Coastal Waters Forecast
Issued by NWS Boston, MA

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728 FZUS51 KBOX 020805 CWFBOX Coastal Waters Forecast for Massachusetts and Rhode Island National Weather Service Boston/Norton MA 404 AM EDT Thu May 2 2024 Coastal waters from the Merrimack River MA to Watch Hill RI out to 25 NM ANZ200-022100- 404 AM EDT Thu May 2 2024 .Synopsis for Massachusetts and Rhode Island coastal waters... High pres will move offshore today. Low pres will cross New Eng and the waters Thu afternoon and evening. High pres over the Maritimes will build south into New England Fri and Sat, then head to Nova Scotia Sun. A weak front will move into the region Mon. $$ ANZ250-022100- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 404 AM EDT Thu May 2 2024 .TODAY...S winds 10 to 15 kt. Gusts up to 20 kt this afternoon. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 4 seconds and E 1 ft at 11 seconds. A chance of showers this morning. A slight chance of showers this afternoon. Vsby 1 to 3 NM. .TONIGHT...E winds 5 to 10 kt, becoming NE 10 to 15 kt after midnight. Seas 2 to 3 ft. Wave Detail: SE 2 ft at 4 seconds and E 1 ft at 10 seconds. A chance of showers in the evening with vsby 1 NM or less. .FRI...NE winds 10 to 15 kt, diminishing to 5 to 10 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: NE 2 ft at 4 seconds and S 1 ft at 6 seconds. .FRI NIGHT...NE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 2 ft at 6 seconds and E 1 ft at 10 seconds. .SAT...NE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: NE 2 ft at 5 seconds and E 1 ft at 10 seconds. .SAT NIGHT...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 2 ft at 6 seconds and E 1 ft at 10 seconds. A chance of. .SUN THROUGH MON...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. A chance of showers. .MON NIGHT...SW winds around 10 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ251-022100- Massachusetts Bay and Ipswich Bay- 404 AM EDT Thu May 2 2024 .TODAY...S winds 5 to 10 kt, becoming SE 10 to 15 kt this afternoon. Seas around 2 ft. Wave Detail: SE 2 ft at 4 seconds and E 1 ft at 11 seconds. A slight chance of showers this morning. A chance of showers this afternoon. .TONIGHT...NE winds 10 to 15 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 4 seconds and E 1 ft at 10 seconds. A chance of showers in the evening with vsby 1 to 3 NM. .FRI...NE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: NE 2 ft at 4 seconds and E 1 ft at 10 seconds. .FRI NIGHT...SE winds around 5 kt, becoming N after midnight. Seas around 2 ft. Wave Detail: E 2 ft at 5 seconds and E 1 ft at 9 seconds. .SAT...NE winds 5 to 10 kt, becoming E 10 to 15 kt in the afternoon. Seas around 2 ft. Wave Detail: NE 2 ft at 5 seconds and E 1 ft at 9 seconds. A chance of. .SAT NIGHT...E winds 10 to 15 kt, becoming SE 5 to 10 kt after midnight. Seas around 2 ft. Wave Detail: E 2 ft at 6 seconds and E 1 ft at 10 seconds. .SUN THROUGH MON...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. A chance of showers. .MON NIGHT...W 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. $$ ANZ231-022100- Cape Cod Bay- 404 AM EDT Thu May 2 2024 .TODAY...S winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt this afternoon. Seas 1 foot or less. Wave Detail: S 1 ft at 3 seconds and E 1 ft at 4 seconds. A slight chance of showers. Vsby 1 to 3 NM. .TONIGHT...E winds 5 to 10 kt, becoming NE 10 to 15 kt after midnight. Seas 1 foot or less, then around 2 ft after midnight. Wave Detail: SE 1 ft at 4 seconds and E 1 ft at 10 seconds, becoming NE 1 ft at 3 seconds and S 1 ft at 5 seconds. A chance of showers in the evening with vsby 1 NM or less. .FRI...NE winds 10 to 15 kt. Seas around 2 ft. Wave Detail: NE 1 ft at 3 seconds and E 1 ft at 10 seconds. .FRI NIGHT...NE winds around 5 kt. Seas around 2 ft in the evening, then 1 foot or less. Wave Detail: N 1 ft at 4 seconds and E 1 ft at 10 seconds, becoming NE 1 ft at 4 seconds and E 1 ft at 10 seconds. .SAT...NE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: NE 1 ft at 4 seconds and E 1 ft at 10 seconds. .SAT NIGHT...E winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E 1 ft at 3 seconds and E 1 ft at 10 seconds. A chance of. .SUN THROUGH MON...SW winds 5 to 10 kt with gusts up to 20 kt. Seas around 2 ft. A chance of showers. .MON NIGHT...SW winds around 10 kt. Seas around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ254-022100- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm- 404 AM EDT Thu May 2 2024 .TODAY...S winds 10 to 15 kt. Gusts up to 20 kt this afternoon. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 5 seconds and E 2 ft at 11 seconds. A chance of showers this morning. A slight chance of showers this afternoon. Vsby 1 NM or less. .TONIGHT...SE winds 5 to 10 kt, becoming NE 10 to 15 kt with gusts up to 20 kt after midnight. Seas 2 to 3 ft. Wave Detail: E 2 ft at 4 seconds and S 2 ft at 6 seconds. A chance of showers in the evening with vsby 1 NM or less. .FRI...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: NE 3 ft at 4 seconds and S 2 ft at 6 seconds. .FRI NIGHT...NE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: NE 3 ft at 5 seconds and S 1 ft at 5 seconds. .SAT...NE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: NE 2 ft at 5 seconds and W 1 ft at 5 seconds. .SAT NIGHT...E winds 5 to 10 kt. Seas around 3 ft. Wave Detail: E 3 ft at 6 seconds and E 1 ft at 10 seconds. A chance of. .SUN THROUGH MON...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. A chance of showers. .MON NIGHT...SW winds around 10 kt. Seas 3 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. $$ ANZ255-022100- Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket- 404 AM EDT Thu May 2 2024 .TODAY...S winds 10 to 15 kt. Gusts up to 20 kt this afternoon. Seas 2 to 3 ft. Wave Detail: S 3 ft at 6 seconds and E 1 ft at 5 seconds. A slight chance of showers this afternoon with vsby 1 NM or less. .TONIGHT...W winds 5 to 10 kt, becoming NE 10 to 15 kt with gusts up to 20 kt after midnight. Seas 2 to 3 ft. Wave Detail: S 3 ft at 6 seconds and NE 2 ft at 5 seconds. .FRI...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: NE 3 ft at 4 seconds and S 2 ft at 6 seconds. .FRI NIGHT...NE winds 10 to 15 kt, diminishing to 5 to 10 kt after midnight. Seas 2 to 3 ft. Wave Detail: NE 3 ft at 5 seconds and SW 1 ft at 5 seconds. .SAT AND SAT NIGHT...E winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at 6 seconds and SW 1 ft at 5 seconds. .SUN THROUGH MON...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Wave Detail: SE 3 ft at 5 seconds and E 3 ft at 11 seconds. A chance of showers. .MON NIGHT...SW winds 10 to 15 kt. Seas 2 to 4 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ256-022100- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island- 404 AM EDT Thu May 2 2024 .TODAY...S winds 5 to 10 kt, becoming SW 10 to 15 kt this afternoon. Seas 2 to 3 ft. Wave Detail: S 3 ft at 7 seconds and E 1 ft at 5 seconds. .TONIGHT...W winds around 10 kt, becoming NE with gusts up to 20 kt after midnight. Seas 2 to 3 ft. Wave Detail: NE 3 ft at 5 seconds and S 2 ft at 6 seconds. .FRI...NE winds 10 to 15 kt. Gusts up to 20 kt in the morning. Seas 2 to 3 ft. Wave Detail: NE 3 ft at 4 seconds and S 2 ft at 6 seconds. .FRI NIGHT...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 2 ft at 5 seconds and S 1 ft at 5 seconds. .SAT AND SAT NIGHT...E winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: NE 2 ft at 6 seconds and E 1 ft at 10 seconds. A chance of through the day. .SUN THROUGH MON...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Wave Detail: SE 3 ft at 6 seconds and E 3 ft at 11 seconds. A chance of showers. .MON NIGHT...SW winds 10 to 15 kt. Seas around 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. $$ ANZ232-022100- Nantucket Sound- 404 AM EDT Thu May 2 2024 .TODAY...S winds 10 to 15 kt. Gusts up to 20 kt this afternoon. Seas 1 foot or less, then around 2 ft this afternoon. Wave Detail: E 1 ft at 5 seconds and S 1 ft at 7 seconds, becoming SW 2 ft at 3 seconds and E 1 ft at 4 seconds. A slight chance of showers this afternoon with vsby 1 NM or less. .TONIGHT...W winds 5 to 10 kt, becoming NE 10 to 15 kt with gusts up to 20 kt after midnight. Seas 1 foot or less, then around 2 ft after midnight. Wave Detail: SW 1 ft at 4 seconds and E 1 ft at 4 seconds, becoming NE 2 ft at 4 seconds and SW 1 ft at 5 seconds. A chance of showers in the evening with vsby 1 NM or less. .FRI...NE winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: NE 2 ft at 3 seconds and S 1 ft at 5 seconds. .FRI NIGHT...NE winds 5 to 10 kt. Seas around 2 ft in the evening, then 1 foot or less. Wave Detail: NE 2 ft at 4 seconds and SW 1 ft at 5 seconds, becoming E 1 ft at 5 seconds and SW 1 ft at 5 seconds. .SAT AND SAT NIGHT...E winds 5 to 10 kt. Seas around 2 ft. Wave Detail: NE 2 ft at 5 seconds and SW 1 ft at 5 seconds. A chance of. .SUN THROUGH MON...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: S 2 ft at 3 seconds and E 2 ft at 11 seconds. A chance of showers. .MON NIGHT...SW winds around 10 kt. Seas around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ233-022100- Vineyard Sound- 404 AM EDT Thu May 2 2024 .TODAY...S winds 5 to 10 kt, becoming SW 10 to 15 kt this afternoon. Gusts up to 20 kt. Seas 1 foot or less, then around 2 ft this afternoon. Wave Detail: E 1 ft at 5 seconds and S 1 ft at 6 seconds, becoming SW 2 ft at 4 seconds and E 1 ft at 5 seconds. .TONIGHT...NW winds 5 to 10 kt, becoming NE 10 to 15 kt with gusts up to 20 kt after midnight. Seas 1 foot or less, then around 2 ft after midnight. Wave Detail: E 1 ft at 5 seconds and SW 1 ft at 5 seconds, becoming NE 1 ft at 4 seconds and SW 1 ft at 5 seconds. .FRI...NE winds 10 to 15 kt. Gusts up to 20 kt in the morning. Seas around 2 ft in the morning, then 1 foot or less. Wave Detail: NE 1 ft at 3 seconds and SW 1 ft at 5 seconds. .FRI NIGHT...NE winds 5 to 10 kt, diminishing to around 5 kt 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 S 1 ft at 5 seconds. .SAT AND SAT NIGHT...E winds 10 to 15 kt. Seas 1 foot or less. Wave Detail: NE 1 ft at 3 seconds and S 1 ft at 5 seconds. .SUN THROUGH MON...SW winds 5 to 10 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 4 seconds and E 1 ft at 11 seconds. A chance of showers. .MON NIGHT...SW winds around 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. $$ ANZ234-022100- Buzzards Bay- 404 AM EDT Thu May 2 2024 .TODAY...S winds 5 to 10 kt with gusts up to 20 kt. Seas 1 foot or less. Wave Detail: E 1 ft at 5 seconds and S 1 ft at 6 seconds. .TONIGHT...NW winds 5 to 10 kt, becoming NE 10 to 15 kt with gusts up to 20 kt after midnight. Seas 1 foot or less, then around 2 ft after midnight. Wave Detail: SW 1 ft at 4 seconds and E 1 ft at 5 seconds, becoming NE 1 ft at 4 seconds and SW 1 ft at 5 seconds. .FRI...NE winds 10 to 15 kt. Gusts up to 20 kt in the morning. Seas around 2 ft in the morning, then 1 foot or less. Wave Detail: NE 1 ft at 3 seconds and SW 1 ft at 5 seconds. .FRI NIGHT...NE winds 5 to 10 kt, diminishing to around 5 kt after midnight. Seas 1 foot or less. Wave Detail: NE 1 ft at 3 seconds and SW 1 ft at 5 seconds. .SAT AND SAT NIGHT...E winds 10 to 15 kt. Seas 1 foot or less. Wave Detail: NE 1 ft at 2 seconds and S 1 ft at 5 seconds. .SUN THROUGH MON...SW winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: SE 1 ft at 4 seconds and E 1 ft at 11 seconds. A chance of showers. .MON NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ235-022100- Rhode Island Sound- 404 AM EDT Thu May 2 2024 .TODAY...S winds 5 to 10 kt, becoming SW 10 to 15 kt this afternoon. Seas around 2 ft. Wave Detail: SE 2 ft at 6 seconds and SE 1 ft at 11 seconds. .TONIGHT...W winds 5 to 10 kt, becoming NE 10 to 15 kt with gusts up to 20 kt after midnight. Seas around 2 ft. Wave Detail: NE 2 ft at 5 seconds and S 2 ft at 7 seconds. .FRI...NE winds 10 to 15 kt. Gusts up to 20 kt in the morning. Seas around 2 ft. Wave Detail: NE 2 ft at 3 seconds and S 2 ft at 6 seconds. .FRI NIGHT...NE winds 5 to 10 kt. Seas around 2 ft in the evening, then 1 foot or less. Wave Detail: NE 2 ft at 4 seconds and S 1 ft at 5 seconds, becoming S 1 ft at 5 seconds and NE 1 ft at 5 seconds. .SAT AND SAT NIGHT...E winds 10 to 15 kt. Seas around 2 ft. Wave Detail: NE 2 ft at 5 seconds and S 1 ft at 5 seconds. A chance of. .SUN THROUGH MON...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 5 seconds and SE 1 ft at 11 seconds. A chance of showers. .MON NIGHT...W winds around 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. $$ ANZ237-022100- Block Island Sound- 404 AM EDT Thu May 2 2024 .TODAY...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 6 seconds and E 1 ft at 10 seconds. .TONIGHT...W winds 5 to 10 kt, becoming NE 10 to 15 kt with gusts up to 20 kt after midnight. Seas 2 to 3 ft. Wave Detail: NE 2 ft at 5 seconds and SW 2 ft at 6 seconds. .FRI...NE winds 10 to 15 kt with gusts up to 20 kt, becoming E 5 to 10 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: NE 2 ft at 4 seconds and S 2 ft at 6 seconds. .FRI NIGHT...E winds 5 to 10 kt, becoming NE after midnight. Seas around 2 ft in the evening, then 1 foot or less. Wave Detail: SE 1 ft at 5 seconds and SE 1 ft at 11 seconds. .SAT AND SAT NIGHT...E winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 5 seconds and SE 1 ft at 11 seconds. A chance of. .SUN THROUGH MON...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 2 ft at 5 seconds and E 2 ft at 10 seconds. A chance of showers. .MON NIGHT...W winds 5 to 10 kt. Seas around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ230-022100- Boston Harbor- 404 AM EDT Thu May 2 2024 .TODAY...S winds 5 to 10 kt. Waves around 2 ft. A slight chance of showers this morning. A chance of showers this afternoon. .TONIGHT...NE winds 10 to 15 kt. Waves 2 to 3 ft. A chance of showers in the evening. .FRI...NE winds 5 to 10 kt. Waves around 2 ft. .FRI NIGHT...SE winds 5 to 10 kt, becoming NW after midnight. Waves around 2 ft in the evening, then 1 foot or less. .SAT AND SAT NIGHT...SE winds 10 to 15 kt with gusts up to 20 kt. Waves around 2 ft. A chance of. .SUN THROUGH MON...SW winds 5 to 10 kt. Waves around 2 ft. A chance of showers. .MON NIGHT...W 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. $$ ANZ236-022100- Narragansett Bay- 404 AM EDT Thu May 2 2024 .TODAY...S winds 5 to 10 kt. Waves around 2 ft. .TONIGHT...NW winds 5 to 10 kt, becoming N 10 to 15 kt with gusts up to 20 kt after midnight. Waves around 2 ft. .FRI...NE winds 5 to 10 kt. Gusts up to 20 kt in the morning. Waves around 2 ft. .FRI NIGHT...NE winds 5 to 10 kt. Waves 1 foot or less. .SAT AND SAT NIGHT...E winds 10 to 15 kt. Waves around 2 ft. A chance of. .SUN THROUGH MON...SW winds 5 to 10 kt. Waves around 2 ft. A chance of showers. .MON NIGHT...W winds 5 to 10 kt. Waves around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ 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