Coastal Waters Forecast
Issued by NWS Boston, MA

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000 FZUS51 KBOX 241704 CWFBOX Coastal Waters Forecast for Massachusetts and Rhode Island National Weather Service Boston/Norton MA 104 PM EDT Wed Apr 24 2024 Coastal waters from the Merrimack River MA to Watch Hill RI out to 25 NM ANZ200-250600- 104 PM EDT Wed Apr 24 2024 .Synopsis for Massachusetts and Rhode Island coastal waters... Cold front sweeps across the waters today bringing scattered showers and perhaps a thunderstorm or two. Winds will shift from the southwest to the west, eventually turning north, by tonight. Winds will gust to as high as 25 to 30kt on northerly flow into Thursday morning. High pressure again builds over the waters for late week with light winds. Low pressure brings rain chances and breezy winds by Tuesday. $$ ANZ250-250600- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 104 PM EDT Wed Apr 24 2024 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH THURSDAY AFTERNOON... .THIS AFTERNOON...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 6 ft. Wave Detail: E 6 ft at 10 seconds and SW 2 ft at 4 seconds. A chance of showers. .TONIGHT...NW winds 20 to 25 kt, becoming N 15 to 20 kt after midnight. Gusts up to 30 kt. Seas 4 to 6 ft. Wave Detail: N 5 ft at 6 seconds and E 5 ft at 10 seconds. .THU...N winds 10 to 15 kt with gusts up to 20 kt, becoming SW 5 to 10 kt in the afternoon. Seas 4 to 6 ft, subsiding to 3 to 4 ft in the afternoon. Wave Detail: N 5 ft at 6 seconds and E 4 ft at 9 seconds, becoming NW 3 ft at 5 seconds and E 3 ft at 9 seconds. .THU NIGHT...S winds 5 to 10 kt, becoming W after midnight. Seas 2 to 3 ft. Wave Detail: N 2 ft at 5 seconds and E 2 ft at 8 seconds. .FRI...N winds 5 to 10 kt, becoming E in the afternoon. Seas around 2 ft. Wave Detail: E 2 ft at 9 seconds and N 1 ft at 4 seconds. .FRI NIGHT...S winds 5 to 10 kt, becoming SW after midnight. Seas around 2 ft. Wave Detail: S 2 ft at 3 seconds and E 2 ft at 8 seconds. .SAT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. .SAT NIGHT AND SUN...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. A chance of showers. .SUN NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ251-250600- Massachusetts Bay and Ipswich Bay- 104 PM EDT Wed Apr 24 2024 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH THURSDAY MORNING... .THIS AFTERNOON...SW winds around 10 kt with gusts up to 20 kt. Seas 2 to 4 ft. Wave Detail: E 4 ft at 10 seconds and S 1 ft at 3 seconds. A chance of showers. .TONIGHT...NW winds 20 to 25 kt with gusts up to 30 kt. Seas 3 to 5 ft. Wave Detail: E 5 ft at 10 seconds and N 4 ft at 5 seconds. .THU...NW winds 10 to 15 kt, becoming S in the afternoon. Seas 2 to 4 ft. Wave Detail: E 4 ft at 9 seconds and N 3 ft at 6 seconds. .THU NIGHT...S winds around 10 kt, becoming W after midnight. Seas around 2 ft. Wave Detail: NE 2 ft at 6 seconds and E 2 ft at 9 seconds. .FRI...N winds 5 to 10 kt, becoming E 10 to 15 kt in the afternoon. Seas around 2 ft. Wave Detail: E 2 ft at 8 seconds and W 1 ft at 3 seconds. .FRI NIGHT...S winds 10 to 15 kt, becoming SW after midnight. Seas around 2 ft. Wave Detail: SE 2 ft at 3 seconds and E 1 ft at 9 seconds. .SAT...S winds 10 to 15 kt. Seas around 2 ft. .SAT NIGHT AND SUN...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. A chance of showers. .SUN NIGHT...SW 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. $$ ANZ231-250600- Cape Cod Bay- 104 PM EDT Wed Apr 24 2024 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH THURSDAY MORNING... .THIS AFTERNOON...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at 10 seconds and SW 1 ft at 3 seconds. A chance of showers. .TONIGHT...NW winds 20 to 25 kt, becoming N 15 to 20 kt after midnight. Gusts up to 30 kt. Seas 2 to 4 ft. Wave Detail: N 4 ft at 5 seconds and E 3 ft at 10 seconds. A chance of showers in the evening. .THU...N winds 10 to 15 kt with gusts up to 20 kt, becoming NE around 5 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: N 3 ft at 6 seconds and E 3 ft at 9 seconds. .THU NIGHT...S winds 5 to 10 kt, becoming W after midnight. Seas around 2 ft in the evening, then 1 foot or less. Wave Detail: N 2 ft at 6 seconds and E 2 ft at 8 seconds, becoming NW 1 ft at 5 seconds and E 1 ft at 8 seconds. .FRI...N winds around 5 kt, becoming E in the afternoon. Seas 1 foot or less. Wave Detail: N 1 ft at 5 seconds and E 1 ft at 8 seconds. .FRI NIGHT...S winds 5 to 10 kt, becoming SW after midnight. Seas 1 foot or less. Wave Detail: S 1 ft at 2 seconds and NE 1 ft at 3 seconds. .SAT THROUGH SUN NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ254-250600- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm- 104 PM EDT Wed Apr 24 2024 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH THURSDAY AFTERNOON... .THIS AFTERNOON...SW winds 10 to 15 kt with gusts up to 25 kt. Seas 4 to 6 ft. Wave Detail: E 6 ft at 10 seconds and SW 3 ft at 4 seconds. .TONIGHT...NW winds 15 to 20 kt, becoming N after midnight. Gusts up to 30 kt. Seas 4 to 6 ft. Wave Detail: E 6 ft at 10 seconds and N 5 ft at 5 seconds. .THU...N winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt in the afternoon. Seas 4 to 6 ft. Wave Detail: N 4 ft at 7 seconds and E 4 ft at 9 seconds. .THU NIGHT...S winds around 5 kt, becoming W around 5 kt after midnight. Seas 2 to 4 ft. Wave Detail: N 3 ft at 7 seconds and SW 2 ft at 6 seconds. .FRI...N winds around 5 kt, becoming NE in the afternoon. Seas around 2 ft. Wave Detail: N 2 ft at 5 seconds and E 2 ft at 9 seconds. .FRI NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E 2 ft at 8 seconds and N 1 ft at 4 seconds. .SAT THROUGH SUN NIGHT...SW winds 10 to 15 kt with gusts up to 20 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. $$ ANZ255-250600- Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket- 104 PM EDT Wed Apr 24 2024 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH THURSDAY AFTERNOON... .THIS AFTERNOON...SW winds around 15 kt with gusts up to 25 kt. Seas 4 to 6 ft. Wave Detail: E 5 ft at 10 seconds and SW 3 ft at 5 seconds. A slight chance of showers. Vsby 1 to 3 NM. .TONIGHT...W winds 15 to 20 kt, becoming N 20 to 25 kt after midnight. Gusts up to 30 kt. Seas 4 to 6 ft. Wave Detail: E 5 ft at 10 seconds and N 4 ft at 5 seconds. .THU...NE winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt in the afternoon. Seas 4 to 6 ft, subsiding to 2 to 4 ft in the afternoon. Wave Detail: E 4 ft at 9 seconds and N 3 ft at 4 seconds, becoming SW 3 ft at 7 seconds and E 3 ft at 9 seconds. .THU NIGHT...SE winds around 5 kt, becoming NW after midnight. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 6 seconds and E 2 ft at 8 seconds. .FRI...N winds 5 to 10 kt, becoming E in the afternoon. Seas around 2 ft. Wave Detail: E 2 ft at 8 seconds and NE 1 ft at 5 seconds. .FRI NIGHT...S winds 5 to 10 kt, becoming SW after midnight. Seas around 2 ft. Wave Detail: SE 2 ft at 8 seconds and S 1 ft at 2 seconds. .SAT THROUGH SUN NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ256-250600- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island- 104 PM EDT Wed Apr 24 2024 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH THURSDAY AFTERNOON... .THIS AFTERNOON...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 5 to 6 ft. Wave Detail: E 5 ft at 11 seconds and SW 3 ft at 6 seconds. .TONIGHT...W winds 15 to 20 kt, becoming N after midnight. Gusts up to 25 kt. Seas 5 to 6 ft. Wave Detail: E 5 ft at 10 seconds and N 4 ft at 5 seconds. .THU...NE winds 10 to 15 kt with gusts up to 20 kt, becoming E 5 to 10 kt in the afternoon. Seas 3 to 5 ft. Wave Detail: N 3 ft at 4 seconds and SW 3 ft at 7 seconds. .THU NIGHT...S winds 5 to 10 kt, becoming SW after midnight. Seas 2 to 3 ft. Wave Detail: E 3 ft at 8 seconds and NE 1 ft at 4 seconds. .FRI...N winds 5 to 10 kt, becoming SE in the afternoon. Seas around 2 ft. Wave Detail: E 2 ft at 8 seconds and NE 1 ft at 2 seconds. .FRI NIGHT...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 8 seconds and SE 1 ft at 3 seconds. .SAT THROUGH SUN NIGHT...SW winds 10 to 15 kt with gusts up to 20 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. $$ ANZ232-250600- Nantucket Sound- 104 PM EDT Wed Apr 24 2024 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH THURSDAY MORNING... .THIS AFTERNOON...SW winds around 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: SW 3 ft at 4 seconds and E 2 ft at 10 seconds. A slight chance of showers. Vsby 1 to 3 NM. .TONIGHT...NW winds 15 to 20 kt, becoming N after midnight. Gusts up to 30 kt. Seas 2 to 4 ft. Wave Detail: N 3 ft at 4 seconds and E 2 ft at 10 seconds. A chance of showers in the evening. .THU...N winds 10 to 15 kt with gusts up to 20 kt, becoming NE 5 to 10 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: N 2 ft at 5 seconds and E 2 ft at 9 seconds. .THU NIGHT...S winds around 5 kt, becoming W around 5 kt after midnight. Seas around 2 ft in the evening, then 1 foot or less. Wave Detail: E 2 ft at 9 seconds and NE 1 ft at 5 seconds, becoming NE 1 ft at 5 seconds and SW 1 ft at 6 seconds. .FRI...N winds around 5 kt, becoming SE in the afternoon. Seas 1 foot or less. Wave Detail: NE 1 ft at 5 seconds and SW 1 ft at 5 seconds. .FRI NIGHT...S winds 5 to 10 kt, becoming SW after midnight. Seas 1 foot or less. Wave Detail: S 1 ft at 2 seconds and E 1 ft at 3 seconds. .SAT THROUGH SUN NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ233-250600- Vineyard Sound- 104 PM EDT Wed Apr 24 2024 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH THURSDAY MORNING... .THIS AFTERNOON...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 5 seconds and SE 2 ft at 10 seconds. A slight chance of showers. Vsby 1 to 3 NM. .TONIGHT...NW winds 15 to 20 kt, becoming N after midnight. Gusts up to 25 kt. Seas 2 to 3 ft. Wave Detail: N 2 ft at 4 seconds and SW 2 ft at 6 seconds. .THU...N winds 10 to 15 kt with gusts up to 20 kt, becoming E 5 to 10 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: N 2 ft at 3 seconds and W 2 ft at 6 seconds. .THU NIGHT...S winds 5 to 10 kt, becoming W after midnight. Seas around 2 ft in the evening, then 1 foot or less. Wave Detail: NE 1 ft at 3 seconds and S 1 ft at 5 seconds, becoming E 1 ft at 3 seconds and SW 1 ft at 4 seconds. .FRI...N winds around 5 kt, becoming SE in the afternoon. Seas 1 foot or less. Wave Detail: NE 1 ft at 3 seconds and W 1 ft at 4 seconds. .FRI NIGHT...SW winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: E 1 ft at 3 seconds and S 1 ft at 3 seconds. .SAT THROUGH SUN NIGHT...SW winds 10 to 15 kt with gusts up to 20 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. $$ ANZ234-250600- Buzzards Bay- 104 PM EDT Wed Apr 24 2024 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH THURSDAY MORNING... .THIS AFTERNOON...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 5 seconds and SE 2 ft at 10 seconds. A chance of showers with isolated tstms. Vsby 1 to 3 NM. .TONIGHT...NW winds 15 to 20 kt, becoming N after midnight. Gusts up to 25 kt. Seas around 2 ft. Wave Detail: N 2 ft at 4 seconds and W 2 ft at 6 seconds. .THU...N winds 5 to 10 kt with gusts up to 20 kt, becoming SE in the afternoon. Seas around 2 ft. Wave Detail: N 2 ft at 3 seconds and W 2 ft at 6 seconds. .THU NIGHT...S winds 5 to 10 kt, becoming W after midnight. Seas around 2 ft in the evening, then 1 foot or less. Wave Detail: S 1 ft at 4 seconds and NE 1 ft at 4 seconds, becoming SW 1 ft at 4 seconds and NE 1 ft at 4 seconds. .FRI...N winds around 5 kt, becoming SE in the afternoon. Seas 1 foot or less. Wave Detail: SW 1 ft at 3 seconds and NE 1 ft at 4 seconds. .FRI NIGHT...SW winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: E 1 ft at 3 seconds and S 1 ft at 3 seconds. .SAT THROUGH SUN NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ235-250600- Rhode Island Sound- 104 PM EDT Wed Apr 24 2024 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH THURSDAY MORNING... .THIS AFTERNOON...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. Wave Detail: SE 4 ft at 11 seconds and SW 3 ft at 6 seconds. A slight chance of showers. Vsby 1 to 3 NM. .TONIGHT...NW winds 15 to 20 kt, becoming N after midnight. Gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail: NW 4 ft at 6 seconds and SE 4 ft at 10 seconds. .THU...NE winds 10 to 15 kt with gusts up to 20 kt, becoming SE 5 to 10 kt in the afternoon. Seas 2 to 4 ft. Wave Detail: SW 3 ft at 7 seconds and N 2 ft at 3 seconds. .THU NIGHT...S winds 5 to 10 kt, becoming W after midnight. Seas around 2 ft in the evening, then 1 foot or less. Wave Detail: S 2 ft at 7 seconds and E 1 ft at 3 seconds, becoming E 1 ft at 3 seconds and SW 1 ft at 5 seconds. .FRI...N winds 5 to 10 kt, becoming S in the afternoon. Seas 1 foot or less. Wave Detail: NE 1 ft at 2 seconds and SW 1 ft at 5 seconds. .FRI NIGHT...SW winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: SE 1 ft at 3 seconds and SE 1 ft at 8 seconds. .SAT THROUGH SUN NIGHT...SW winds 10 to 15 kt with gusts up to 20 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. $$ ANZ237-250600- Block Island Sound- 104 PM EDT Wed Apr 24 2024 .THIS AFTERNOON...SW winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: SE 4 ft at 11 seconds and SW 2 ft at 5 seconds. A slight chance of showers. .TONIGHT...NW winds 10 to 15 kt, becoming N 15 to 20 kt after midnight. Gusts up to 25 kt. Seas 3 to 4 ft. Wave Detail: SE 4 ft at 10 seconds and SW 3 ft at 6 seconds. .THU...NE winds 10 to 15 kt with gusts up to 20 kt, becoming SE 5 to 10 kt in the afternoon. Seas 2 to 4 ft. Wave Detail: E 3 ft at 9 seconds and NE 2 ft at 4 seconds. .THU NIGHT...S winds 5 to 10 kt, becoming W after midnight. Seas around 2 ft in the evening, then 1 foot or less. Wave Detail: E 2 ft at 9 seconds and E 1 ft at 3 seconds, becoming E 1 ft at 3 seconds and SW 1 ft at 6 seconds. .FRI...NE winds around 5 kt, becoming S in the afternoon. Seas 1 foot or less. Wave Detail: NE 1 ft at 2 seconds and S 1 ft at 6 seconds. .FRI NIGHT...SW winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: SE 1 ft at 3 seconds and SE 1 ft at 8 seconds. .SAT THROUGH SUN NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ230-250600- Boston Harbor- 104 PM EDT Wed Apr 24 2024 .THIS AFTERNOON...W winds 10 to 15 kt with gusts up to 20 kt. Waves around 2 ft. A chance of showers. .TONIGHT...NW winds 20 to 25 kt, becoming N 15 to 20 kt after midnight. Gusts up to 30 kt. Waves 2 to 3 ft. .THU...NW winds 5 to 10 kt, becoming SE 10 to 15 kt in the afternoon. Waves around 2 ft. .THU NIGHT...S winds 5 to 10 kt, becoming W after midnight. Waves around 2 ft in the evening, then 1 foot or less. .FRI...N winds 5 to 10 kt, becoming E 10 to 15 kt in the afternoon. Waves 1 foot or less. .FRI NIGHT...S winds 10 to 15 kt, becoming SW after midnight. Waves around 2 ft. .SAT...SW winds 5 to 10 kt. Waves around 2 ft. .SAT NIGHT AND SUN...SW winds 10 to 15 kt. Gusts up to 20 kt. Waves around 2 ft. A chance of showers. .SUN NIGHT...SW 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. $$ ANZ236-250600- Narragansett Bay- 104 PM EDT Wed Apr 24 2024 .THIS AFTERNOON...W winds 10 to 15 kt with gusts up to 20 kt. Waves 2 to 3 ft. A chance of showers with isolated tstms. Vsby 1 to 3 NM. .TONIGHT...N winds 10 to 15 kt with gusts up to 25 kt. Waves 2 to 3 ft. .THU...N winds 10 to 15 kt with gusts up to 20 kt, becoming S 5 to 10 kt in the afternoon. Waves around 2 ft. .THU NIGHT...S winds 5 to 10 kt, becoming W after midnight. Waves around 2 ft in the evening, then 1 foot or less. .FRI...N winds around 5 kt, becoming S 10 to 15 kt in the afternoon. Waves 1 foot or less. .FRI NIGHT...S winds 10 to 15 kt, becoming SW 5 to 10 kt after midnight. Waves 1 foot or less. .SAT...SW winds 5 to 10 kt with gusts up to 20 kt. Waves 1 foot or less. .SAT NIGHT AND SUN...SW winds 10 to 15 kt with gusts up to 20 kt. Waves around 2 ft. A chance of showers. .SUN NIGHT...SW winds 5 to 10 kt. Waves around 2 ft. Winds and waves higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ 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

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