 to 10 kt, becoming S in the afternoon. Seas 2 to 4 ft. Wave Detail: SE 4 ft at 8 seconds and W 1 foot at 3 seconds. .WED NIGHT...SW winds 5 to 10 kt, becoming N 10 to 15 kt with gusts up to 20 kt after midnight. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 8 seconds and N 1 foot at 2 seconds. .THU...N winds 10 to 15 kt, becoming NE 5 to 10 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: E 3 ft at 8 seconds and N 2 ft at 4 seconds. A chance of showers. .THU NIGHT...NW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 7 seconds and N 1 foot at 3 seconds. A chance of showers in the evening. .FRI AND FRI NIGHT...NW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: N 2 ft at 3 seconds and SE 2 ft at 7 seconds. .SAT THROUGH SUN NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ251-291500- Massachusetts Bay and Ipswich Bay- 1003 PM EDT Tue May 28 2024 .OVERNIGHT...W winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at 8 seconds and W 1 foot at 3 seconds. .WED...W winds 5 to 10 kt, becoming SE in the afternoon. Seas 2 to 3 ft. Wave Detail: E 3 ft at 8 seconds and W 1 foot at 3 seconds. .WED NIGHT...SW winds 5 to 10 kt, becoming N after midnight. Seas around 2 ft. Wave Detail: E 2 ft at 9 seconds. .THU...NE winds around 10 kt. Seas around 2 ft. Wave Detail: NE 2 ft at 8 seconds and N 1 foot at 3 seconds. A chance of showers. .THU NIGHT...S winds 5 to 10 kt, becoming NW after midnight. Seas around 2 ft. Wave Detail: E 2 ft at 6 seconds and N 1 foot at 3 seconds. A chance of showers in the evening. .FRI AND FRI NIGHT...NW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: NE 2 ft at 6 seconds and NW 1 foot at 3 seconds. .SAT THROUGH SUN NIGHT...SW 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. $$ ANZ231-291500- Cape Cod Bay- 1003 PM EDT Tue May 28 2024 .OVERNIGHT...W winds 5 to 10 kt. Gusts up to 20 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 7 seconds and SW 1 foot at 3 seconds. A slight chance of showers. .WED...W winds 5 to 10 kt, becoming S in the afternoon. Seas around 2 ft. Wave Detail: SE 2 ft at 7 seconds and W 1 foot at 3 seconds. .WED NIGHT...SW winds around 5 kt, becoming NW after midnight. Seas around 2 ft. Wave Detail: SE 2 ft at 8 seconds and SW 1 foot at 2 seconds. .THU...N winds 5 to 10 kt. Seas around 2 ft. Wave Detail: N 1 foot at 3 seconds and E 1 foot at 7 seconds. A chance of showers. .THU NIGHT...N winds 5 to 10 kt, becoming NW after midnight. Seas 1 foot or less. Wave Detail: N 1 foot at 5 seconds. .FRI AND FRI NIGHT...NW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: N 1 foot at 3 seconds and NE 1 foot at 6 seconds. .SAT THROUGH SUN NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ254-291500- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm- 1003 PM EDT Tue May 28 2024 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 5 AM EDT WEDNESDAY... .OVERNIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 6 ft. Wave Detail: SE 5 ft at 8 seconds and W 1 foot at 3 seconds. Patchy fog with vsby 1 to 3 NM. .WED...W winds 5 to 10 kt, becoming SW in the afternoon. Seas 3 to 5 ft. Wave Detail: SE 5 ft at 8 seconds and W 1 foot at 3 seconds. Patchy fog in the morning with vsby 1 to 3 NM. .WED NIGHT...SW winds 5 to 10 kt. Seas 2 to 4 ft. Wave Detail: SE 4 ft at 8 seconds and SW 1 foot at 3 seconds. .THU...N winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 8 seconds and NW 1 foot at 2 seconds. A chance of showers. .THU NIGHT THROUGH FRI NIGHT...NW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 7 seconds and N 1 foot at 4 seconds. .SAT THROUGH SUN NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: NE 3 ft at 10 seconds and NW 1 foot at 3 seconds. 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. $$ ANZ255-291500- Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket- 1003 PM EDT Tue May 28 2024 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 5 AM EDT WEDNESDAY... .OVERNIGHT...W winds 10 to 15 kt with gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail: S 5 ft at 7 seconds and SW 1 foot at 3 seconds. .WED...SW winds 5 to 10 kt. Seas 3 to 5 ft. Wave Detail: S 4 ft at 8 seconds and W 1 foot at 3 seconds. Patchy fog in the morning with vsby 1 to 3 NM. .WED NIGHT...SW winds 5 to 10 kt. Seas 2 to 4 ft. Wave Detail: S 4 ft at 8 seconds. .THU...N winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 7 seconds and NW 1 foot at 2 seconds. A chance of showers. .THU NIGHT AND FRI...N winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: NE 3 ft at 7 seconds and N 1 foot at 3 seconds. .FRI NIGHT...NW winds around 10 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 6 seconds and W 1 foot at 3 seconds. .SAT THROUGH SUN NIGHT...SW winds around 10 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ256-291500- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island- 1003 PM EDT Tue May 28 2024 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 5 AM EDT WEDNESDAY... .OVERNIGHT...W winds 10 to 15 kt, diminishing to 5 to 10 kt. Gusts up to 20 kt. Seas 3 to 5 ft. Wave Detail: S 5 ft at 7 seconds and W 1 foot at 4 seconds. .WED...W winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: SE 4 ft at 8 seconds. .WED NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 8 seconds. A chance of showers after midnight. .THU...N winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 8 seconds. A chance of showers. .THU NIGHT THROUGH FRI NIGHT...NW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at 7 seconds and N 1 foot at 3 seconds. .SAT THROUGH SUN NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 4 seconds and SE 2 ft at 7 seconds. 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. $$ ANZ232-291500- Nantucket Sound- 1003 PM EDT Tue May 28 2024 .OVERNIGHT...W winds 10 to 15 kt, diminishing to 5 to 10 kt. Gusts up to 20 kt. Seas 2 to 4 ft. Wave Detail: SW 2 ft at 3 seconds and SE 2 ft at 7 seconds. Patchy fog with vsby 1 to 3 NM. .WED...W winds 5 to 10 kt, becoming SW in the afternoon. Seas 2 to 3 ft. Wave Detail: SE 2 ft at 8 seconds and W 1 foot at 3 seconds. .WED NIGHT...SW winds 5 to 10 kt, becoming W after midnight. Seas around 2 ft. Wave Detail: SE 2 ft at 8 seconds and SW 1 foot at 3 seconds. .THU...N winds 5 to 10 kt. Seas around 2 ft. Wave Detail: NE 2 ft at 6 seconds and NW 1 foot at 3 seconds. A chance of showers. .THU NIGHT AND FRI...N winds 5 to 10 kt. Seas around 2 ft. Wave Detail: N 1 foot at 4 seconds. .FRI NIGHT...NW winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: NW 1 foot at 2 seconds and E 1 foot at 6 seconds. .SAT THROUGH SUN NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ233-291500- Vineyard Sound- 1003 PM EDT Tue May 28 2024 .OVERNIGHT...W winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 7 seconds and SW 1 foot at 4 seconds. .WED...W winds 5 to 10 kt. Seas around 2 ft. Wave Detail: S 2 ft at 7 seconds and W 1 foot at 4 seconds. .WED NIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Seas around 2 ft. Wave Detail: S 2 ft at 7 seconds and SW 1 foot at 4 seconds. A chance of showers after midnight. .THU...N winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: E 1 foot at 7 seconds. A chance of showers. .THU NIGHT THROUGH FRI NIGHT...NW winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: N 1 foot at 4 seconds. .SAT THROUGH SUN NIGHT...SW winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: NW 1 foot at 3 seconds and SE 1 foot at 6 seconds. 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. $$ ANZ234-291500- Buzzards Bay- 1003 PM EDT Tue May 28 2024 .OVERNIGHT...W winds 5 to 10 kt. Gusts up to 20 kt. Seas around 2 ft. Wave Detail: S 2 ft at 7 seconds and SW 1 foot at 4 seconds. .WED...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: S 2 ft at 7 seconds and W 1 foot at 4 seconds. .WED NIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Seas around 2 ft in the evening, then 1 foot or less. Wave Detail: S 2 ft at 7 seconds and SW 1 foot at 4 seconds, becoming SW 1 foot at 4 seconds and S 1 foot at 7 seconds. .THU...N winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: NW 1 foot at 4 seconds and E 1 foot at 7 seconds. A chance of showers. .THU NIGHT...N winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: N 1 foot at 4 seconds. A chance of showers in the evening. .FRI AND FRI NIGHT...NW winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: NW 1 foot at 2 seconds and E 1 foot at 6 seconds. .SAT THROUGH SUN NIGHT...SW winds 5 to 10 kt. Seas 1 foot or less. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ235-291500- Rhode Island Sound- 1003 PM EDT Tue May 28 2024 .OVERNIGHT...W winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt. Seas 2 to 4 ft. Wave Detail: S 4 ft at 7 seconds and SW 1 foot at 4 seconds. .WED...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 7 seconds and SW 1 foot at 3 seconds. .WED NIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Seas 2 to 3 ft. Wave Detail: S 3 ft at 7 seconds and SW 1 foot at 3 seconds. A chance of showers after midnight. .THU...NE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 7 seconds. A chance of showers. .THU NIGHT THROUGH FRI NIGHT...NW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: NE 2 ft at 7 seconds and N 1 foot at 3 seconds. .SAT THROUGH SUN NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 3 seconds and E 2 ft at 6 seconds. 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. $$ ANZ237-291500- Block Island Sound- 1003 PM EDT Tue May 28 2024 .OVERNIGHT...W winds 5 to 10 kt. Gusts up to 20 kt. Seas 2 to 4 ft. Wave Detail: S 4 ft at 7 seconds and W 1 foot at 3 seconds. .WED...W winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 7 seconds. .WED NIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 8 seconds and W 1 foot at 2 seconds. A chance of showers after midnight. .THU...NE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 8 seconds. A chance of showers. .THU NIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Seas around 2 ft. Wave Detail: SE 2 ft at 7 seconds and W 1 foot at 2 seconds. .FRI AND FRI NIGHT...NW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 7 seconds and NW 1 foot at 2 seconds. .SAT THROUGH SUN NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ230-291500- Boston Harbor- 1003 PM EDT Tue May 28 2024 .OVERNIGHT...W winds 5 to 10 kt. Waves around 2 ft, then 1 foot or less. .WED...NW winds 5 to 10 kt, becoming SE in the afternoon. Waves 1 foot or less. .WED NIGHT...SW winds 5 to 10 kt, becoming N after midnight. Waves 1 foot or less. A chance of showers after midnight. .THU...N winds 5 to 10 kt, becoming NE in the afternoon. Waves 1 foot or less. A chance of showers. .THU NIGHT...SE winds 5 to 10 kt, becoming NW after midnight. Waves 1 foot or less. A chance of showers in the evening. .FRI AND FRI NIGHT...NW winds 5 to 10 kt. Waves 1 foot or less. .SAT THROUGH SUN NIGHT...SW 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. $$ ANZ236-291500- Narragansett Bay- 1003 PM EDT Tue May 28 2024 .OVERNIGHT...W winds 5 to 10 kt. Waves 2 to 3 ft. .WED...W winds around 5 kt, becoming SW in the afternoon. Waves around 2 ft. A chance of showers and tstms in the afternoon. Some tstms may produce small hail in the afternoon. .WED NIGHT...SW winds 5 to 10 kt, becoming N after midnight. Waves around 2 ft. A chance of showers after midnight. .THU...N winds 5 to 10 kt. Waves around 2 ft. A chance of showers. .THU NIGHT...W winds 5 to 10 kt, becoming NW after midnight. Waves around 2 ft. A chance of showers in the evening. .FRI AND FRI NIGHT...NW winds 5 to 10 kt. Waves around 2 ft. .SAT THROUGH SUN NIGHT...SW winds 5 to 10 kt. Waves around 2 ft. Winds and waves higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ 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