Coastal Waters Forecast
Issued by NWS Boston, MA

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652 FZUS51 KBOX 171105 CWFBOX Coastal Waters Forecast for Massachusetts and Rhode Island National Weather Service Boston/Norton MA 704 AM EDT Fri May 17 2024 Coastal waters from the Merrimack River MA to Watch Hill RI out to 25 NM ANZ200-180000- 704 AM EDT Fri May 17 2024 .Synopsis for Massachusetts and Rhode Island coastal waters... Generally dry weather in store for Friday save for a few light showers across the southern waters associated with low pressure to our southeast. Shower chances increase overnight tonight and Saturday as low pressure shifts back north. High pressure builds in late this weekend with dry conditions persisting through early next week. $$ ANZ250-180000- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 704 AM EDT Fri May 17 2024 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE SATURDAY NIGHT... .TODAY...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. Wave Detail: SE 5 ft at 9 seconds and NE 1 foot at 4 seconds. .TONIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 6 ft. Wave Detail: E 6 ft at 9 seconds and NE 1 foot at 3 seconds. A chance of showers. Vsby 1 to 3 NM after midnight. .SAT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 5 to 6 ft. Wave Detail: E 6 ft at 9 seconds. A chance of showers. Vsby 1 NM or less in the morning. .SAT NIGHT...NE winds 10 to 15 kt. Seas 4 to 6 ft. Wave Detail: E 6 ft at 8 seconds. A chance of showers in the evening. .SUN AND SUN NIGHT...NE winds 5 to 10 kt. Seas 4 to 5 ft. Wave Detail: E 5 ft at 8 seconds and SE 1 foot at 11 seconds. .MON THROUGH TUE NIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. Wave Detail: E 4 ft at 8 seconds and S 2 ft at 3 seconds. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ251-180000- Massachusetts Bay and Ipswich Bay- 704 AM EDT Fri May 17 2024 .TODAY...NE winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 9 seconds and E 3 ft at 9 seconds. .TONIGHT...NE winds 10 to 15 kt. Seas 2 to 4 ft. Wave Detail: E 4 ft at 9 seconds and NE 1 foot at 3 seconds. A chance of showers after midnight. .SAT...NE winds 10 to 15 kt. Seas 3 to 5 ft. Wave Detail: E 5 ft at 9 seconds and NE 1 foot at 3 seconds. A chance of showers. .SAT NIGHT...N winds around 10 kt. Seas 3 to 5 ft. Wave Detail: E 5 ft at 9 seconds and NE 1 foot at 3 seconds. A chance of showers in the evening. .SUN AND SUN NIGHT...NE winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: E 4 ft at 8 seconds and N 1 foot at 3 seconds. .MON THROUGH TUE NIGHT...S winds 10 to 15 kt. Seas 2 to 4 ft. Wave Detail: E 4 ft at 8 seconds and S 2 ft at 3 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. $$ ANZ231-180000- Cape Cod Bay- 704 AM EDT Fri May 17 2024 .TODAY...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 9 seconds and E 3 ft at 9 seconds. A slight chance of showers. Vsby 1 NM or less this morning. .TONIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Wave Detail: E 4 ft at 9 seconds and N 2 ft at 3 seconds. A chance of showers. .SAT...NE winds 10 to 15 kt. Gusts up to 20 kt in the morning. Seas 2 to 4 ft. Wave Detail: E 4 ft at 9 seconds and N 2 ft at 3 seconds. A chance of showers. Vsby 1 NM or less in the morning. .SAT NIGHT...N winds around 10 kt. Seas 2 to 4 ft. Wave Detail: E 3 ft at 8 seconds and N 1 foot at 4 seconds. .SUN AND SUN NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at 8 seconds and N 2 ft at 4 seconds. .MON THROUGH TUE NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at 8 seconds and N 1 foot at 3 seconds. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ254-180000- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm- 704 AM EDT Fri May 17 2024 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE SATURDAY NIGHT... .TODAY...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 5 to 7 ft. Wave Detail: E 7 ft at 9 seconds and S 5 ft at 9 seconds. A chance of showers this morning. A slight chance of showers this afternoon. Vsby 1 NM or less. .TONIGHT...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 5 to 8 ft. Wave Detail: E 8 ft at 9 seconds and NE 1 foot at 3 seconds. A chance of showers. Vsby 1 NM or less after midnight. .SAT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 5 to 8 ft. Wave Detail: E 7 ft at 9 seconds and NE 1 foot at 3 seconds. A chance of showers in the morning with vsby 1 NM or less. .SAT NIGHT...N winds 10 to 15 kt. Seas 4 to 6 ft. Wave Detail: E 6 ft at 8 seconds and NE 1 foot at 2 seconds. .SUN AND SUN NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 6 ft. Wave Detail: E 5 ft at 8 seconds and N 1 foot at 3 seconds. .MON THROUGH TUE NIGHT...S winds 5 to 10 kt. Seas 3 to 5 ft. Wave Detail: E 4 ft at 8 seconds and S 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. $$ ANZ255-180000- Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket- 704 AM EDT Fri May 17 2024 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH SATURDAY EVENING... .TODAY...NE winds 15 to 20 kt with gusts up to 30 kt. Seas 5 to 8 ft. Wave Detail: E 7 ft at 8 seconds and S 3 ft at 8 seconds. A chance of showers, mainly this morning. Vsby 1 NM or less. .TONIGHT...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 5 to 7 ft. Wave Detail: E 6 ft at 8 seconds and NE 2 ft at 4 seconds. A chance of showers. Vsby 1 NM or less after midnight. .SAT...NE winds around 15 kt with gusts up to 20 kt. Seas 5 to 7 ft. Wave Detail: E 6 ft at 9 seconds and NE 2 ft at 4 seconds. A chance of showers in the morning with vsby 1 NM or less. .SAT NIGHT...N winds 10 to 15 kt. Seas 3 to 5 ft. Wave Detail: E 5 ft at 8 seconds and N 2 ft at 4 seconds. .SUN AND SUN NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. Wave Detail: E 4 ft at 8 seconds and N 2 ft at 4 seconds. .MON...NE winds 10 to 15 kt. Seas 3 to 5 ft. Wave Detail: E 4 ft at 8 seconds and NE 2 ft at 3 seconds. .MON NIGHT THROUGH TUE NIGHT...S winds around 10 kt. Seas 2 to 4 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ256-180000- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island- 704 AM EDT Fri May 17 2024 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH SATURDAY EVENING... .TODAY...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 5 to 7 ft. Wave Detail: E 6 ft at 8 seconds and NE 2 ft at 4 seconds. A slight chance of showers this morning with vsby 1 NM or less. .TONIGHT...NE winds around 15 kt with gusts up to 20 kt. Seas 4 to 6 ft. Wave Detail: E 6 ft at 8 seconds and NE 2 ft at 4 seconds. .SAT...NE winds 10 to 15 kt. Gusts up to 20 kt in the morning. Seas 4 to 6 ft. Wave Detail: E 6 ft at 9 seconds and NE 2 ft at 4 seconds. .SAT NIGHT...N winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: E 4 ft at 9 seconds and N 2 ft at 3 seconds. .SUN AND SUN NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. Wave Detail: E 4 ft at 8 seconds and N 2 ft at 4 seconds. .MON THROUGH TUE NIGHT...S winds 5 to 10 kt. Seas 2 to 4 ft. Wave Detail: E 3 ft at 8 seconds and NE 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. $$ ANZ232-180000- Nantucket Sound- 704 AM EDT Fri May 17 2024 .TODAY...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail: NE 3 ft at 4 seconds and E 3 ft at 9 seconds. A slight chance of showers. Vsby 1 NM or less, increasing to 1 to 3 NM this afternoon. .TONIGHT...NE winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail: E 4 ft at 9 seconds and NE 2 ft at 4 seconds. A chance of showers. .SAT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. Wave Detail: E 4 ft at 9 seconds and NE 2 ft at 3 seconds. A chance of showers in the morning with vsby 1 NM or less. .SAT NIGHT...N winds 10 to 15 kt. Seas 2 to 4 ft. Wave Detail: E 3 ft at 9 seconds and NE 2 ft at 3 seconds. .SUN AND SUN NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: N 2 ft at 4 seconds and E 2 ft at 8 seconds. .MON THROUGH TUE NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: NE 2 ft at 3 seconds and E 2 ft at 8 seconds. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ233-180000- Vineyard Sound- 704 AM EDT Fri May 17 2024 .TODAY...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 8 seconds and NE 2 ft at 3 seconds. A slight chance of showers this morning with vsby 1 NM or less. .TONIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at 8 seconds and NE 2 ft at 3 seconds. A chance of showers after midnight. .SAT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: E 2 ft at 9 seconds and NE 1 foot at 3 seconds. .SAT NIGHT...N winds 10 to 15 kt. Seas around 2 ft. Wave Detail: E 2 ft at 9 seconds and N 1 foot at 4 seconds. .SUN AND SUN NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: N 1 foot at 4 seconds and E 1 foot at 8 seconds. .MON THROUGH TUE NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: NE 1 foot at 2 seconds and SE 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. $$ ANZ234-180000- Buzzards Bay- 704 AM EDT Fri May 17 2024 .TODAY...NE winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: NE 2 ft at 3 seconds and S 2 ft at 8 seconds. A slight chance of showers this morning with vsby 1 NM or less. .TONIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: NE 2 ft at 3 seconds and E 2 ft at 8 seconds. A chance of showers after midnight. .SAT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: E 2 ft at 9 seconds and NE 1 foot at 3 seconds. .SAT NIGHT...N winds 10 to 15 kt. Seas around 2 ft. Wave Detail: E 2 ft at 9 seconds and NE 1 foot at 3 seconds. .SUN AND SUN NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: E 2 ft at 8 seconds and N 1 foot at 4 seconds. .MON THROUGH TUE NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: NE 1 foot at 2 seconds and E 1 foot at 8 seconds. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ235-180000- Rhode Island Sound- 704 AM EDT Fri May 17 2024 .TODAY...NE winds 10 to 15 kt with gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail: SE 5 ft at 9 seconds and S 4 ft at 8 seconds. A slight chance of showers this morning with vsby 1 NM or less. .TONIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Wave Detail: SE 4 ft at 8 seconds and NE 2 ft at 4 seconds. .SAT...NE 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 NE 2 ft at 3 seconds. .SAT NIGHT...N winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 8 seconds and N 2 ft at 3 seconds. .SUN AND SUN NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: NE 2 ft at 3 seconds and SE 2 ft at 8 seconds. .MON THROUGH TUE NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. Wave Detail: NE 2 ft at 3 seconds and SE 2 ft at 6 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. $$ ANZ237-180000- Block Island Sound- 704 AM EDT Fri May 17 2024 .TODAY...NE winds 10 to 15 kt with gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail: SE 5 ft at 8 seconds and S 4 ft at 8 seconds. .TONIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Wave Detail: E 4 ft at 9 seconds and NE 1 foot at 4 seconds. .SAT...NE winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at 9 seconds and NE 1 foot at 3 seconds. .SAT NIGHT...NE winds around 10 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at 9 seconds and NE 1 foot at 3 seconds. .SUN AND SUN NIGHT...NE winds around 10 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at 8 seconds and NE 2 ft at 4 seconds. .MON THROUGH TUE NIGHT...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E 2 ft at 4 seconds and E 2 ft at 8 seconds. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ230-180000- Boston Harbor- 704 AM EDT Fri May 17 2024 .TODAY...NE winds 5 to 10 kt, increasing to 10 to 15 kt this afternoon. Waves around 2 ft. .TONIGHT...NE winds around 10 kt. Waves around 2 ft in the evening, then 1 foot or less. A chance of showers after midnight. .SAT...NE winds around 10 kt. Waves 2 to 3 ft. A chance of showers. .SAT NIGHT...NE winds 5 to 10 kt. Waves 2 to 3 ft in the evening, then 1 foot or less. At the outer harbor entrance, waves 2 to 4 ft. A chance of showers in the evening. .SUN AND SUN NIGHT...NE winds 5 to 10 kt. Waves 2 to 3 ft. .MON THROUGH TUE NIGHT...S 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. $$ ANZ236-180000- Narragansett Bay- 704 AM EDT Fri May 17 2024 .TODAY...NE winds 10 to 15 kt with gusts up to 20 kt. Waves 2 to 3 ft. .TONIGHT...NE winds around 10 kt. Waves around 2 ft. .SAT...NE winds around 10 kt. Waves around 2 ft. .SAT NIGHT...N winds around 10 kt. Waves 2 to 3 ft. .SUN AND SUN NIGHT...NE winds 5 to 10 kt. Waves 2 to 3 ft. .MON THROUGH TUE NIGHT...SW winds 5 to 10 kt. Waves around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ 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