FZUS51 KBOX 092004 CWFBOX Coastal Waters Forecast for Massachusetts and Rhode Island National Weather Service Boston/Norton MA 404 PM EDT Fri May 9 2025 Coastal waters from the Merrimack River MA to Watch Hill RI out to 25 NM ANZ200-100900- 404 PM EDT Fri May 9 2025 .Synopsis for Massachusetts and Rhode Island coastal waters... A sfc low pushes into the area today, bringing a quick round of 25kt winds to the waters tonight. Low lifts out to the NE Sat morning and a high settles in for the weekend. $$ ANZ250-100900- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 404 PM EDT Fri May 9 2025 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH SATURDAY EVENING... .TONIGHT...E winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 6 ft. Wave Detail: NE 5 ft at 6 seconds and SE 4 ft at 9 seconds. Showers. Vsby 1 NM or less. .SAT...SW winds 10 to 15 kt, becoming W 15 to 20 kt in the afternoon. Seas 4 to 6 ft. Wave Detail: SE 4 ft at 9 seconds and W 3 ft at 3 seconds. A chance of showers. Vsby 1 to 3 NM in the morning. .SAT NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. Wave Detail: SE 4 ft at 9 seconds and W 3 ft at 4 seconds. .SUN...NW winds 10 to 15 kt. Gusts up to 20 kt in the morning. Seas 2 to 4 ft. Wave Detail: SE 3 ft at 9 seconds and NW 2 ft at 4 seconds. .SUN NIGHT...NW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 9 seconds and N 2 ft at 4 seconds. .MON AND MON NIGHT...SW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: SW 3 ft at 4 seconds and SE 2 ft at 8 seconds. .TUE THROUGH WED NIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ251-100900- Massachusetts Bay and Ipswich Bay- 404 PM EDT Fri May 9 2025 .TONIGHT...E winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail: E 5 ft at 6 seconds and SE 3 ft at 9 seconds. Showers. Isolated tstms after midnight. Vsby 1 NM or less. .SAT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. Wave Detail: NE 3 ft at 6 seconds and SE 3 ft at 9 seconds. A chance of showers. Vsby 1 to 3 NM in the morning. .SAT NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at 9 seconds and W 2 ft at 3 seconds. .SUN...NW winds 10 to 15 kt. Gusts up to 20 kt in the morning. Seas 2 to 3 ft. Wave Detail: NW 2 ft at 3 seconds and E 2 ft at 9 seconds. .SUN NIGHT...NW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: N 2 ft at 4 seconds and E 2 ft at 9 seconds. .MON AND MON NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 3 seconds and SE 2 ft at 9 seconds. .TUE THROUGH WED NIGHT...S winds 10 to 15 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. $$ ANZ231-100900- Cape Cod Bay- 404 PM EDT Fri May 9 2025 .TONIGHT...E winds 10 to 15 kt. Gusts up to 25 kt this evening. Seas 2 to 4 ft. Wave Detail: SE 3 ft at 9 seconds and SE 2 ft at 4 seconds. Showers. A slight chance of tstms after midnight. Vsby 1 NM or less. .SAT...SW winds 10 to 15 kt, becoming W in the afternoon. Gusts up to 25 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 3 seconds and NE 2 ft at 6 seconds. A chance of showers. Vsby 1 to 3 NM in the morning. .SAT NIGHT...W winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas 2 to 3 ft. Wave Detail: W 2 ft at 3 seconds and SE 2 ft at 9 seconds. .SUN...NW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 2 ft at 9 seconds and N 1 foot at 5 seconds. .SUN NIGHT...NW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 9 seconds and N 1 foot at 5 seconds. .MON AND MON NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 3 seconds and N 1 foot at 4 seconds. .TUE THROUGH WED...S winds 5 to 10 kt. Seas around 2 ft. .WED NIGHT...S winds 5 to 10 kt. Seas 1 foot or less. A chance of showers. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ254-100900- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm- 404 PM EDT Fri May 9 2025 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH SATURDAY EVENING... .TONIGHT...SE winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 5 ft. Wave Detail: SE 5 ft at 9 seconds and E 3 ft at 5 seconds. Showers. Vsby 1 NM or less. .SAT...SW winds 15 to 20 kt, becoming W in the afternoon. Gusts up to 25 kt. Seas 4 to 6 ft. Wave Detail: W 4 ft at 5 seconds and SE 4 ft at 9 seconds. A chance of showers in the morning with vsby 1 NM or less. .SAT NIGHT...W winds 10 to 15 kt with gusts up to 25 kt. Seas 4 to 6 ft. Wave Detail: E 4 ft at 7 seconds and W 3 ft at 5 seconds. .SUN...NW winds 5 to 10 kt. Gusts up to 20 kt in the morning. Seas 3 to 4 ft. Wave Detail: SE 3 ft at 9 seconds and N 2 ft at 5 seconds. .SUN NIGHT...NW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 9 seconds and N 2 ft at 5 seconds. .MON AND MON NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Wave Detail: SW 3 ft at 4 seconds and SE 3 ft at 8 seconds. .TUE THROUGH WED NIGHT...S 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. $$ ANZ255-100900- Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket- 404 PM EDT Fri May 9 2025 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH SATURDAY EVENING... .TONIGHT...SE winds around 15 kt, becoming S after midnight. Gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail: SE 5 ft at 9 seconds and E 3 ft at 4 seconds. Showers. A slight chance of tstms this evening. Vsby 1 NM or less. .SAT...SW winds 15 to 20 kt, becoming W 20 to 25 kt in the afternoon. Gusts up to 30 kt. Seas 4 to 6 ft. Wave Detail: SW 6 ft at 6 seconds and SE 4 ft at 9 seconds. A chance of showers in the morning with vsby 1 to 3 NM. .SAT NIGHT...W winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 4 to 6 ft. Wave Detail: SW 5 ft at 7 seconds and E 3 ft at 7 seconds. .SUN...NW winds 5 to 10 kt. Seas 2 to 4 ft. Wave Detail: W 3 ft at 6 seconds and SE 3 ft at 9 seconds. .SUN NIGHT...N winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 8 seconds and SW 2 ft at 5 seconds. .MON AND MON NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds and SE 2 ft at 8 seconds. .TUE THROUGH WED...S winds 10 to 15 kt. Seas 2 to 3 ft. .WED NIGHT...S winds 10 to 15 kt. Seas 2 to 4 ft. A chance of showers. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ256-100900- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island- 404 PM EDT Fri May 9 2025 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH SATURDAY EVENING... .TONIGHT...SE winds 15 to 20 kt, becoming SW 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 4 to 5 ft. Wave Detail: SE 5 ft at 9 seconds and E 3 ft at 5 seconds. Isolated tstms. Showers this evening, then a chance of showers after midnight. Vsby 1 NM or less. .SAT...W winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 6 ft. Wave Detail: SW 5 ft at 6 seconds and SE 5 ft at 9 seconds. .SAT NIGHT...W winds 10 to 15 kt with gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail: W 4 ft at 6 seconds and SE 3 ft at 9 seconds. .SUN...W winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 9 seconds and W 2 ft at 5 seconds. .SUN NIGHT...N winds 5 to 10 kt, becoming NE after midnight. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 9 seconds and W 2 ft at 4 seconds. .MON AND MON NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 4 seconds and SE 3 ft at 8 seconds. .TUE THROUGH WED...S winds 10 to 15 kt. Seas 2 to 3 ft. .WED NIGHT...S winds 10 to 15 kt. Seas 2 to 4 ft. A chance of showers. 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. $$ ANZ232-100900- Nantucket Sound- 404 PM EDT Fri May 9 2025 .TONIGHT...E winds around 15 kt, becoming S after midnight. Gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SE 2 ft at 5 seconds and SE 2 ft at 9 seconds. Showers. Vsby 1 NM or less. .SAT...W winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: SW 3 ft at 4 seconds and SE 2 ft at 9 seconds. A chance of showers in the morning with vsby 1 to 3 NM. .SAT NIGHT...W winds 10 to 15 kt. Gusts up to 25 kt in the evening. Seas 2 to 3 ft. Wave Detail: W 3 ft at 4 seconds and NE 1 foot at 6 seconds. .SUN...NW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: W 1 foot at 3 seconds and NE 1 foot at 5 seconds. .SUN NIGHT...N winds 5 to 10 kt. Seas around 2 ft in the evening, then 1 foot or less. Wave Detail: N 1 foot at 4 seconds and SE 1 foot at 9 seconds, becoming NW 1 foot at 4 seconds and SE 1 foot at 9 seconds. .MON AND MON NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 3 seconds and N 1 foot at 4 seconds. .TUE THROUGH WED...S winds 10 to 15 kt. Seas around 2 ft. .WED NIGHT...S winds around 10 kt. Seas around 2 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ233-100900- Vineyard Sound- 404 PM EDT Fri May 9 2025 .TONIGHT...E winds 10 to 15 kt with gusts up to 25 kt, becoming S after midnight. Seas 2 to 3 ft. Wave Detail: E 2 ft at 3 seconds and SE 2 ft at 9 seconds. Showers with isolated tstms. Vsby 1 NM or less. .SAT...W winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: SW 3 ft at 4 seconds and SE 2 ft at 9 seconds. .SAT NIGHT...W winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 6 seconds and SE 2 ft at 9 seconds. .SUN...NW winds 5 to 10 kt. Seas around 2 ft in the morning, then 1 foot or less. Wave Detail: SW 2 ft at 5 seconds and NE 1 foot at 6 seconds, becoming W 1 foot at 5 seconds and SE 1 foot at 9 seconds. .SUN NIGHT...N winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: NE 1 foot at 4 seconds and W 1 foot at 4 seconds. .MON AND MON NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 3 seconds and N 1 foot at 3 seconds. .TUE THROUGH WED...S winds 10 to 15 kt. Seas around 2 ft. .WED NIGHT...S winds around 10 kt. Seas around 2 ft. A chance of showers. 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. $$ ANZ234-100900- Buzzards Bay- 404 PM EDT Fri May 9 2025 .TONIGHT...E winds 10 to 15 kt with gusts up to 25 kt, becoming S after midnight. Seas 2 to 3 ft. Wave Detail: SE 2 ft at 4 seconds and SE 2 ft at 9 seconds. Showers with isolated tstms. Vsby 1 NM or less. .SAT...W winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: SW 3 ft at 5 seconds and SE 2 ft at 9 seconds. .SAT NIGHT...W winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt after midnight. Seas 2 to 3 ft. Wave Detail: W 3 ft at 6 seconds and SE 2 ft at 9 seconds. .SUN...NW winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: NE 1 foot at 5 seconds and W 1 foot at 5 seconds. .SUN NIGHT...N winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: N 1 foot at 4 seconds and SE 1 foot at 8 seconds. .MON AND MON NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 4 seconds and N 1 foot at 3 seconds. .TUE THROUGH WED...S winds 10 to 15 kt. Seas around 2 ft. .WED NIGHT...S winds 5 to 10 kt. Seas around 2 ft. A chance of showers. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ235-100900- Rhode Island Sound- 404 PM EDT Fri May 9 2025 .TONIGHT...E winds 15 to 20 kt with gusts up to 25 kt, becoming S 10 to 15 kt after midnight. Seas 3 to 4 ft. Wave Detail: E 4 ft at 5 seconds and SE 4 ft at 9 seconds. Isolated tstms. Showers this evening, then a chance of showers after midnight. Vsby 1 NM or less. .SAT...W winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 4 ft. Wave Detail: SW 4 ft at 5 seconds and SE 4 ft at 9 seconds. .SAT NIGHT...W winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas 2 to 4 ft. Wave Detail: W 4 ft at 6 seconds and SE 3 ft at 9 seconds. .SUN...NW winds around 10 kt. Seas around 2 ft. Wave Detail: W 2 ft at 5 seconds and SE 2 ft at 9 seconds. .SUN NIGHT...N winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 8 seconds and W 1 foot at 4 seconds. .MON AND MON NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds and SE 2 ft at 8 seconds. .TUE THROUGH WED...S winds 10 to 15 kt. Seas around 2 ft. .WED NIGHT...S winds around 10 kt. Seas 2 to 3 ft. A chance of showers. 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. $$ ANZ237-100900- Block Island Sound- 404 PM EDT Fri May 9 2025 .TONIGHT...E winds 15 to 20 kt with gusts up to 25 kt, becoming SW 10 to 15 kt after midnight. Seas 3 to 4 ft. Wave Detail: E 4 ft at 4 seconds and SE 4 ft at 9 seconds. Isolated tstms. Showers this evening, then a chance of showers after midnight. Vsby 1 NM or less. .SAT...W winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 4 ft. Wave Detail: SE 4 ft at 9 seconds and SW 3 ft at 5 seconds. .SAT NIGHT...W winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas 2 to 4 ft. Wave Detail: W 3 ft at 4 seconds and SE 3 ft at 9 seconds. .SUN...NW winds around 10 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 9 seconds and W 1 foot at 3 seconds. .SUN NIGHT...N winds 5 to 10 kt, becoming NE after midnight. Seas around 2 ft. Wave Detail: SE 2 ft at 9 seconds and W 1 foot at 4 seconds. .MON AND MON NIGHT...SW winds 10 to 15 kt. Seas around 2 ft. Wave Detail: S 2 ft at 3 seconds and SE 2 ft at 8 seconds. .TUE THROUGH WED...S winds 5 to 10 kt. Seas around 2 ft. .WED NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ230-100900- Boston Harbor- 404 PM EDT Fri May 9 2025 .TONIGHT...E winds 15 to 20 kt with gusts up to 25 kt, diminishing to 10 to 15 kt after midnight. Waves 2 to 3 ft. Showers. Isolated tstms after midnight. Vsby 1 NM or less. .SAT...NW winds 10 to 15 kt with gusts up to 20 kt. Waves around 2 ft. A chance of showers. Vsby 1 to 3 NM in the morning. .SAT NIGHT...W winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt after midnight. Waves around 2 ft. .SUN...NW winds 10 to 15 kt with gusts up to 20 kt. Waves around 2 ft. .SUN NIGHT...NW winds 5 to 10 kt. Waves around 2 ft in the evening, then 1 foot or less. .MON AND MON NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Waves around 2 ft. .TUE THROUGH WED NIGHT...S winds 5 to 10 kt. Waves 1 foot or less. 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. $$ ANZ236-100900- Narragansett Bay- 404 PM EDT Fri May 9 2025 .TONIGHT...E winds 10 to 15 kt with gusts up to 25 kt, becoming S 5 to 10 kt after midnight. Waves 2 to 4 ft. Showers with isolated tstms. Vsby 1 NM or less. .SAT...W winds 10 to 15 kt with gusts up to 20 kt. Waves 2 to 4 ft. .SAT NIGHT...W winds 5 to 10 kt. Gusts up to 20 kt in the evening. Waves 2 to 3 ft. .SUN...NW winds 5 to 10 kt. Waves around 2 ft. .SUN NIGHT...N winds 5 to 10 kt. Waves around 2 ft. .MON AND MON NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Waves around 2 ft. .TUE THROUGH WED...S winds 5 to 10 kt. Waves around 2 ft. .WED NIGHT...S winds 5 to 10 kt. Waves 2 to 3 ft. A chance of showers. Winds and waves higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ 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