####018017215#### FZUS51 KBOX 161104 CWFBOX Coastal Waters Forecast for Massachusetts and Rhode Island National Weather Service Boston/Norton MA 704 AM EDT Fri May 16 2025 Coastal waters from the Merrimack River MA to Watch Hill RI out to 25 NM ANZ200-170000- 704 AM EDT Fri May 16 2025 .Synopsis for Massachusetts and Rhode Island coastal waters... Sporadic showers and possibly some embedded thunder continue into the mid-afternoon hours before dissipating after sunset. Areas of dense fog developing over night with east/southeast winds. High pressure supports dry/quiet weather over the coastal waters tomorrow afternoon. $$ ANZ250-170000- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 704 AM EDT Fri May 16 2025 .TODAY...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 8 seconds. Areas of dense fog this morning, then patchy fog this afternoon. Vsby 1 NM or less this morning. .TONIGHT...S winds around 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 8 seconds. Patchy fog. Vsby 1 NM or less. .SAT...SE winds 10 to 15 kt. Seas 2 to 4 ft. Wave Detail: SE 3 ft at 8 seconds and S 2 ft at 3 seconds. Patchy fog in the morning. A chance of showers in the afternoon. Vsby 1 NM or less in the morning. .SAT NIGHT...S winds 10 to 15 kt with gusts up to 20 kt, becoming SW after midnight. Seas 2 to 4 ft. Wave Detail: SE 3 ft at 7 seconds and S 2 ft at 4 seconds. A chance of showers. .SUN AND SUN NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Wave Detail: W 3 ft at 4 seconds and SE 3 ft at 7 seconds. .MON THROUGH TUE NIGHT...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: N 3 ft at 5 seconds and SE 2 ft at 8 seconds. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ251-170000- Massachusetts Bay and Ipswich Bay- 704 AM EDT Fri May 16 2025 .TODAY...SE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 7 seconds. Patchy fog. Vsby 1 NM or less this morning. .TONIGHT...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 8 seconds and SE 1 foot at 3 seconds. Patchy fog. Vsby 1 NM or less. .SAT...SE winds 5 to 10 kt, increasing to 10 to 15 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: SE 2 ft at 4 seconds and SE 2 ft at 8 seconds. Patchy fog in the morning. A chance of showers in the afternoon. Vsby 1 NM or less in the morning. .SAT NIGHT...S winds 5 to 10 kt, becoming W after midnight. Seas 2 to 3 ft. Wave Detail: SE 2 ft at 4 seconds and SE 2 ft at 7 seconds. Showers likely in the evening. .SUN AND SUN NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: W 2 ft at 3 seconds and SE 2 ft at 7 seconds. .MON THROUGH TUE NIGHT...NE winds 15 to 20 kt. Seas 2 to 3 ft. Wave Detail: N 2 ft at 5 seconds and SE 1 foot at 8 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. $$ ANZ231-170000- Cape Cod Bay- 704 AM EDT Fri May 16 2025 .TODAY...S winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: SE 1 foot at 3 seconds and SE 1 foot at 7 seconds. Areas of dense fog this morning, then patchy fog this afternoon. Vsby 1 NM or less this morning. .TONIGHT...S winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: SE 1 foot at 3 seconds and SE 1 foot at 8 seconds. Patchy fog. Vsby 1 NM or less. .SAT...S winds 5 to 10 kt. Seas 1 foot or less, then around 2 ft in the afternoon. Wave Detail: SE 1 foot at 2 seconds and SE 1 foot at 8 seconds, becoming SE 2 ft at 7 seconds and S 1 foot at 3 seconds. Patchy fog in the morning. A chance of showers in the afternoon. Vsby 1 NM or less in the morning. .SAT NIGHT...S winds 5 to 10 kt, becoming SW after midnight. Seas around 2 ft. Wave Detail: SE 2 ft at 7 seconds and S 1 foot at 3 seconds. A chance of showers in the evening. .SUN AND SUN NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: W 2 ft at 3 seconds and SE 2 ft at 7 seconds. .MON THROUGH TUE NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: N 2 ft at 5 seconds and S 1 foot at 8 seconds. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ254-170000- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm- 704 AM EDT Fri May 16 2025 .TODAY...S winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: SE 4 ft at 8 seconds. Areas of dense fog this morning, then patchy fog this afternoon. Vsby 1 NM or less this morning. .TONIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 8 seconds. Patchy fog. Vsby 1 NM or less. .SAT...S winds 5 to 10 kt. Seas 2 to 4 ft. Wave Detail: SE 3 ft at 7 seconds and SE 1 foot at 2 seconds. Patchy fog in the morning. A chance of showers in the afternoon. Vsby 1 NM or less in the morning. .SAT NIGHT...S winds around 10 kt, becoming SW after midnight. Seas 3 to 4 ft. Wave Detail: S 3 ft at 7 seconds and SE 1 foot at 3 seconds. A chance of showers in the evening. .SUN AND SUN NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. Wave Detail: S 4 ft at 7 seconds and W 2 ft at 4 seconds. .MON THROUGH TUE NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. Wave Detail: NW 3 ft at 4 seconds and S 3 ft at 8 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. $$ ANZ255-170000- Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket- 704 AM EDT Fri May 16 2025 .TODAY...SW winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: S 4 ft at 8 seconds. Areas of dense fog this morning, then patchy fog this afternoon. Vsby 1 NM or less this morning. .TONIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 7 seconds. Patchy fog. Vsby 1 NM or less. .SAT...S winds 10 to 15 kt. Seas 2 to 4 ft. Wave Detail: SE 3 ft at 7 seconds. Patchy fog in the morning. A chance of showers in the afternoon. Vsby 1 NM or less in the morning. .SAT NIGHT...SW winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: S 4 ft at 7 seconds. A chance of showers in the evening. .SUN AND SUN NIGHT...W winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail: SW 5 ft at 7 seconds and W 1 foot at 3 seconds. .MON...W winds 15 to 20 kt. Seas 3 to 5 ft. Wave Detail: W 5 ft at 7 seconds. .MON NIGHT THROUGH TUE NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ256-170000- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island- 704 AM EDT Fri May 16 2025 .TODAY...SW winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: SE 4 ft at 7 seconds. Areas of dense fog this morning, then patchy fog this afternoon. Vsby 1 NM or less this morning. .TONIGHT...S winds 5 to 10 kt. Seas around 3 ft. Wave Detail: SE 3 ft at 7 seconds. Patchy fog. Vsby 1 NM or less. .SAT...S winds 5 to 10 kt, increasing to 10 to 15 kt in the afternoon. Seas 3 to 4 ft. Wave Detail: SE 3 ft at 7 seconds. Patchy fog in the morning. A chance of showers in the afternoon. Vsby 1 NM or less in the morning. .SAT NIGHT...SW winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: S 4 ft at 7 seconds. A chance of showers in the evening. .SUN AND SUN NIGHT...W winds 15 to 20 kt. Seas 3 to 5 ft. Wave Detail: S 5 ft at 7 seconds and NW 2 ft at 4 seconds. .MON...W winds 15 to 20 kt. Seas 3 to 5 ft. Wave Detail: SW 4 ft at 7 seconds and NW 3 ft at 4 seconds. .MON NIGHT THROUGH TUE NIGHT...NE 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. $$ ANZ232-170000- Nantucket Sound- 704 AM EDT Fri May 16 2025 .TODAY...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 6 seconds and SW 1 foot at 2 seconds. Patchy dense fog this morning, then patchy fog this afternoon. Vsby 1 NM or less this morning. .TONIGHT...S winds 5 to 10 kt. Seas around 2 ft in the evening, then 1 foot or less. Wave Detail: SW 1 foot at 2 seconds and SE 1 foot at 6 seconds. Patchy fog. Vsby 1 NM or less. .SAT...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: S 1 foot at 3 seconds and SE 1 foot at 7 seconds. Patchy fog in the morning. A chance of showers in the afternoon. Vsby 1 NM or less in the morning. .SAT NIGHT...S winds around 10 kt, becoming SW after midnight. Seas around 2 ft. Wave Detail: S 2 ft at 7 seconds and S 1 foot at 4 seconds. A chance of showers in the evening. .SUN AND SUN NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: W 2 ft at 3 seconds and SE 2 ft at 6 seconds. .MON THROUGH TUE NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: W 2 ft at 4 seconds and S 2 ft at 7 seconds. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ233-170000- Vineyard Sound- 704 AM EDT Fri May 16 2025 .TODAY...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: S 2 ft at 7 seconds. Areas of dense fog this morning, then patchy fog this afternoon. Vsby 1 NM or less this morning. .TONIGHT...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: S 2 ft at 7 seconds and SW 1 foot at 2 seconds. Patchy fog. Vsby 1 NM or less. .SAT...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: S 2 ft at 7 seconds and S 1 foot at 2 seconds. Patchy fog in the morning. A chance of showers in the afternoon. Vsby 1 NM or less in the morning. .SAT NIGHT...SW winds around 10 kt. Seas around 2 ft. Wave Detail: S 2 ft at 7 seconds and S 1 foot at 3 seconds. A chance of showers in the evening. .SUN AND SUN NIGHT...W winds 15 to 20 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 7 seconds and SW 2 ft at 4 seconds. .MON THROUGH TUE NIGHT...NE winds 15 to 20 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 7 seconds and NW 2 ft 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. $$ ANZ234-170000- Buzzards Bay- 704 AM EDT Fri May 16 2025 .TODAY...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 6 seconds and SW 1 foot at 2 seconds. Patchy fog. Vsby 1 NM or less this morning. .TONIGHT...S winds 5 to 10 kt. Seas around 2 ft in the evening, then 1 foot or less. Wave Detail: S 2 ft at 7 seconds and S 1 foot at 3 seconds, becoming S 1 foot at 3 seconds and S 1 foot at 7 seconds. Patchy fog. Vsby 1 NM or less. .SAT...S winds 5 to 10 kt. Seas 1 foot or less, then around 2 ft in the afternoon. Wave Detail: S 1 foot at 3 seconds and S 1 foot at 7 seconds, becoming S 2 ft at 7 seconds and S 1 foot at 3 seconds. Patchy fog in the morning. A chance of showers in the afternoon. Vsby 1 NM or less in the morning. .SAT NIGHT...SW winds around 10 kt. Seas around 2 ft. Wave Detail: S 2 ft at 7 seconds and S 1 foot at 4 seconds. A chance of showers in the evening. .SUN AND SUN NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 4 seconds and S 2 ft at 7 seconds. .MON THROUGH TUE NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: N 2 ft at 4 seconds and SW 2 ft at 7 seconds. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ235-170000- Rhode Island Sound- 704 AM EDT Fri May 16 2025 .TODAY...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 7 seconds. Patchy dense fog this morning, then patchy fog this afternoon. Vsby 1 NM or less this morning. .TONIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 7 seconds. Patchy fog. Vsby 1 NM or less. .SAT...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 7 seconds. Patchy fog in the morning. A chance of showers in the afternoon. Vsby 1 NM or less in the morning. .SAT NIGHT...SW winds around 10 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 7 seconds and W 1 foot at 3 seconds. A chance of showers in the evening. .SUN AND SUN NIGHT...W winds 15 to 20 kt. Seas 2 to 4 ft. Wave Detail: S 4 ft at 7 seconds and W 2 ft at 4 seconds. .MON AND MON NIGHT...NW winds 15 to 20 kt, diminishing to 10 to 15 kt. Seas 2 to 4 ft. Wave Detail: SW 4 ft at 7 seconds and N 2 ft at 4 seconds. .TUE AND TUE NIGHT...NW winds 10 to 15 kt, becoming NE. 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. $$ ANZ237-170000- Block Island Sound- 704 AM EDT Fri May 16 2025 .TODAY...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 7 seconds. Areas of dense fog this morning, then patchy fog this afternoon. Vsby 1 NM or less this morning. .TONIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 7 seconds. Patchy fog. Vsby 1 NM or less. .SAT...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 7 seconds. Patchy fog in the morning. A chance of showers in the afternoon. Vsby 1 NM or less in the morning. .SAT NIGHT...SW winds around 10 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 7 seconds and W 1 foot at 3 seconds. A chance of showers in the evening. .SUN AND SUN NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Wave Detail: S 3 ft at 7 seconds and W 2 ft at 4 seconds. .MON THROUGH TUE NIGHT...E winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 7 seconds and W 2 ft at 4 seconds. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ230-170000- Boston Harbor- 704 AM EDT Fri May 16 2025 .TODAY...SE winds 5 to 10 kt. Waves 1 foot or less. Patchy fog. Vsby 1 to 3 NM this morning. .TONIGHT...S winds 5 to 10 kt. Waves 1 foot or less. Patchy fog after midnight with vsby 1 NM or less. .SAT...SE winds 5 to 10 kt. Waves 1 foot or less, then around 2 ft in the afternoon. Patchy fog in the morning. A chance of showers in the afternoon. Vsby 1 NM or less in the morning. .SAT NIGHT...S winds 5 to 10 kt, becoming W after midnight. Waves 1 foot or less. Showers likely, mainly in the evening. .SUN AND SUN NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Waves around 2 ft. .MON THROUGH TUE NIGHT...NE winds 15 to 20 kt with gusts up to 25 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. $$ ANZ236-170000- Narragansett Bay- 704 AM EDT Fri May 16 2025 .TODAY...S winds 5 to 10 kt. Waves around 2 ft. Patchy fog this morning with vsby 1 to 3 NM. .TONIGHT...S winds 5 to 10 kt. Waves around 2 ft. Patchy fog. Vsby 1 NM or less. .SAT...S winds 5 to 10 kt. Waves 2 to 3 ft. Patchy fog in the morning. A chance of showers in the afternoon. Vsby 1 NM or less in the morning. .SAT NIGHT...SW winds 5 to 10 kt, becoming W after midnight. Waves 2 to 3 ft. A chance of showers in the evening. .SUN AND SUN NIGHT...W winds 10 to 15 kt with gusts up to 20 kt. Waves 2 to 3 ft. .MON THROUGH TUE NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Waves 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ For the latest updates...please visit our webpage at www.weather.gov/boston You can follow us on Facebook at www.facebook.com/NWSBoston You can follow us on Twitter at @NWSBoston