FZUS51 KBOX 091103 CWFBOX Coastal Waters Forecast for Massachusetts and Rhode Island National Weather Service Boston/Norton MA 703 AM EDT Fri May 9 2025 Coastal waters from the Merrimack River MA to Watch Hill RI out to 25 NM ANZ200-100000- 703 AM EDT Fri May 9 2025 .Synopsis for Massachusetts and Rhode Island coastal waters... A deep closed upper level low over the Ohio Valley will only slowly lift northeast though the middle of the week resulting in periods of showers and isolated thunderstorms. This closed low finally lifts to our north by Thu. However...a surface low pres system will likely lift NE from the southeast/mid Atlantic states into our region by Fri and Sat. $$ ANZ250-100000- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 703 AM EDT Fri May 9 2025 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH SATURDAY EVENING... .TODAY...E winds 10 to 15 kt with gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail: SE 4 ft at 9 seconds and NE 3 ft at 5 seconds. Patchy fog. A chance of showers this afternoon. Vsby 1 NM or less. .TONIGHT...E winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 5 ft. Wave Detail: NE 4 ft at 6 seconds and SE 4 ft at 9 seconds. Patchy fog. Showers. Vsby 1 NM or less. .SAT...SW winds 15 to 20 kt, becoming W in the afternoon. Seas 4 to 5 ft. Wave Detail: SE 4 ft at 9 seconds and W 3 ft at 4 seconds. Patchy fog in the morning. Showers likely in the morning with vsby 1 to 3 NM. .SAT NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. Wave Detail: SE 4 ft at 9 seconds and W 3 ft at 4 seconds. .SUN AND SUN NIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Wave Detail: NW 3 ft at 4 seconds and SE 3 ft at 9 seconds. .MON THROUGH TUE NIGHT...SW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: SW 3 ft at 4 seconds and SE 2 ft at 9 seconds. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ251-100000- Massachusetts Bay and Ipswich Bay- 703 AM EDT Fri May 9 2025 .TODAY...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Wave Detail: NE 3 ft at 4 seconds and E 3 ft at 9 seconds. Patchy fog. Showers likely this afternoon. Vsby 1 NM or less. .TONIGHT...E winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 3 to 4 ft. Wave Detail: NE 4 ft at 5 seconds and SE 3 ft at 9 seconds. Patchy fog. Showers. Vsby 1 NM or less. .SAT...NW winds 10 to 15 kt, becoming W 15 to 20 kt in the afternoon. Seas 3 to 4 ft. Wave Detail: NE 3 ft at 6 seconds and SE 3 ft at 9 seconds. A chance of showers. Patchy fog in the morning with vsby 1 to 3 NM. .SAT NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Wave Detail: E 3 ft at 9 seconds and W 2 ft at 4 seconds. .SUN AND SUN NIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: NW 2 ft at 3 seconds and E 2 ft at 9 seconds. .MON THROUGH TUE 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. 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. $$ ANZ231-100000- Cape Cod Bay- 703 AM EDT Fri May 9 2025 .TODAY...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 2 ft at 9 seconds and E 1 foot at 2 seconds. Patchy fog. Showers likely this afternoon. Vsby 1 NM or less. .TONIGHT...E winds 10 to 15 kt. Gusts up to 25 kt in the evening. Seas 2 to 3 ft. Wave Detail: SE 2 ft at 4 seconds and SE 2 ft at 9 seconds. Patchy fog. Showers. Vsby 1 NM or less. .SAT...W winds 10 to 15 kt with gusts up to 25 kt. Seas around 3 ft. Wave Detail: SW 2 ft at 3 seconds and NE 2 ft at 6 seconds. Patchy fog in the morning. A chance of showers in the morning with vsby 1 to 3 NM. .SAT NIGHT...W winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas 2 to 3 ft. Wave Detail: W 2 ft at 4 seconds and SE 2 ft at 9 seconds. .SUN AND SUN NIGHT...NW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: N 2 ft at 5 seconds and SE 2 ft at 9 seconds. .MON THROUGH TUE NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 3 seconds and N 1 foot at 5 seconds. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ254-100000- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm- 703 AM EDT Fri May 9 2025 ...SMALL CRAFT ADVISORY IN EFFECT FROM NOON EDT TODAY THROUGH SATURDAY EVENING... .TODAY...E winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt this afternoon. Seas 3 to 4 ft. Wave Detail: SE 4 ft at 9 seconds. Patchy fog. A slight chance of showers this afternoon. Vsby 1 NM or less. .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 NE 3 ft at 6 seconds. Patchy fog. Showers. Vsby 1 NM or less. .SAT...SW winds 15 to 20 kt, becoming W 20 to 25 kt in the afternoon. Seas 4 to 6 ft. Wave Detail: SE 5 ft at 9 seconds and SW 4 ft at 5 seconds. Patchy fog in the morning. Showers likely 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: W 4 ft at 5 seconds and SE 4 ft at 9 seconds. .SUN...NW winds around 10 kt. Gusts up to 20 kt in the morning. Seas 3 to 5 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 4 seconds. .MON THROUGH TUE NIGHT...SW winds 10 to 15 kt with gusts up to 20 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. $$ ANZ255-100000- Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket- 703 AM EDT Fri May 9 2025 ...SMALL CRAFT ADVISORY IN EFFECT FROM NOON EDT TODAY THROUGH SATURDAY EVENING... .TODAY...E winds 10 to 15 kt. Gusts up to 20 kt this afternoon. Seas 3 to 4 ft. Wave Detail: SE 4 ft at 9 seconds and E 2 ft at 3 seconds. Patchy fog. A chance of showers this afternoon. Vsby 1 NM or less. .TONIGHT...SE winds 10 to 15 kt, becoming S after midnight. Gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail: SE 5 ft at 9 seconds and SE 2 ft at 4 seconds. Patchy fog. Showers. Vsby 1 NM or less. .SAT...W winds 20 to 25 kt with gusts up to 30 kt. Seas 5 to 7 ft. Wave Detail: SW 6 ft at 6 seconds and SE 4 ft at 9 seconds. Patchy fog in the morning. A chance of showers in the morning with vsby 1 to 3 NM. .SAT NIGHT...W winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 5 to 7 ft. Wave Detail: SW 5 ft at 7 seconds and E 3 ft at 7 seconds. .SUN...NW winds 10 to 15 kt. Seas 2 to 4 ft. Wave Detail: W 3 ft at 6 seconds and SE 3 ft at 9 seconds. .SUN NIGHT...N winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: NW 2 ft at 5 seconds and SE 2 ft at 8 seconds. .MON THROUGH TUE NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ256-100000- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island- 703 AM EDT Fri May 9 2025 ...SMALL CRAFT ADVISORY IN EFFECT FROM NOON EDT TODAY THROUGH SATURDAY EVENING... .TODAY...E winds 10 to 15 kt, increasing to 15 to 20 kt this afternoon. Gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail: SE 5 ft at 9 seconds and E 2 ft at 4 seconds. Patchy fog. A chance of showers this morning. Showers likely with isolated tstms this afternoon. Vsby 1 NM or less. .TONIGHT...SE winds 10 to 15 kt, becoming SW after midnight. Gusts up to 25 kt. Seas 4 to 5 ft. Wave Detail: SE 5 ft at 9 seconds and SE 2 ft at 5 seconds. Patchy fog. Showers in the evening. 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 5 seconds and SE 4 ft at 9 seconds. Patchy fog 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: W 5 ft at 6 seconds and SE 3 ft at 9 seconds. .SUN...W winds around 10 kt. Seas 2 to 4 ft. Wave Detail: SE 3 ft at 9 seconds and W 2 ft at 5 seconds. .SUN NIGHT...N winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 8 seconds and NW 2 ft at 4 seconds. .MON THROUGH TUE NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 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. $$ ANZ232-100000- Nantucket Sound- 703 AM EDT Fri May 9 2025 .TODAY...E winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt this afternoon. Seas 2 to 3 ft. Wave Detail: E 2 ft at 3 seconds and SE 2 ft at 9 seconds. Patchy fog. A chance of showers this afternoon. Vsby 1 NM or less. .TONIGHT...E winds 10 to 15 kt, becoming SE after midnight. Gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SE 2 ft at 4 seconds and SE 2 ft at 9 seconds. Patchy fog. Showers. Vsby 1 NM or less. .SAT...W winds 20 to 25 kt. Seas 2 to 4 ft. Wave Detail: SW 3 ft at 4 seconds and SE 2 ft at 9 seconds. Patchy fog in the morning. A chance of showers in the morning with vsby 1 to 3 NM. .SAT NIGHT...W winds 10 to 15 kt. Gusts up to 25 kt in the evening. Seas 2 to 4 ft. Wave Detail: W 3 ft at 4 seconds and NE 1 foot at 6 seconds. .SUN AND SUN NIGHT...N winds 5 to 10 kt. Seas around 2 ft. Wave Detail: W 2 ft at 3 seconds and NE 1 foot at 6 seconds. .MON THROUGH TUE NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 3 seconds and N 1 foot at 4 seconds. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ233-100000- Vineyard Sound- 703 AM EDT Fri May 9 2025 .TODAY...E winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt this afternoon. Seas around 2 ft. Wave Detail: SE 2 ft at 10 seconds and E 1 foot at 2 seconds. Patchy fog. A slight chance of showers this morning. A chance of showers with isolated tstms this afternoon. Vsby 1 NM or less. .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. Patchy fog. 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 4 ft at 5 seconds and SE 2 ft at 9 seconds. Patchy fog in the morning. A chance of showers in the morning with vsby 1 to 3 NM. .SAT NIGHT...W winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas 2 to 4 ft. Wave Detail: SW 3 ft at 6 seconds and E 2 ft at 7 seconds. .SUN AND SUN NIGHT...N winds 5 to 10 kt. Seas around 2 ft. Wave Detail: W 2 ft at 5 seconds and SE 2 ft at 9 seconds. .MON THROUGH TUE 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. 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. $$ ANZ234-100000- Buzzards Bay- 703 AM EDT Fri May 9 2025 .TODAY...E winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt this afternoon. Seas around 2 ft. Wave Detail: SE 2 ft at 9 seconds and E 1 foot at 2 seconds. Patchy fog. Showers likely this afternoon. Vsby 1 NM or less. .TONIGHT...E winds 10 to 15 kt with gusts up to 25 kt, becoming S after midnight. Seas 2 to 3 ft. Wave Detail: SE 2 ft at 4 seconds and SE 2 ft at 9 seconds. Patchy fog. Showers. Vsby 1 NM or less. .SAT...W winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: SW 3 ft at 4 seconds and SE 2 ft at 9 seconds. Patchy fog in the morning. A chance of showers in the morning with vsby 1 to 3 NM. .SAT NIGHT...W winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 6 seconds and NE 1 foot at 6 seconds. .SUN AND SUN NIGHT...N winds 5 to 10 kt. Seas around 2 ft. Wave Detail: W 2 ft at 4 seconds and SE 2 ft at 9 seconds. .MON THROUGH TUE NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 3 seconds and N 1 foot at 4 seconds. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ235-100000- Rhode Island Sound- 703 AM EDT Fri May 9 2025 .TODAY...E winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: SE 4 ft at 9 seconds and E 2 ft at 4 seconds. Patchy fog. A chance of showers this morning. Showers likely with isolated tstms this afternoon. Vsby 1 NM or less. .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: SE 4 ft at 9 seconds and SE 3 ft at 5 seconds. Patchy fog. Showers. Vsby 1 NM or less. .SAT...W winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail: SW 4 ft at 5 seconds and SE 4 ft at 9 seconds. Patchy fog in the morning with vsby 1 to 3 NM. .SAT NIGHT...W winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas 3 to 5 ft, subsiding to 2 to 3 ft after midnight. Wave Detail: W 4 ft at 6 seconds and SE 3 ft at 9 seconds, becoming W 3 ft at 6 seconds and SE 3 ft at 8 seconds. .SUN...NW winds around 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 9 seconds and W 2 ft at 4 seconds. .SUN NIGHT...N winds 5 to 10 kt. Seas around 2 ft. Wave Detail: W 2 ft at 5 seconds and SE 2 ft at 8 seconds. .MON THROUGH TUE NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 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. $$ ANZ237-100000- Block Island Sound- 703 AM EDT Fri May 9 2025 .TODAY...E winds 10 to 15 kt, increasing to 15 to 20 kt this afternoon. Gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: SE 4 ft at 9 seconds and E 2 ft at 3 seconds. Patchy fog. A chance of showers this morning. Showers with a slight chance of tstms this afternoon. Vsby 1 NM or less. .TONIGHT...E winds 15 to 20 kt with gusts up to 25 kt, becoming SW 10 to 15 kt after midnight. Seas 3 to 4 ft. Wave Detail: SE 4 ft at 9 seconds and E 2 ft at 4 seconds. Patchy fog. Showers in the evening. A chance of showers after midnight. Vsby 1 NM or less. .SAT...W winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 4 ft. Wave Detail: SE 4 ft at 9 seconds and SW 3 ft at 5 seconds. Patchy fog in the morning with vsby 1 to 3 NM. .SAT NIGHT...W winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas 2 to 4 ft. Wave Detail: W 3 ft at 5 seconds and SE 3 ft at 9 seconds. .SUN...NW winds around 10 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 8 seconds and W 1 foot at 3 seconds. .SUN NIGHT...N winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 9 seconds and W 1 foot at 4 seconds. .MON THROUGH TUE NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ230-100000- Boston Harbor- 703 AM EDT Fri May 9 2025 .TODAY...NE winds 10 to 15 kt with gusts up to 20 kt. Waves 2 to 3 ft. Patchy fog. Showers this afternoon. Vsby 1 NM or less. .TONIGHT...E winds 10 to 15 kt. Gusts up to 25 kt in the evening. Waves 2 to 3 ft. Patchy fog. Showers. Vsby 1 NM or less. .SAT...NW winds 10 to 15 kt, becoming W 15 to 20 kt in the afternoon. Waves around 2 ft. Showers likely, mainly in the morning. Patchy fog in the morning with vsby 1 to 3 NM. .SAT NIGHT...W winds 10 to 15 kt. Gusts up to 20 kt in the evening. Waves around 2 ft. .SUN AND SUN NIGHT...NW winds 10 to 15 kt with gusts up to 20 kt. Waves around 2 ft. .MON THROUGH TUE NIGHT...SW winds 10 to 15 kt with gusts up to 20 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. $$ ANZ236-100000- Narragansett Bay- 703 AM EDT Fri May 9 2025 .TODAY...E winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 25 kt this afternoon. Waves 2 to 3 ft. Patchy fog. A chance of showers this morning, then showers with isolated tstms this afternoon. Vsby 1 NM or less. .TONIGHT...E winds 10 to 15 kt with gusts up to 25 kt, becoming S 5 to 10 kt after midnight. Waves 2 to 4 ft. Patchy fog. Showers in the evening. Showers likely after midnight. Vsby 1 NM or less. .SAT...W winds 10 to 15 kt with gusts up to 20 kt. Waves 2 to 4 ft. Patchy fog in the morning with vsby 1 to 3 NM. .SAT NIGHT...W winds 10 to 15 kt. Gusts up to 20 kt in the evening. Waves 2 to 3 ft. .SUN AND SUN NIGHT...N winds 5 to 10 kt. Waves around 2 ft. .MON THROUGH TUE NIGHT...SW winds 10 to 15 kt. Waves around 2 ft. Winds and waves higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ 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