Coastal Waters Forecast
Issued by NWS Boston, MA

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735 FZUS51 KBOX 241106 CWFBOX Coastal Waters Forecast for Massachusetts and Rhode Island National Weather Service Boston/Norton MA 705 AM EDT Fri May 24 2024 Coastal waters from the Merrimack River MA to Watch Hill RI out to 25 NM ANZ200-250000- 705 AM EDT Fri May 24 2024 .Synopsis for Massachusetts and Rhode Island coastal waters... High pres nudges into the region today, but builds more firmly overhead on Sat. A front will be nearby on Sun, which could bring hit-or-miss showers and storms. A frontal system lifts toward the waters on Mon and Tue bringing the risk of heavy rain and gusty winds. $$ ANZ250-250000- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 705 AM EDT Fri May 24 2024 .TODAY...W winds 5 to 10 kt, becoming SW 10 to 15 kt with gusts up to 20 kt this afternoon. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 3 seconds and E 1 foot at 7 seconds. .TONIGHT...W winds 10 to 15 kt with gusts up to 20 kt, becoming N 5 to 10 kt after midnight. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 4 seconds and N 1 foot at 3 seconds. .SAT...N winds 5 to 10 kt, becoming SE in the afternoon. Seas around 2 ft. Wave Detail: N 1 foot at 4 seconds and SE 1 foot at 5 seconds. .SAT NIGHT...S winds 10 to 15 kt. Seas around 2 ft. Wave Detail: S 2 ft at 3 seconds and N 1 foot at 3 seconds. .SUN AND SUN NIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: S 2 ft at 3 seconds and SE 1 foot at 9 seconds. .MON...SE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Wave Detail: SE 2 ft at 3 seconds and SE 1 foot at 9 seconds. .MON NIGHT AND TUE...S winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 6 ft. Rain likely. .TUE NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ251-250000- Massachusetts Bay and Ipswich Bay- 705 AM EDT Fri May 24 2024 .TODAY...W winds 5 to 10 kt, becoming SW 10 to 15 kt with gusts up to 20 kt this afternoon. Seas 1 foot or less, then around 2 ft this afternoon. Wave Detail: W 1 foot at 2 seconds and S 1 foot at 3 seconds, becoming SW 1 foot at 3 seconds and E 1 foot at 7 seconds. .TONIGHT...W winds 10 to 15 kt, becoming N 5 to 10 kt after midnight. Seas around 2 ft. Wave Detail: N 1 foot at 2 seconds and S 1 foot at 3 seconds. .SAT...N winds 5 to 10 kt, becoming SE in the afternoon. Seas 1 foot or less, then around 2 ft in the afternoon. Wave Detail: N 1 foot at 3 seconds and S 1 foot at 5 seconds, becoming N 1 foot at 3 seconds and SE 1 foot at 5 seconds. .SAT NIGHT...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE 1 foot at 3 seconds and NE 1 foot at 4 seconds. .SUN AND SUN NIGHT...SE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E 1 foot at 4 seconds and E 1 foot at 9 seconds. .MON...SE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: E 2 ft at 4 seconds and SE 1 foot at 9 seconds. A chance of rain. .MON NIGHT AND TUE...S winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. Rain. .TUE 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. $$ ANZ231-250000- Cape Cod Bay- 705 AM EDT Fri May 24 2024 .TODAY...W winds around 5 kt, becoming SW 10 to 15 kt with gusts up to 20 kt this afternoon. Seas 1 foot or less, then around 2 ft this afternoon. Wave Detail: SW 1 foot at 3 seconds and E 1 foot at 7 seconds, becoming SW 1 foot at 4 seconds and E 1 foot at 7 seconds. Patchy fog this morning with vsby 1 NM or less. .TONIGHT...SW winds 10 to 15 kt, becoming N 5 to 10 kt after midnight. Seas around 2 ft in the evening, then 1 foot or less. Wave Detail: SW 1 foot at 4 seconds and E 1 foot at 7 seconds, becoming N 1 foot at 3 seconds and S 1 foot at 4 seconds. .SAT...N winds around 5 kt, becoming E in the afternoon. Seas 1 foot or less. Wave Detail: N 1 foot at 3 seconds and S 1 foot at 5 seconds. .SAT NIGHT...S winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: S 1 foot at 2 seconds and N 1 foot at 4 seconds. .SUN AND SUN NIGHT...SE winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: SW 1 foot at 3 seconds and NE 1 foot at 4 seconds. .MON...SE winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: SE 1 foot at 3 seconds and SE 1 foot at 9 seconds. .MON NIGHT AND TUE...S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Rain likely. .TUE NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ254-250000- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm- 705 AM EDT Fri May 24 2024 .TODAY...W winds 5 to 10 kt, becoming SW 10 to 15 kt with gusts up to 20 kt this afternoon. Seas 2 to 3 ft. Wave Detail: S 2 ft at 5 seconds and W 1 foot at 3 seconds. Patchy fog. Vsby 1 NM or less. .TONIGHT...SW winds 10 to 15 kt with gusts up to 20 kt, becoming N 5 to 10 kt after midnight. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 4 seconds and E 1 foot at 7 seconds. Patchy fog in the evening. .SAT...N winds 5 to 10 kt, becoming E in the afternoon. Seas around 2 ft. Wave Detail: S 2 ft at 6 seconds and N 1 foot at 3 seconds. .SAT NIGHT...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: S 2 ft at 6 seconds and N 1 foot at 4 seconds. .SUN AND SUN NIGHT...SE winds around 10 kt. Seas around 2 ft. Wave Detail: S 2 ft at 4 seconds and N 1 foot at 4 seconds. .MON...SE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Wave Detail: SE 2 ft at 4 seconds and SE 1 foot at 9 seconds. .MON NIGHT AND TUE...S winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. Rain likely. .TUE NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 5 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. $$ ANZ255-250000- Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket- 705 AM EDT Fri May 24 2024 .TODAY...SW winds 5 to 10 kt, increasing to 10 to 15 kt this afternoon. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 5 seconds and E 1 foot at 7 seconds. Patchy fog. Vsby 1 NM or less. .TONIGHT...SW winds 10 to 15 kt, becoming NW after midnight. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and E 1 foot at 7 seconds. Patchy fog in the evening. .SAT...NE winds 5 to 10 kt, becoming SE in the afternoon. Seas around 2 ft. Wave Detail: SW 2 ft at 6 seconds and N 1 foot at 2 seconds. .SAT NIGHT...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: S 2 ft at 5 seconds and NE 1 foot at 2 seconds. .SUN AND SUN NIGHT...SE winds around 10 kt. Seas around 2 ft. Wave Detail: S 2 ft at 5 seconds and NE 1 foot at 4 seconds. .MON...SE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 4 seconds and SE 2 ft at 9 seconds. .MON NIGHT AND TUE...S winds 15 to 20 kt. Seas 3 to 5 ft. Rain likely. .TUE NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 5 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ256-250000- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island- 705 AM EDT Fri May 24 2024 .TODAY...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and E 1 foot at 7 seconds. Patchy fog. Vsby 1 NM or less. .TONIGHT...SW winds 10 to 15 kt, becoming NW 5 to 10 kt after midnight. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and E 1 foot at 7 seconds. Patchy fog in the evening. .SAT...NE winds 5 to 10 kt, becoming SE in the afternoon. Seas around 2 ft. Wave Detail: S 2 ft at 6 seconds and SE 1 foot at 9 seconds. .SAT NIGHT...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: S 2 ft at 5 seconds and SE 1 foot at 9 seconds. .SUN AND SUN NIGHT...SE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: S 2 ft at 5 seconds and SE 1 foot at 9 seconds. .MON...SE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 4 seconds and SE 2 ft at 9 seconds. A chance of rain. .MON NIGHT AND TUE...S winds 15 to 20 kt, becoming SW 10 to 15 kt. Seas 3 to 5 ft. Rain. .TUE NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 5 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. $$ ANZ232-250000- Nantucket Sound- 705 AM EDT Fri May 24 2024 .TODAY...W winds 5 to 10 kt, becoming SW 10 to 15 kt this afternoon. Seas 1 foot or less, then around 2 ft this afternoon. Wave Detail: W 1 foot at 2 seconds and S 1 foot at 5 seconds, becoming SW 2 ft at 4 seconds and E 1 foot at 7 seconds. Patchy fog this morning with vsby 1 NM or less. .TONIGHT...SW winds 10 to 15 kt, becoming N 5 to 10 kt after midnight. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and N 1 foot at 2 seconds. .SAT...NE winds around 5 kt, becoming SE in the afternoon. Seas 1 foot or less. Wave Detail: N 1 foot at 3 seconds and S 1 foot at 5 seconds. .SAT NIGHT...S winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: S 1 foot at 3 seconds and NE 1 foot at 3 seconds. .SUN AND SUN NIGHT...SE winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: SW 1 foot at 3 seconds and NE 1 foot at 4 seconds. .MON...SE winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 3 seconds and SE 1 foot at 9 seconds. .MON NIGHT AND TUE...S winds around 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Rain likely. .TUE NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ233-250000- Vineyard Sound- 705 AM EDT Fri May 24 2024 .TODAY...SW winds 5 to 10 kt, increasing to 10 to 15 kt this afternoon. Seas around 2 ft. Wave Detail: W 2 ft at 4 seconds and E 1 foot at 7 seconds. Patchy fog this morning with vsby 1 NM or less. .TONIGHT...SW winds 10 to 15 kt, becoming NW 5 to 10 kt after midnight. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and E 1 foot at 7 seconds. .SAT...NE winds around 5 kt, becoming S in the afternoon. Seas 1 foot or less. Wave Detail: N 1 foot at 3 seconds and SW 1 foot at 5 seconds. .SAT NIGHT...S winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: NE 1 foot at 3 seconds and S 1 foot at 5 seconds. .SUN AND SUN NIGHT...SE winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: S 1 foot at 4 seconds and SE 1 foot at 9 seconds. .MON...SE winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 3 seconds and SW 1 foot at 4 seconds. A chance of rain. .MON NIGHT AND TUE...S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Rain. .TUE 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. $$ ANZ234-250000- Buzzards Bay- 705 AM EDT Fri May 24 2024 .TODAY...SW winds around 5 kt, increasing to 10 to 15 kt this afternoon. Seas 1 foot or less. Wave Detail: W 1 foot at 4 seconds and E 1 foot at 7 seconds. Patchy fog this morning with vsby 1 NM or less. .TONIGHT...SW winds 10 to 15 kt, becoming N 5 to 10 kt after midnight. Seas 1 foot or less. Wave Detail: SW 1 foot at 4 seconds and E 1 foot at 7 seconds. .SAT...NE winds around 5 kt, becoming S in the afternoon. Seas 1 foot or less. Wave Detail: N 1 foot at 3 seconds and SW 1 foot at 5 seconds. .SAT NIGHT...S winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: NE 1 foot at 4 seconds and S 1 foot at 5 seconds. .SUN AND SUN NIGHT...SE winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: NE 1 foot at 4 seconds and S 1 foot at 4 seconds. .MON...SE winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: SE 1 foot at 3 seconds and SW 1 foot at 4 seconds. A chance of rain. .MON NIGHT AND TUE...S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Rain. .TUE NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ235-250000- Rhode Island Sound- 705 AM EDT Fri May 24 2024 .TODAY...SW winds 5 to 10 kt, increasing to 10 to 15 kt this afternoon. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and SE 1 foot at 7 seconds. Patchy fog. Vsby 1 NM or less, increasing to 1 to 3 NM this afternoon. .TONIGHT...SW winds 10 to 15 kt, becoming NW 5 to 10 kt after midnight. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and E 1 foot at 7 seconds. .SAT...NE winds around 5 kt, becoming S in the afternoon. Seas around 2 ft. Wave Detail: S 2 ft at 6 seconds and NW 1 foot at 3 seconds. .SAT NIGHT...S winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: S 1 foot at 6 seconds and SE 1 foot at 9 seconds. .SUN AND SUN NIGHT...SE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and SE 1 foot at 9 seconds. .MON...SE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 4 seconds and SE 1 foot at 9 seconds. A chance of rain. .MON NIGHT AND TUE...S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Rain. .TUE NIGHT...SW winds 10 to 15 kt with gusts up to 20 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. $$ ANZ237-250000- Block Island Sound- 705 AM EDT Fri May 24 2024 .TODAY...SW winds around 5 kt, increasing to 5 to 10 kt this afternoon. Seas around 2 ft. Wave Detail: S 2 ft at 5 seconds and SW 1 foot at 2 seconds. Patchy fog. Vsby 1 NM or less. .TONIGHT...SW winds around 10 kt, becoming NW after midnight. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and E 1 foot at 7 seconds. .SAT...E winds around 5 kt, becoming S in the afternoon. Seas 1 foot or less, then around 2 ft in the afternoon. Wave Detail: NW 1 foot at 2 seconds and SE 1 foot at 6 seconds, becoming S 2 ft at 6 seconds and SE 1 foot at 9 seconds. .SAT NIGHT...S winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: S 1 foot at 5 seconds and SE 1 foot at 9 seconds. .SUN AND SUN NIGHT...SE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: S 1 foot at 5 seconds and SE 1 foot at 9 seconds. .MON...SE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SE 2 ft at 4 seconds and SE 1 foot at 9 seconds. A chance of rain. .MON NIGHT AND TUE...SE winds 10 to 15 kt, becoming SW. Gusts up to 20 kt. Seas 2 to 4 ft. Rain. Vsby 1 to 3 NM. .TUE NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ230-250000- Boston Harbor- 705 AM EDT Fri May 24 2024 .TODAY...W winds 5 to 10 kt, becoming SW 10 to 15 kt with gusts up to 20 kt this afternoon. Waves 1 foot or less. .TONIGHT...W winds 10 to 15 kt with gusts up to 20 kt, becoming NW 5 to 10 kt after midnight. Waves 1 foot or less. .SAT...N winds around 5 kt, becoming SE in the afternoon. Waves 1 foot or less. .SAT NIGHT...S winds 5 to 10 kt. Waves 1 foot or less. .SUN...SE winds 5 to 10 kt. Waves 1 foot or less. A chance of showers in the afternoon. .SUN NIGHT...SE winds 5 to 10 kt. Waves 1 foot or less. .MON...SE winds 10 to 15 kt with gusts up to 20 kt. Waves 2 to 3 ft. A chance of rain. .MON NIGHT AND TUE...SE winds 10 to 15 kt with gusts up to 20 kt, becoming S. Waves 2 to 3 ft. Rain. .TUE NIGHT...SW winds 10 to 15 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. $$ ANZ236-250000- Narragansett Bay- 705 AM EDT Fri May 24 2024 .TODAY...SW winds around 5 kt, increasing to around 10 kt this afternoon. Waves 1 foot or less. Patchy fog this morning with vsby 1 NM or less. .TONIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Waves around 2 ft in the evening, then 1 foot or less. .SAT...NE winds around 5 kt, becoming S in the afternoon. Waves 1 foot or less. .SAT NIGHT...S winds 5 to 10 kt. Waves 1 foot or less. .SUN AND SUN NIGHT...SE winds 5 to 10 kt. Waves around 2 ft. .MON...SE winds 10 to 15 kt. Waves 2 to 3 ft. A chance of rain. .MON NIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Waves 2 to 4 ft. Rain. .TUE...SW winds 10 to 15 kt. Waves 2 to 4 ft. Rain likely. .TUE NIGHT...SW winds 10 to 15 kt. Waves 2 to 4 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ 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