


Coastal Waters Forecast
Issued by NWS Boston, MA
Issued by NWS Boston, MA
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143 FZUS51 KBOX 142159 CWFBOX Coastal Waters Forecast for Massachusetts and Rhode Island National Weather Service Boston/Norton MA 559 PM EDT Sat Jun 14 2025 Coastal waters from the Merrimack River MA to Watch Hill RI out to 25 NM ANZ200-151100- 559 PM EDT Sat Jun 14 2025 .Synopsis for Massachusetts and Rhode Island coastal waters... A wave of low pressure south of New England will provide gusty NE winds across the waters of RI and southern MA this evening. Winds diminish overnight into Sunday, as high pres from the Maritimes builds into the eastern MA waters. This high will move offshore Mon then another low pres will track S of the waters Tue. Weak high pres builds into the waters Wed. $$ ANZ250-151100- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 559 PM EDT Sat Jun 14 2025 .TONIGHT...E winds 10 to 15 kt. Gusts up to 20 kt early. Seas 2 to 3 ft. Wave Detail: E 2 ft at 4 seconds and SE 1 foot at 9 seconds. .SUN...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 2 ft at 6 seconds and SE 1 foot at 9 seconds. .SUN NIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 7 seconds. .MON...SE winds 5 to 10 kt, increasing to 10 to 15 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: E 3 ft at 8 seconds and SE 1 foot at 4 seconds. .MON NIGHT THROUGH TUE NIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 7 seconds and S 1 foot at 4 seconds. .WED AND WED NIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 8 seconds and S 2 ft at 3 seconds. .THU AND THU NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ251-151100- Massachusetts Bay and Ipswich Bay- 559 PM EDT Sat Jun 14 2025 .TONIGHT...E winds 10 to 15 kt with gusts up to 20 kt, becoming NE 5 to 10 kt after midnight. Seas around 2 ft. Wave Detail: E 2 ft at 4 seconds and SE 1 foot at 8 seconds. .SUN...E winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E 2 ft at 5 seconds and SE 1 foot at 9 seconds. .SUN NIGHT...SE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 7 seconds. .MON...SE winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: E 3 ft at 8 seconds and SE 1 foot at 4 seconds. .MON NIGHT...S 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: SE 3 ft at 8 seconds. .TUE AND TUE NIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 7 seconds and S 1 foot at 4 seconds. .WED AND WED NIGHT...S winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. .THU AND THU NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 3 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. $$ ANZ231-151100- Cape Cod Bay- 559 PM EDT Sat Jun 14 2025 .TONIGHT...E winds 10 to 15 kt. Gusts up to 20 kt early. Seas 2 to 3 ft. Wave Detail: E 2 ft at 3 seconds and SE 1 foot at 7 seconds. A slight chance of showers. .SUN...E winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E 1 foot at 3 seconds and SE 1 foot at 9 seconds. .SUN NIGHT...E winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E 2 ft at 2 seconds and SE 1 foot at 7 seconds. .MON...SE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 3 seconds and S 1 foot at 7 seconds. .MON NIGHT AND TUE...SE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 5 seconds. .TUE NIGHT...S winds 5 to 10 kt. Seas around 2 ft in the evening, then 1 foot or less. Wave Detail: SE 2 ft at 5 seconds, becoming S 1 foot at 2 seconds and SE 1 foot at 6 seconds. .WED AND WED NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. .THU AND THU NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ254-151100- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm- 559 PM EDT Sat Jun 14 2025 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 AM EDT SUNDAY... .TONIGHT...NE winds 10 to 15 kt with gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail: E 3 ft at 5 seconds. A chance of showers, mainly early. .SUN...E winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at 6 seconds and SE 1 foot at 9 seconds. .SUN NIGHT...E winds 5 to 10 kt. Seas 2 to 4 ft. Wave Detail: SE 4 ft at 8 seconds and S 2 ft at 7 seconds. .MON...E winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: E 4 ft at 8 seconds and S 2 ft at 7 seconds. .MON NIGHT THROUGH TUE NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at 8 seconds and S 2 ft at 7 seconds. .WED THROUGH THU NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: S 4 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. $$ ANZ255-151100- Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket- 559 PM EDT Sat Jun 14 2025 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 AM EDT SUNDAY... .TONIGHT...NE winds 15 to 20 kt. Gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail: E 4 ft at 4 seconds and SE 2 ft at 9 seconds. A chance of showers, mainly early. .SUN...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. Wave Detail: SE 4 ft at 7 seconds. .SUN NIGHT...E winds 10 to 15 kt. Seas 2 to 4 ft. Wave Detail: SE 3 ft at 7 seconds. .MON...E winds around 10 kt. Seas 2 to 4 ft. Wave Detail: E 3 ft at 8 seconds and S 2 ft at 7 seconds. .MON NIGHT AND TUE...SE winds around 10 kt. Seas 2 to 4 ft. Wave Detail: E 3 ft at 8 seconds and S 1 foot at 7 seconds. .TUE NIGHT...SE winds around 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 7 seconds. .WED THROUGH THU...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. .THU NIGHT...SW winds around 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ256-151100- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island- 559 PM EDT Sat Jun 14 2025 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 AM EDT SUNDAY... .TONIGHT...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 5 to 6 ft, subsiding to 3 to 5 ft after midnight. Wave Detail: E 4 ft at 5 seconds and SE 1 foot at 9 seconds, becoming E 4 ft at 6 seconds and SE 1 foot at 9 seconds. A chance of showers, mainly early. .SUN...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. Wave Detail: E 4 ft at 6 seconds and S 2 ft at 8 seconds. .SUN NIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: SE 3 ft at 7 seconds. .MON...E winds around 10 kt. Seas 3 to 4 ft. Wave Detail: E 3 ft at 8 seconds and S 2 ft at 8 seconds. .MON NIGHT AND TUE...E winds around 10 kt. Seas 3 to 4 ft. Wave Detail: E 3 ft at 8 seconds and S 1 foot at 8 seconds. .TUE NIGHT...SE winds around 10 kt, becoming S after midnight. Seas around 3 ft. Wave Detail: E 3 ft at 7 seconds and SE 3 ft at 8 seconds. .WED THROUGH THU...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 4 ft. .THU NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 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. $$ ANZ232-151100- Nantucket Sound- 559 PM EDT Sat Jun 14 2025 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 AM EDT SUNDAY... .TONIGHT...NE winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: SE 3 ft at 5 seconds. A chance of showers, mainly early. .SUN...NE winds 10 to 15 kt. Seas around 2 ft. Wave Detail: E 2 ft at 5 seconds and S 1 foot at 8 seconds. .SUN NIGHT...E winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 7 seconds. .MON...E winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 7 seconds. .MON NIGHT AND TUE...SE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 7 seconds. .TUE NIGHT...SE winds around 10 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 7 seconds. .WED THROUGH THU NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ233-151100- Vineyard Sound- 559 PM EDT Sat Jun 14 2025 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 AM EDT SUNDAY... .TONIGHT...NE winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: NE 2 ft at 3 seconds and S 1 foot at 7 seconds. A chance of showers, mainly early. .SUN...NE winds 10 to 15 kt. Seas around 2 ft. Wave Detail: NE 1 foot at 3 seconds and S 1 foot at 8 seconds. .SUN NIGHT...E winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E 1 foot at 3 seconds and S 1 foot at 7 seconds. .MON...E winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E 1 foot at 3 seconds and S 1 foot at 7 seconds. .MON NIGHT AND TUE...SE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E 1 foot at 4 seconds and S 1 foot at 7 seconds. .TUE NIGHT...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 6 seconds. .WED AND WED NIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt. Seas around 2 ft. .THU AND THU NIGHT...SW winds 15 to 20 kt with gusts up to 25 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. $$ ANZ234-151100- Buzzards Bay- 559 PM EDT Sat Jun 14 2025 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 AM EDT SUNDAY... .TONIGHT...NE winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: NE 2 ft at 3 seconds and S 1 foot at 7 seconds. A chance of showers, mainly early. .SUN...NE winds 10 to 15 kt. Seas around 2 ft. Wave Detail: NE 1 foot at 3 seconds and S 1 foot at 8 seconds. .SUN NIGHT...E winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E 1 foot at 3 seconds and S 1 foot at 7 seconds. .MON...E winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E 1 foot at 2 seconds and S 1 foot at 7 seconds. .MON NIGHT AND TUE...SE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE 1 foot at 6 seconds. .TUE NIGHT...S winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: SE 1 foot at 5 seconds. .WED AND WED NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. .THU AND THU NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ235-151100- Rhode Island Sound- 559 PM EDT Sat Jun 14 2025 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 AM EDT SUNDAY... .TONIGHT...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. Wave Detail: E 4 ft at 6 seconds. A chance of showers, mainly early. .SUN...NE winds 10 to 15 kt. Gusts up to 20 kt in the morning. Seas 2 to 3 ft. Wave Detail: NE 3 ft at 5 seconds and S 2 ft at 8 seconds. .SUN NIGHT...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 7 seconds. .MON...E winds around 10 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at 8 seconds and S 2 ft at 8 seconds. .MON NIGHT AND TUE...SE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 8 seconds and S 1 foot at 7 seconds. .TUE NIGHT...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 7 seconds. .WED THROUGH THU NIGHT...SW winds 15 to 20 kt with gusts up to 25 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. $$ ANZ237-151100- Block Island Sound- 559 PM EDT Sat Jun 14 2025 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 AM EDT SUNDAY... .TONIGHT...NE winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail: E 3 ft at 4 seconds and SE 2 ft at 8 seconds. A chance of showers, mainly early. .SUN...E winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 7 seconds. .SUN NIGHT...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 7 seconds. .MON...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at 8 seconds and S 2 ft at 8 seconds. .MON NIGHT AND TUE...SE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at 8 seconds and S 1 foot at 8 seconds. .TUE NIGHT...S winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 7 seconds. .WED AND WED NIGHT...SW winds 10 to 15 kt. Seas around 2 ft. .THU...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. A chance of showers. .THU NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ230-151100- Boston Harbor- 559 PM EDT Sat Jun 14 2025 .TONIGHT...E winds 10 to 15 kt with gusts up to 20 kt, becoming NE 5 to 10 kt. Waves around 2 ft early, then 1 foot or less. .SUN...E winds 5 to 10 kt. Waves 1 foot or less. .SUN NIGHT...SE winds 5 to 10 kt. Waves 1 foot or less. .MON...SE winds 5 to 10 kt, increasing to 10 to 15 kt in the afternoon. Waves 1 foot or less, then around 2 ft in the afternoon. .MON NIGHT...S winds 10 to 15 kt, diminishing to 5 to 10 kt after midnight. Waves around 2 ft in the evening, then 1 foot or less. .TUE AND TUE NIGHT...S winds 10 to 15 kt. Waves around 2 ft. .WED AND WED NIGHT...S winds 10 to 15 kt. Gusts up to 20 kt. Waves around 2 ft. .THU AND THU NIGHT...SW winds 15 to 20 kt with gusts up to 25 kt. Waves 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. $$ ANZ236-151100- Narragansett Bay- 559 PM EDT Sat Jun 14 2025 .TONIGHT...NE winds 10 to 15 kt. Gusts up to 20 kt early. Waves 2 to 3 ft. A slight chance of showers. .SUN...NE winds around 10 kt, becoming E in the afternoon. Waves around 2 ft. .SUN NIGHT...E winds 5 to 10 kt. Waves around 2 ft. .MON...E winds 5 to 10 kt, becoming SE in the afternoon. Waves around 2 ft. .MON NIGHT AND TUE...SE winds 5 to 10 kt. Waves around 2 ft. .TUE NIGHT...S winds 5 to 10 kt. Waves around 2 ft. .WED AND WED NIGHT...SW winds 10 to 15 kt. Waves around 2 ft. .THU AND THU NIGHT...SW winds 10 to 15 kt with gusts up to 25 kt. Waves 2 to 3 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ 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