####018018707#### FZUS51 KBOX 212020 CWFBOX Coastal Waters Forecast for Massachusetts and Rhode Island National Weather Service Boston/Norton MA 419 PM EDT Sun Apr 21 2024 Coastal waters from the Merrimack River MA to Watch Hill RI out to 25 NM ANZ200-220900- 419 PM EDT Sun Apr 21 2024 .Synopsis for Massachusetts and Rhode Island coastal waters... High pres generally dominates weather conditions through Tue. Northwest breezes around 20 to 25 kt are possible Mon, decreasing winds expected Tue. A cold front will cross the region Wed into Wed night with a round of showers. Gusty northwest winds return behind this front for Thurs, with high pres ridging in for Fri and Sat. $$ ANZ250-220900- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 419 PM EDT Sun Apr 21 2024 .TONIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 3 seconds and SE 2 ft at 7 seconds. .MON...NW winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt in the afternoon. Seas 2 to 4 ft. Wave Detail: NW 3 ft at 4 seconds and SE 2 ft at 7 seconds. .MON NIGHT...S winds around 5 kt, increasing to 5 to 10 kt after midnight. Seas around 2 ft. Wave Detail: NW 1 ft at 4 seconds and SE 1 ft at 7 seconds. .TUE...S winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 25 kt in the afternoon. Seas 2 to 4 ft. Wave Detail: S 3 ft at 3 seconds and SE 2 ft at 10 seconds. .TUE NIGHT...S winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: S 4 ft at 4 seconds and E 1 ft at 10 seconds. .WED...S winds 10 to 15 kt with gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail: S 3 ft at 4 seconds and SE 2 ft at 10 seconds. A chance of showers. .WED NIGHT...NW winds 20 to 25 kt with gusts up to 30 kt. Seas 5 to 7 ft. A chance of showers in the evening. .THU...NW winds 15 to 20 kt with gusts up to 30 kt. Seas 4 to 6 ft. .THU NIGHT AND FRI...W winds 10 to 15 kt. Gusts up to 20 kt. Seas 2 to 4 ft. .FRI NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ251-220900- Massachusetts Bay and Ipswich Bay- 419 PM EDT Sun Apr 21 2024 .TONIGHT...W winds 10 to 15 kt. Gusts up to 20 kt after midnight. Seas around 2 ft. Wave Detail: W 2 ft at 3 seconds and SE 1 ft at 7 seconds. .MON...NW winds 10 to 15 kt with gusts up to 20 kt, becoming N 5 to 10 kt in the afternoon. Seas around 2 ft. Wave Detail: NW 2 ft at 3 seconds and SE 1 ft at 7 seconds. .MON NIGHT...S winds around 5 kt. Seas around 2 ft in the evening, then 1 foot or less. Wave Detail: NW 1 ft at 3 seconds and SE 1 ft at 6 seconds, becoming SW 1 ft at 2 seconds and SE 1 ft at 4 seconds. .TUE...S winds 5 to 10 kt, increasing to 15 to 20 kt with gusts up to 25 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: S 3 ft at 3 seconds and E 1 ft at 10 seconds. .TUE NIGHT...S winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 4 seconds and E 1 ft at 10 seconds. .WED...SW winds around 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: S 3 ft at 4 seconds and E 1 ft at 4 seconds. A chance of showers. .WED NIGHT...NW winds 20 to 25 kt, diminishing to 15 to 20 kt after midnight. Gusts up to 30 kt. Seas 3 to 5 ft. A chance of showers in the evening. .THU AND THU NIGHT...NW winds 15 to 20 kt with gusts up to 30 kt, diminishing to 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. .FRI AND FRI NIGHT...NW winds around 10 kt, becoming SW. 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. $$ ANZ231-220900- Cape Cod Bay- 419 PM EDT Sun Apr 21 2024 .TONIGHT...W winds 5 to 10 kt. Gusts up to 20 kt after midnight. Seas around 2 ft. Wave Detail: SW 1 ft at 3 seconds and SE 1 ft at 7 seconds. .MON...NW winds 10 to 15 kt with gusts up to 20 kt, becoming N 5 to 10 kt in the afternoon. Seas around 2 ft. Wave Detail: NW 2 ft at 3 seconds and SE 1 ft at 6 seconds. .MON NIGHT...S winds around 5 kt. Seas 1 foot or less. Wave Detail: NW 1 ft at 4 seconds and SE 1 ft at 6 seconds. .TUE...S winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: S 1 ft at 3 seconds and S 1 ft at 6 seconds. .TUE NIGHT...S winds around 10 kt. Seas 1 foot or less. Wave Detail: S 1 ft at 3 seconds and E 1 ft at 10 seconds. .WED...SW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: S 2 ft at 3 seconds and E 1 ft at 4 seconds. A chance of showers. .WED NIGHT...NW winds 15 to 20 kt with gusts up to 30 kt. Seas 3 to 5 ft. A chance of showers in the evening. .THU...NW winds 15 to 20 kt with gusts up to 30 kt. Seas 2 to 4 ft. .THU NIGHT THROUGH FRI NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ254-220900- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm- 419 PM EDT Sun Apr 21 2024 .TONIGHT...SW winds around 10 kt, becoming NW with gusts up to 20 kt after midnight. Seas 2 to 3 ft. Wave Detail: W 2 ft at 4 seconds and SE 2 ft at 7 seconds. .MON...NW winds 10 to 15 kt. Gusts up to 20 kt in the morning. Seas 2 to 4 ft. Wave Detail: NW 2 ft at 4 seconds and SE 2 ft at 6 seconds. .MON NIGHT...S winds around 5 kt. Seas 2 to 3 ft. Wave Detail: NW 2 ft at 4 seconds and SE 2 ft at 11 seconds. .TUE...SE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: S 2 ft at 8 seconds and SE 2 ft at 11 seconds. .TUE NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 2 ft at 5 seconds and NE 1 ft at 4 seconds. .WED...S winds 10 to 15 kt, becoming SW 15 to 20 kt in the afternoon. Gusts up to 25 kt. Seas 2 to 4 ft, building to 4 to 5 ft in the afternoon. Wave Detail: S 2 ft at 5 seconds and SE 2 ft at 9 seconds, becoming S 3 ft at 4 seconds and SE 3 ft at 10 seconds. .WED NIGHT...NW winds 15 to 20 kt with gusts up to 30 kt. Seas 5 to 7 ft. .THU...NW winds 15 to 20 kt with gusts up to 30 kt. Seas 5 to 7 ft. .THU NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. .FRI AND FRI NIGHT...NW winds around 10 kt, becoming SW. Seas 2 to 4 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. $$ ANZ255-220900- Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket- 419 PM EDT Sun Apr 21 2024 .TONIGHT...W winds 10 to 15 kt, becoming NW after midnight. Gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: W 2 ft at 4 seconds and SE 2 ft at 7 seconds. .MON...NW winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: NW 2 ft at 4 seconds and SE 1 ft at 6 seconds. .MON NIGHT...S winds around 5 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 9 seconds and W 1 ft at 4 seconds. .TUE...SE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: S 2 ft at 4 seconds and SE 2 ft at 9 seconds. .TUE NIGHT...SE winds 5 to 10 kt, becoming S 10 to 15 kt after midnight. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 5 seconds and NE 1 ft at 4 seconds. .WED...S winds 15 to 20 kt with gusts up to 30 kt. Seas 3 to 5 ft. Wave Detail: SW 4 ft at 6 seconds and SE 3 ft at 9 seconds. .WED NIGHT...NW winds 15 to 20 kt with gusts up to 30 kt. Seas 4 to 6 ft. .THU...NW winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 6 ft. .THU NIGHT AND FRI...W winds 10 to 15 kt. Gusts up to 20 kt. Seas 2 to 4 ft. .FRI NIGHT...SW winds 10 to 15 kt. Seas around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ256-220900- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island- 419 PM EDT Sun Apr 21 2024 .TONIGHT...W winds 10 to 15 kt, becoming NW after midnight. Gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 4 seconds and SE 2 ft at 7 seconds. .MON...NW winds 10 to 15 kt with gusts up to 20 kt, becoming W 5 to 10 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: NW 2 ft at 4 seconds and SE 1 ft at 7 seconds. .MON NIGHT...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 9 seconds and SW 1 ft at 4 seconds. .TUE...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: S 2 ft at 8 seconds and SE 2 ft at 9 seconds. .TUE NIGHT...S winds 10 to 15 kt. Gusts up to 20 kt after midnight. Seas 2 to 3 ft. Wave Detail: S 3 ft at 5 seconds and SE 1 ft at 10 seconds. .WED...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail: SW 5 ft at 6 seconds and SE 2 ft at 9 seconds. A chance of showers. .WED NIGHT...NW winds 15 to 20 kt with gusts up to 30 kt. Seas 4 to 6 ft. A chance of showers in the evening. .THU...NW winds around 15 kt with gusts up to 25 kt. Seas 3 to 5 ft. .THU NIGHT AND FRI...W winds 10 to 15 kt. Gusts up to 20 kt. Seas 2 to 4 ft. .FRI 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. $$ ANZ232-220900- Nantucket Sound- 419 PM EDT Sun Apr 21 2024 .TONIGHT...W winds 10 to 15 kt, becoming NW after midnight. Gusts up to 20 kt. Seas around 2 ft. Wave Detail: W 2 ft at 3 seconds and SE 1 ft at 6 seconds. .MON...NW winds 10 to 15 kt with gusts up to 20 kt, becoming N 5 to 10 kt in the afternoon. Seas around 2 ft. Wave Detail: NW 2 ft at 3 seconds and SE 1 ft at 6 seconds. .MON NIGHT...S winds around 5 kt. Seas 1 foot or less. Wave Detail: SW 1 ft at 3 seconds and SE 1 ft at 7 seconds. .TUE...S winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: S 1 ft at 3 seconds and E 1 ft at 10 seconds. .TUE NIGHT...S winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: S 1 ft at 3 seconds and E 1 ft at 10 seconds. .WED...S winds 10 to 15 kt, becoming SW 15 to 20 kt in the afternoon. Gusts up to 25 kt. Seas 2 to 3 ft. Wave Detail: S 2 ft at 4 seconds and E 1 ft at 4 seconds. A chance of showers. .WED NIGHT...NW winds 15 to 20 kt with gusts up to 30 kt. Seas 2 to 3 ft. .THU THROUGH FRI NIGHT...SW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ233-220900- Vineyard Sound- 419 PM EDT Sun Apr 21 2024 .TONIGHT...W winds 10 to 15 kt, becoming NW after midnight. Gusts up to 20 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and SE 1 ft at 7 seconds. .MON...NW winds around 10 kt with gusts up to 20 kt, becoming W in the afternoon. Seas around 2 ft in the morning, then 1 foot or less. Wave Detail: W 1 ft at 4 seconds and SE 1 ft at 7 seconds. .MON NIGHT...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW 1 ft at 4 seconds and SE 1 ft at 7 seconds. .TUE...S winds 5 to 10 kt, increasing to 10 to 15 kt in the afternoon. Seas 1 foot or less. Wave Detail: S 1 ft at 4 seconds and SE 1 ft at 9 seconds. .TUE NIGHT...S winds 10 to 15 kt. Seas 1 foot or less, then around 2 ft after midnight. Wave Detail: S 1 ft at 4 seconds and SE 1 ft at 9 seconds, becoming S 2 ft at 4 seconds and SE 1 ft at 10 seconds. .WED AND WED NIGHT...NW winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: SW 3 ft at 5 seconds and SE 1 ft at 9 seconds. A chance of showers. .THU THROUGH FRI NIGHT...SW winds 10 to 15 kt with gusts up to 25 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. $$ ANZ234-220900- Buzzards Bay- 419 PM EDT Sun Apr 21 2024 .TONIGHT...W winds 10 to 15 kt with gusts up to 20 kt, becoming NW after midnight. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and SE 1 ft at 7 seconds. .MON...NW winds around 10 kt, becoming SW in the afternoon. Seas 1 foot or less. Wave Detail: NW 1 ft at 3 seconds and SE 1 ft at 7 seconds. .MON NIGHT...S winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: SW 1 ft at 4 seconds and SE 1 ft at 7 seconds. .TUE...S winds 5 to 10 kt, increasing to 10 to 15 kt in the afternoon. Seas 1 foot or less. Wave Detail: SW 1 ft at 3 seconds and S 1 ft at 7 seconds. .TUE NIGHT...S winds 10 to 15 kt. Seas 1 foot or less. Wave Detail: S 1 ft at 4 seconds and SE 1 ft at 10 seconds. .WED AND WED NIGHT...NW winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: SW 3 ft at 5 seconds and E 1 ft at 4 seconds. A chance of showers. .THU THROUGH FRI NIGHT...SW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ235-220900- Rhode Island Sound- 419 PM EDT Sun Apr 21 2024 .TONIGHT...W winds 10 to 15 kt, becoming NW after midnight. Gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 4 seconds and SE 2 ft at 7 seconds. .MON...NW winds 10 to 15 kt with gusts up to 20 kt, becoming SW 5 to 10 kt in the afternoon. Seas around 2 ft. Wave Detail: W 2 ft at 4 seconds and SE 1 ft at 7 seconds. .MON NIGHT...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: S 2 ft at 9 seconds and SW 1 ft at 4 seconds. .TUE...S winds 5 to 10 kt, increasing to 10 to 15 kt in the afternoon. Seas around 2 ft in the morning, then 1 foot or less. Wave Detail: S 2 ft at 8 seconds and SW 1 ft at 3 seconds, becoming S 1 ft at 4 seconds and SE 1 ft at 9 seconds. .TUE NIGHT...S winds 10 to 15 kt. Seas around 2 ft. Wave Detail: S 2 ft at 5 seconds and SE 1 ft at 9 seconds. .WED AND WED NIGHT...NW winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: SW 4 ft at 7 seconds and NW 3 ft at 4 seconds. A chance of showers. .THU AND THU NIGHT...W winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. .FRI AND FRI NIGHT...W winds around 10 kt, becoming SW. 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. $$ ANZ237-220900- Block Island Sound- 419 PM EDT Sun Apr 21 2024 .TONIGHT...W winds 5 to 10 kt, becoming NW after midnight. Seas around 2 ft. Wave Detail: W 2 ft at 3 seconds and SE 2 ft at 7 seconds. .MON...NW winds around 10 kt, becoming W in the afternoon. Seas around 2 ft. Wave Detail: W 1 ft at 3 seconds and SE 1 ft at 7 seconds. .MON NIGHT...SW winds 5 to 10 kt, becoming S after midnight. Seas around 2 ft. Wave Detail: S 2 ft at 9 seconds and SW 1 ft at 3 seconds. .TUE...S winds 5 to 10 kt. Seas around 2 ft in the morning, then 1 foot or less. Wave Detail: S 2 ft at 8 seconds and SW 1 ft at 3 seconds, becoming S 1 ft at 4 seconds and SE 1 ft at 9 seconds. .TUE NIGHT...S winds around 10 kt. Seas around 2 ft. Wave Detail: S 2 ft at 4 seconds and SE 1 ft at 9 seconds. .WED AND WED NIGHT...NW winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: S 4 ft at 7 seconds and W 3 ft at 4 seconds. A chance of showers. .THU THROUGH FRI NIGHT...SW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ230-220900- Boston Harbor- 419 PM EDT Sun Apr 21 2024 .TONIGHT...W winds 10 to 15 kt. Waves 1 foot or less. .MON...NW winds 10 to 15 kt, diminishing to 5 to 10 kt in the afternoon. Waves 1 foot or less. .MON NIGHT...S winds around 5 kt. Waves 1 foot or less. .TUE...S winds 5 to 10 kt, increasing to 15 to 20 kt with gusts up to 25 kt in the afternoon. Waves 1 foot or less, then around 2 ft in the afternoon. .TUE NIGHT...S winds 15 to 20 kt with gusts up to 25 kt. Waves around 2 ft. .WED AND WED NIGHT...NW winds 20 to 25 kt. Waves around 2 ft. A chance of showers. .THU THROUGH FRI NIGHT...SW winds 10 to 15 kt with gusts up to 25 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. $$ ANZ236-220900- Narragansett Bay- 419 PM EDT Sun Apr 21 2024 .TONIGHT...W winds 5 to 10 kt. Waves around 2 ft. .MON...NW winds 5 to 10 kt. Waves around 2 ft in the morning, then 1 foot or less. .MON NIGHT...SW winds 5 to 10 kt, becoming S after midnight. Waves 1 foot or less. .TUE...S winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Waves 1 foot or less. .TUE NIGHT...S winds 10 to 15 kt. Gusts up to 20 kt in the evening. Waves 1 foot or less, then around 2 ft after midnight. .WED AND WED NIGHT...NW winds 10 to 15 kt with gusts up to 25 kt. Waves 2 to 3 ft. A chance of showers. .THU THROUGH FRI NIGHT...SW winds 10 to 15 kt with gusts up to 25 kt. Waves 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ 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