FZUS51 KBOX 201106 CWFBOX Coastal Waters Forecast for Massachusetts and Rhode Island National Weather Service Boston/Norton MA 705 AM EDT Mon Apr 20 2026 Coastal waters from the Merrimack River MA to Watch Hill RI out to 25 NM ANZ200-210000- 705 AM EDT Mon Apr 20 2026 .Synopsis for Massachusetts and Rhode Island coastal waters... High pres builds over the waters early this week supporting relatively calm conditions with seas less than 4 feet and winds generally 10 knots or less sustained. Weak low pres may pass over the waters Wed into Thu. $$ ANZ250-210000- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 705 AM EDT Mon Apr 20 2026 .TODAY...W winds 10 to 15 kt, diminishing to 5 to 10 kt this afternoon. Seas 2 to 4 ft. Wave Detail: W 2 ft at 4 seconds and SE 2 ft at 7 seconds. .TONIGHT...N winds 10 to 15 kt, increasing to 15 to 20 kt after midnight. Seas 2 to 4 ft. Wave Detail: N 3 ft at 4 seconds and NW 2 ft at 4 seconds. .TUE...N winds 10 to 15 kt, becoming NE 5 to 10 kt in the afternoon. Seas 2 to 4 ft. Wave Detail: N 3 ft at 5 seconds and E 2 ft at 8 seconds. .TUE NIGHT...S winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: NE 2 ft at 4 seconds and SE 2 ft at 7 seconds. .WED AND WED NIGHT...S winds 10 to 15 kt. Seas 2 to 4 ft. Wave Detail: SW 2 ft at 3 seconds and E 2 ft at 9 seconds. .THU THROUGH FRI NIGHT...NE winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: NW 2 ft at 4 seconds and NE 2 ft at 5 seconds. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ251-210000- Massachusetts Bay and Ipswich Bay- 705 AM EDT Mon Apr 20 2026 .TODAY...W winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: W 2 ft at 4 seconds and E 2 ft at 7 seconds. .TONIGHT...N winds 10 to 15 kt. Gusts up to 20 kt after midnight. Seas 2 to 3 ft. Wave Detail: N 3 ft at 4 seconds and E 2 ft at 8 seconds. .TUE...N winds 10 to 15 kt, becoming E 5 to 10 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: NE 3 ft at 5 seconds and NW 2 ft at 3 seconds. .TUE NIGHT...S winds 10 to 15 kt. Seas around 2 ft. Wave Detail: S 2 ft at 3 seconds and NE 2 ft at 5 seconds. .WED...S winds 10 to 15 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 3 seconds and NE 1 foot at 4 seconds. .WED NIGHT...S winds 5 to 10 kt, becoming W after midnight. Seas 2 to 3 ft. Wave Detail: S 2 ft at 3 seconds and E 2 ft at 9 seconds. .THU THROUGH FRI NIGHT...NE 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. $$ ANZ231-210000- Cape Cod Bay- 705 AM EDT Mon Apr 20 2026 .TODAY...W winds 5 to 10 kt, becoming NW this afternoon. Seas around 2 ft. Wave Detail: NW 2 ft at 4 seconds and N 2 ft at 5 seconds. A slight chance of rain this afternoon. .TONIGHT...N winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt after midnight. Seas around 2 ft. Wave Detail: N 2 ft at 4 seconds and SE 1 foot at 7 seconds. .TUE...N winds 10 to 15 kt, becoming NE 5 to 10 kt in the afternoon. Seas around 2 ft. Wave Detail: N 2 ft at 3 seconds and N 2 ft at 4 seconds. .TUE NIGHT...SE winds 5 to 10 kt, becoming S after midnight. Seas around 2 ft. Wave Detail: N 2 ft at 5 seconds and S 1 foot at 5 seconds. .WED...S winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas around 2 ft. Wave Detail: S 1 foot at 2 seconds and N 1 foot at 4 seconds. .WED NIGHT...SE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW 1 foot at 3 seconds and NE 1 foot at 4 seconds. .THU THROUGH FRI NIGHT...NE winds 5 to 10 kt. Seas around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ254-210000- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 NM- 705 AM EDT Mon Apr 20 2026 .TODAY...W winds 10 to 15 kt, diminishing to 5 to 10 kt this afternoon. Seas 2 to 4 ft. Wave Detail: NW 3 ft at 5 seconds and N 2 ft at 5 seconds. A slight chance of rain this afternoon. .TONIGHT...W winds 5 to 10 kt, becoming N 15 to 20 kt after midnight. Seas 2 to 3 ft. Wave Detail: N 3 ft at 5 seconds and S 2 ft at 7 seconds. .TUE...NE winds 10 to 15 kt with gusts up to 20 kt, becoming N 5 to 10 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: N 3 ft at 5 seconds and E 2 ft at 8 seconds. .TUE NIGHT...SE winds around 5 kt, becoming SW after midnight. Seas 2 to 3 ft. Wave Detail: N 2 ft at 5 seconds and E 2 ft at 8 seconds. .WED...S winds 10 to 15 kt. Seas 2 to 4 ft. Wave Detail: SW 2 ft at 4 seconds and E 2 ft at 7 seconds. .WED NIGHT...SE winds around 10 kt, becoming E after midnight. Seas 3 to 4 ft. Wave Detail: E 3 ft at 9 seconds and S 2 ft at 4 seconds. .THU THROUGH FRI NIGHT...N winds 5 to 10 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. $$ ANZ255-210000- Coastal Waters extending out to 25 NM South of Marthas Vineyard and Nantucket- 705 AM EDT Mon Apr 20 2026 .TODAY...W winds 10 to 15 kt. Seas 2 to 4 ft. Wave Detail: W 3 ft at 5 seconds and SE 2 ft at 7 seconds. .TONIGHT...W winds around 10 kt, becoming N 15 to 20 kt after midnight. Seas 2 to 3 ft. Wave Detail: W 2 ft at 4 seconds and S 2 ft at 7 seconds. .TUE...N winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: NW 3 ft at 4 seconds and S 1 foot at 6 seconds. .TUE NIGHT...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: NE 1 foot at 4 seconds and W 1 foot at 4 seconds. .WED...S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Wave Detail: SW 3 ft at 5 seconds and E 2 ft at 7 seconds. A chance of showers in the morning. .WED NIGHT...SE winds 10 to 15 kt, becoming E 5 to 10 kt after midnight. Seas 3 to 4 ft. Wave Detail: SW 3 ft at 6 seconds and E 2 ft at 9 seconds. .THU THROUGH FRI...N winds 5 to 10 kt. Seas 2 to 4 ft. .FRI NIGHT...NE winds 5 to 10 kt. Seas around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ256-210000- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 NM South of Block Island- 705 AM EDT Mon Apr 20 2026 .TODAY...W winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: NW 3 ft at 4 seconds and SE 2 ft at 7 seconds. .TONIGHT...NW winds 10 to 15 kt, becoming N with gusts up to 20 kt after midnight. Seas 2 to 4 ft. Wave Detail: N 3 ft at 5 seconds and S 2 ft at 7 seconds. .TUE...N winds 10 to 15 kt with gusts up to 20 kt, becoming NW 5 to 10 kt in the afternoon. Seas 2 to 4 ft. Wave Detail: N 3 ft at 4 seconds and S 1 foot at 6 seconds. .TUE NIGHT...SW winds 5 to 10 kt, becoming S 10 to 15 kt after midnight. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and E 1 foot at 4 seconds. .WED...S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Wave Detail: SW 3 ft at 5 seconds and E 1 foot at 4 seconds. A chance of showers in the morning. .WED NIGHT...SE winds 5 to 10 kt, becoming E after midnight. Seas 3 to 4 ft. Wave Detail: SW 3 ft at 5 seconds and E 2 ft at 9 seconds. .THU THROUGH FRI...NW winds 10 to 15 kt. Seas 2 to 4 ft. .FRI NIGHT...E winds 5 to 10 kt. Seas around 2ft. 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. $$ ANZ232-210000- Nantucket Sound- 705 AM EDT Mon Apr 20 2026 .TODAY...W winds 10 to 15 kt. Seas around 2 ft. Wave Detail: W 2 ft at 3 seconds and S 1 foot at 6 seconds. A slight chance of rain this afternoon. .TONIGHT...NW winds 5 to 10 kt, becoming N 10 to 15 kt with gusts up to 20 kt after midnight. Seas around 2 ft. Wave Detail: NW 2 ft at 4 seconds and NE 2 ft at 7 seconds. .TUE...N winds 10 to 15 kt with gusts up to 20 kt, becoming NE 5 to 10 kt in the afternoon. Seas around 2 ft. Wave Detail: N 2 ft at 4 seconds and S 1 foot at 6 seconds. .TUE NIGHT...SE winds 5 to 10 kt, becoming SW after midnight. Seas around 2 ft. Wave Detail: NW 1 foot at 4 seconds and E 1 foot at 4 seconds. .WED...S winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and NE 1 foot at 4 seconds. .WED NIGHT...SE winds 5 to 10 kt, becoming E after midnight. Seas around 2 ft. Wave Detail: SE 2 ft at 4 seconds and W 1 foot at 4 seconds. .THU THROUGH FRI NIGHT...NE winds 5 to 10 kt. Seas around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ233-210000- Vineyard Sound- 705 AM EDT Mon Apr 20 2026 .TODAY...W winds 10 to 15 kt. Seas around 2 ft. Wave Detail: W 2 ft at 5 seconds and N 2 ft at 5 seconds. A slight chance of rain this afternoon. .TONIGHT...NW winds 10 to 15 kt, becoming N with gusts up to 20 kt after midnight. Seas around 2 ft. Wave Detail: W 2 ft at 4 seconds and N 2 ft at 4 seconds. .TUE...N winds 10 to 15 kt, becoming NE 5 to 10 kt in the afternoon. Seas around 2 ft in the morning, then 1 foot or less. Wave Detail: NE 1 foot at 3 seconds and NW 1 foot at 4 seconds. .TUE NIGHT...S winds 5 to 10 kt. Seas 1 foot or less, then around 2 ft after midnight. Wave Detail: SW 1 foot at 3 seconds and E 1 foot at 3 seconds, becoming SW 2 ft at 4 seconds and NE 1 foot at 3 seconds. .WED...S winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Seas around 2 ft. Wave Detail: E 2 ft at 4 seconds and SW 2 ft at 5 seconds. .WED NIGHT...SE winds 5 to 10 kt, becoming E after midnight. Seas around 2 ft. Wave Detail: S 2 ft at 7 seconds and SE 1 foot at 4 seconds. .THU THROUGH FRI NIGHT...NE 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. $$ ANZ234-210000- Buzzards Bay- 705 AM EDT Mon Apr 20 2026 .TODAY...W winds 5 to 10 kt, becoming SW 10 to 15 kt this afternoon. Seas around 2 ft this morning, then 1 foot or less. Wave Detail: W 2 ft at 5 seconds and N 2 ft at 5 seconds, becoming SW 1 foot at 5 seconds and N 1 foot at 5 seconds. A slight chance of rain this afternoon. .TONIGHT...NW winds 5 to 10 kt, becoming N 10 to 15 kt with gusts up to 20 kt after midnight. Seas 1 foot or less, then around 2 ft after midnight. Wave Detail: SW 1 foot at 5 seconds and N 1 foot at 5 seconds, becoming N 2 ft at 3 seconds and SW 1 foot at 5 seconds. .TUE...N winds 10 to 15 kt, becoming SE 5 to 10 kt in the afternoon. Seas around 2 ft in the morning, then 1 foot or less. Wave Detail: NE 1 foot at 3 seconds and NW 1 foot at 4 seconds, becoming NE 1 foot at 2 seconds and NW 1 foot at 4 seconds. .TUE NIGHT...S winds 5 to 10 kt. Seas 1 foot or less, then around 2 ft after midnight. Wave Detail: SW 1 foot at 3 seconds and NE 1 foot at 3 seconds, becoming SW 1 foot at 3 seconds and E 1 foot at 4 seconds. .WED...S winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and E 1 foot at 4 seconds. .WED NIGHT...SE winds 5 to 10 kt, becoming E after midnight. Seas around 2 ft. Wave Detail: SE 2 ft at 7 seconds and E 1 foot at 4 seconds. .THU THROUGH FRI NIGHT...NE winds 5 to 10 kt. Seas around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ235-210000- Rhode Island Sound- 705 AM EDT Mon Apr 20 2026 .TODAY...W winds 10 to 15 kt. Seas around 2 ft. Wave Detail: W 2 ft at 4 seconds and N 2 ft at 5 seconds. A slight chance of rain this afternoon. .TONIGHT...NW winds 10 to 15 kt, becoming N with gusts up to 20 kt after midnight. Seas 2 to 3 ft. Wave Detail: N 2 ft at 3 seconds and W 2 ft at 3 seconds. .TUE...N winds 10 to 15 kt with gusts up to 20 kt, becoming SW 5 to 10 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: N 2 ft at 3 seconds and NW 1 foot at 3 seconds. .TUE NIGHT...SW winds 10 to 15 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 3 seconds and E 1 foot at 3 seconds. .WED...S winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: S 3 ft at 4 seconds and SE 1 foot at 8 seconds. A chance of showers in the morning. .WED NIGHT...SE winds 5 to 10 kt, becoming E after midnight. Seas 2 to 3 ft. Wave Detail: S 3 ft at 7 seconds and SE 2 ft at 4 seconds. .THU THROUGH FRI NIGHT...E 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. $$ ANZ237-210000- Block Island Sound- 705 AM EDT Mon Apr 20 2026 .TODAY...W winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 7 seconds and W 1 foot at 3 seconds. A slight chance of rain this afternoon. .TONIGHT...NW winds 10 to 15 kt, becoming N with gusts up to 20 kt after midnight. Seas around 2 ft. Wave Detail: NW 2 ft at 3 seconds and SE 2 ft at 7 seconds. .TUE...N winds 10 to 15 kt with gusts up to 20 kt, becoming S 5 to 10 kt in the afternoon. Seas around 2 ft. Wave Detail: NE 2 ft at 3 seconds and W 1 foot at 3 seconds. .TUE NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SW 1 foot at 2 seconds and E 1 foot at 3 seconds. .WED...S winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 4 seconds and SE 1 foot at 2 seconds. .WED NIGHT...E winds 5 to 10 kt, becoming NE after midnight. Seas 2 to 3 ft. Wave Detail: S 3 ft at 7 seconds and SW 1 foot at 3 seconds. .THU THROUGH FRI NIGHT...E winds 5 to 10 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ230-210000- Boston Harbor- 705 AM EDT Mon Apr 20 2026 .TODAY...W winds around 10 kt. Waves 1 foot or less. .TONIGHT...NW winds 5 to 10 kt, becoming N 10 to 15 kt after midnight. Waves 1 foot or less, then around 2 ft after midnight. .TUE...N winds 5 to 10 kt, becoming E in the afternoon. Waves 1 foot or less. .TUE NIGHT...S winds 10 to 15 kt. Waves 1 foot or less. .WED...S winds around 10 kt. Waves 1 foot or less, then around 2 ft in the afternoon. .WED NIGHT...S winds 5 to 10 kt, becoming W after midnight. Waves 1 foot or less. .THU THROUGH FRI NIGHT...NE 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. $$ ANZ236-210000- Narragansett Bay- 705 AM EDT Mon Apr 20 2026 .TODAY...W winds 5 to 10 kt. Waves around 2 ft. A slight chance of rain this afternoon. .TONIGHT...N winds 5 to 10 kt. Waves around 2 ft. .TUE...N winds 5 to 10 kt, becoming S in the afternoon. Waves around 2 ft in the morning, then 1 foot or less. .TUE NIGHT...S winds 5 to 10 kt. Waves 1 foot or less, then around 2 ft after midnight. .WED...S winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Waves around 2 ft. .WED NIGHT...SE winds 5 to 10 kt, becoming NE after midnight. Waves around 2 ft. .THU THROUGH FRI NIGHT...E winds 5 to 10 kt. Waves around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ280-210000- Ocean Waters from the Merrimack River to Plymouth from 40 to 60 NM- 705 AM EDT Mon Apr 20 2026 .TODAY...W winds 10 to 15 kt, diminishing to 5 to 10 kt this afternoon. Seas 2 to 4 ft. Wave Detail: W 3 ft at 5 seconds and N 3 ft at 6 seconds. .TONIGHT...NW winds 5 to 10 kt, becoming N 10 to 15 kt with gusts up to 20 kt after midnight. Seas 2 to 4 ft. Wave Detail: N 3 ft at 5 seconds and E 2 ft at 8 seconds. .TUE...NE winds 10 to 15 kt, diminishing to 5 to 10 kt in the afternoon. Seas 2 to 4 ft. Wave Detail: N 3 ft at 5 seconds and E 2 ft at 8 seconds. .TUE NIGHT...SE winds 5 to 10 kt, becoming SW after midnight. Seas 2 to 3 ft. Wave Detail: S 2 ft at 6 seconds and E 2 ft at 8 seconds. .WED AND WED NIGHT...S winds 10 to 15 kt. Seas 2 to 4 ft. Wave Detail: SW 2 ft at 3 seconds and E 2 ft at 9 seconds. .THU THROUGH FRI...N winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: N 2 ft at 4 seconds and S 2 ft at 5 seconds. .FRI NIGHT...N winds 5 to 10 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. $$ ANZ281-210000- Ocean Waters from Provincetown to Nantucket from 20 to 60 NM- 705 AM EDT Mon Apr 20 2026 .TODAY...W winds 10 to 15 kt, diminishing to 5 to 10 kt this afternoon. Seas 3 to 5 ft. Wave Detail: N 4 ft at 7 seconds and S 2 ft at 7 seconds. .TONIGHT...SW winds around 5 kt, becoming N 10 to 15 kt with gusts up to 20 kt after midnight. Seas 2 to 3 ft. Wave Detail: N 3 ft at 5 seconds and S 2 ft at 7 seconds. .TUE...NE winds 10 to 15 kt, becoming N 5 to 10 kt in the afternoon. Seas around 3 ft. Wave Detail: N 3 ft at 5 seconds and E 2 ft at 8 seconds. .TUE NIGHT...NE winds around 5 kt, becoming SW after midnight. Seas 2 to 3 ft. Wave Detail: N 2 ft at 5 seconds and E 2 ft at 8 seconds. .WED...S winds 5 to 10 kt, increasing to 10 to 15 kt in the afternoon. Seas 3 to 5 ft. Wave Detail: S 2 ft at 4 seconds and E 2 ft at 7 seconds. .WED NIGHT...SE winds around 10 kt, becoming E after midnight. Seas 4 to 5 ft. Wave Detail: S 3 ft at 5 seconds and E 3 ft at 9 seconds. .THU THROUGH FRI...N winds 10 to 15 kt. Seas 2 to 4 ft. .FRI NIGHT...N winds 5 to 10 kt. Seas 4 to 6 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ282-210000- Ocean Waters from Marthas Vineyard to Nantucket from 25 to 60 NM- 705 AM EDT Mon Apr 20 2026 .TODAY...NW winds 10 to 15 kt, becoming W 5 to 10 kt this afternoon. Seas 3 to 5 ft. Wave Detail: NW 4 ft at 6 seconds and NE 2 ft at 6 seconds. .TONIGHT...W winds 5 to 10 kt, becoming N 15 to 20 kt after midnight. Seas 2 to 3 ft. Wave Detail: NW 2 ft at 4 seconds and NE 2 ft at 7 seconds. A chance of rain in the evening. .TUE...N winds 10 to 15 kt. Gusts up to 20 kt in the morning. Seas 2 to 4 ft. Wave Detail: N 3 ft at 5 seconds and E 2 ft at 8 seconds. .TUE NIGHT...N winds around 5 kt, becoming SW after midnight. Seas 2 to 3 ft. Wave Detail: NE 2 ft at 5 seconds and E 2 ft at 8 seconds. .WED...S winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Seas 3 to 5 ft. Wave Detail: SW 3 ft at 5 seconds and N 2 ft at 5 seconds. A chance of showers. .WED NIGHT...SE winds 10 to 15 kt, becoming E after midnight. Seas 4 to 5 ft. Wave Detail: SW 4 ft at 6 seconds and E 3 ft at 9 seconds. A chance of showers in the evening. .THU AND THU NIGHT...N winds 5 to 10 kt, becoming NW. Seas 3 to 5 ft. .FRI...N winds 10 to 15 kt. Seas 2 to 3 ft. .FRI NIGHT...NE winds 5 to 10 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. $$ ANZ283-210000- Ocean Waters from Montauk NY to Marthas Vineyard from 25 to 60 NM- 705 AM EDT Mon Apr 20 2026 .TODAY...NW winds 10 to 15 kt, becoming W 5 to 10 kt this afternoon. Seas 2 to 4 ft. Wave Detail: W 3 ft at 5 seconds and NE 2 ft at 6 seconds. A slight chance of rain this afternoon. .TONIGHT...NW winds 10 to 15 kt, becoming N 15 to 20 kt after midnight. Seas 2 to 4 ft. Wave Detail: NW 3 ft at 4 seconds and NE 3 ft at 7 seconds. .TUE...N winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt in the afternoon. Seas 2 to 4 ft. Wave Detail: N 3 ft at 5 seconds and E 2 ft at 8 seconds. .TUE NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: N 2 ft at 4 seconds and SW 2 ft at 5 seconds. .WED...S winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. Wave Detail: W 4 ft at 5 seconds and E 2 ft at 8 seconds. A chance of showers. .WED NIGHT...SE winds 10 to 15 kt, becoming E after midnight. Seas 4 to 5 ft. Wave Detail: W 4 ft at 5 seconds and E 3 ft at 10 seconds. .THU AND THU NIGHT...N winds 5 to 10 kt, becoming W. Seas 3 to 5 ft. .FRI AND FRI NIGHT...N winds 10 to 15 kt, becoming E. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ For the latest updates...please visit our webpage at www.weather.gov/boston You can follow us on Facebook at www.facebook.com/us.nationalweatherservice.boston.gov You can follow us on Twitter at @NWSBoston