Coastal Waters Forecast
Issued by NWS Boston, MA
Issued by NWS Boston, MA
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584 FZUS51 KBOX 231704 CWFBOX Coastal Waters Forecast for Massachusetts and Rhode Island National Weather Service Boston/Norton MA 103 PM EDT Mon Sep 23 2024 Coastal waters from the Merrimack River MA to Watch Hill RI out to 25 NM ANZ200-240600- 103 PM EDT Mon Sep 23 2024 .Synopsis for Massachusetts and Rhode Island coastal waters... High pres over ern Canada will build over the waters through Tue, then move past the Maritimes Wed. A pair of fronts is expected to approach Thu, and cross the waters Thu night. This will be our next chance for unsettled weather. $$ ANZ250-240600- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 104 PM EDT Mon Sep 23 2024 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH TUESDAY EVENING... .THIS AFTERNOON...NE winds around 15 kt with gusts up to 20 kt. Seas 7 to 9 ft. Wave Detail: E 8 ft at 10 seconds and NE 1 foot at 3 seconds. A chance of sprinkles. .TONIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 6 to 8 ft. Wave Detail: E 8 ft at 10 seconds and NE 1 foot at 3 seconds. A chance of sprinkles in the evening. .TUE...NE winds around 15 kt with gusts up to 20 kt. Seas 6 to 7 ft. Wave Detail: E 7 ft at 10 seconds. .TUE NIGHT...E winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas 5 to 7 ft. Wave Detail: E 6 ft at 10 seconds and E 1 foot at 2 seconds. .WED...E winds around 10 kt. Seas 5 to 6 ft. Wave Detail: E 5 ft at 10 seconds. .WED NIGHT...SE winds 5 to 10 kt. Seas 5 to 6 ft. Wave Detail: E 6 ft at 11 seconds. A chance of showers after midnight. .THU AND THU NIGHT...S winds around 10 kt, becoming W. Seas 4 to 6 ft. A chance of showers. .FRI AND FRI NIGHT...N winds 10 to 15 kt. Gusts up to 20 kt. Seas 4 to 6 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ251-240600- Massachusetts Bay and Ipswich Bay- 104 PM EDT Mon Sep 23 2024 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH TUESDAY EVENING... .THIS AFTERNOON...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 6 to 7 ft. Wave Detail: E 7 ft at 10 seconds and NE 1 foot at 3 seconds. A chance of sprinkles. .TONIGHT...NE winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas 5 to 7 ft. Wave Detail: E 7 ft at 10 seconds and NE 1 foot at 3 seconds. A chance of sprinkles in the evening. .TUE...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 5 to 6 ft. Wave Detail: E 6 ft at 10 seconds and NE 1 foot at 3 seconds. .TUE NIGHT...E winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas 4 to 6 ft. Wave Detail: E 6 ft at 10 seconds and NE 1 foot at 3 seconds. .WED...E winds around 10 kt. Seas 4 to 5 ft. Wave Detail: E 5 ft at 9 seconds. .WED NIGHT...SE winds 5 to 10 kt. Seas 4 to 5 ft. Wave Detail: E 5 ft at 12 seconds. A chance of showers after midnight. .THU AND THU NIGHT...S winds 5 to 10 kt, becoming W. Seas 3 to 5 ft. A chance of showers. .FRI AND FRI NIGHT...N winds 10 to 15 kt. Gusts up to 20 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. $$ ANZ231-240600- Cape Cod Bay- 104 PM EDT Mon Sep 23 2024 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT... .THIS AFTERNOON...NE winds around 15 kt with gusts up to 20 kt. Seas 4 to 5 ft. Wave Detail: E 5 ft at 10 seconds and N 2 ft at 4 seconds. A chance of sprinkles. .TONIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 5 ft. Wave Detail: E 5 ft at 10 seconds and NE 2 ft at 4 seconds. A chance of sprinkles in the evening. .TUE...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. Wave Detail: E 4 ft at 10 seconds and NE 2 ft at 4 seconds. .TUE NIGHT...E winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas 3 to 4 ft. Wave Detail: E 4 ft at 10 seconds and NE 2 ft at 4 seconds. .WED...E winds around 10 kt. Seas 3 to 4 ft. Wave Detail: E 4 ft at 10 seconds and E 1 foot at 3 seconds. .WED NIGHT...SE winds 5 to 10 kt. Seas around 3 ft. Wave Detail: E 3 ft at 10 seconds and E 1 foot at 2 seconds. A chance of showers after midnight. .THU AND THU NIGHT...S winds 5 to 10 kt, becoming W. Seas 2 to 4 ft. A chance of showers. .FRI AND FRI NIGHT...N winds 10 to 15 kt. Gusts up to 20 kt. Seas 2 to 4 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ254-240600- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm- 104 PM EDT Mon Sep 23 2024 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH TUESDAY EVENING... .THIS AFTERNOON...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 8 to 10 ft. Wave Detail: E 9 ft at 10 seconds and NE 1 foot at 3 seconds. A chance of sprinkles. .TONIGHT...NE winds around 15 kt with gusts up to 25 kt. Seas 7 to 9 ft. Wave Detail: E 9 ft at 10 seconds and NE 1 foot at 3 seconds. .TUE...NE winds around 15 kt with gusts up to 20 kt. Seas 6 to 8 ft. Wave Detail: E 7 ft at 10 seconds and NE 1 foot at 3 seconds. .TUE NIGHT...E winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas 6 to 7 ft. Wave Detail: E 7 ft at 10 seconds and NE 1 foot at 3 seconds. .WED...E winds around 10 kt. Seas 5 to 7 ft. Wave Detail: E 6 ft at 10 seconds. .WED NIGHT...SE winds 5 to 10 kt. Seas 5 to 6 ft. Wave Detail: E 6 ft at 12 seconds. A chance of showers after midnight. .THU AND THU NIGHT...SE winds 5 to 10 kt, becoming W. Seas 4 to 6 ft. A chance of showers. .FRI...N winds 10 to 15 kt with gusts up to 20 kt. Seas 4 to 5 ft. .FRI NIGHT...N winds 10 to 15 kt with gusts up to 20 kt. Seas 5 to 7 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. $$ ANZ255-240600- Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket- 104 PM EDT Mon Sep 23 2024 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH TUESDAY EVENING... .THIS AFTERNOON...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 6 to 9 ft. Wave Detail: E 8 ft at 11 seconds and NE 2 ft at 4 seconds. .TONIGHT...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 5 to 8 ft. Wave Detail: E 8 ft at 10 seconds and NE 2 ft at 4 seconds. .TUE...NE winds 15 to 20 kt. Seas 5 to 7 ft. Wave Detail: E 7 ft at 10 seconds and NE 2 ft at 4 seconds. .TUE NIGHT...NE winds 15 to 20 kt, becoming E 10 to 15 kt after midnight. Seas 5 to 7 ft. Wave Detail: E 6 ft at 10 seconds and NE 2 ft at 4 seconds. .WED AND WED NIGHT...SE winds 10 to 15 kt. Seas 4 to 6 ft. Wave Detail: E 5 ft at 10 seconds and NE 1 foot at 3 seconds. .THU...SE winds 5 to 10 kt. Seas 4 to 6 ft. Wave Detail: E 5 ft at 12 seconds. A chance of showers. .THU NIGHT...W winds around 10 kt. Seas 3 to 5 ft. A chance of showers. .FRI AND FRI NIGHT...N winds 10 to 15 kt. Gusts up to 20 kt. Seas 3 to 5 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ256-240600- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island- 104 PM EDT Mon Sep 23 2024 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH TUESDAY EVENING... .THIS AFTERNOON...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 5 to 7 ft. Wave Detail: E 7 ft at 11 seconds and NE 1 foot at 4 seconds. .TONIGHT...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 5 to 7 ft. Wave Detail: E 7 ft at 11 seconds and NE 2 ft at 4 seconds. .TUE...NE winds 15 to 20 kt. Seas 5 to 6 ft. Wave Detail: E 6 ft at 10 seconds and NE 1 foot at 4 seconds. .TUE NIGHT...NE winds 15 to 20 kt, becoming E 10 to 15 kt after midnight. Seas 4 to 6 ft. Wave Detail: E 6 ft at 10 seconds and NE 1 foot at 3 seconds. .WED...E winds 10 to 15 kt. Seas 4 to 5 ft. Wave Detail: E 5 ft at 10 seconds. .WED NIGHT...E winds around 10 kt. Seas 4 to 5 ft. Wave Detail: E 5 ft at 10 seconds. A chance of showers after midnight. .THU AND THU NIGHT...S winds around 10 kt, becoming W. Seas 3 to 5 ft. A chance of showers. .FRI AND FRI NIGHT...N winds 10 to 15 kt. Gusts up to 20 kt. Seas 3 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. $$ ANZ232-240600- Nantucket Sound- 104 PM EDT Mon Sep 23 2024 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT... .THIS AFTERNOON...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 6 ft. Wave Detail: E 4 ft at 11 seconds and NE 2 ft at 4 seconds. A chance of sprinkles. .TONIGHT...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 6 ft. Wave Detail: E 5 ft at 11 seconds and NE 2 ft at 4 seconds. A chance of sprinkles in the evening. .TUE...NE winds around 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. Wave Detail: E 4 ft at 10 seconds and NE 2 ft at 4 seconds. .TUE NIGHT...E winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas 3 to 5 ft. Wave Detail: E 4 ft at 10 seconds and E 2 ft at 4 seconds. .WED...E winds 10 to 15 kt. Seas 2 to 4 ft. Wave Detail: E 3 ft at 10 seconds and E 2 ft at 3 seconds. .WED NIGHT...SE winds 5 to 10 kt. Seas 2 to 4 ft. Wave Detail: E 3 ft at 11 seconds and E 2 ft at 3 seconds. A chance of showers after midnight. .THU AND THU NIGHT...S winds 5 to 10 kt, becoming W. Seas 2 to 4 ft. A chance of showers. .FRI AND FRI NIGHT...N winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ233-240600- Vineyard Sound- 104 PM EDT Mon Sep 23 2024 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT... .THIS AFTERNOON...NE winds around 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. Wave Detail: E 3 ft at 10 seconds and NE 2 ft at 3 seconds. A chance of sprinkles. .TONIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Wave Detail: E 3 ft at 10 seconds and NE 2 ft at 3 seconds. A chance of sprinkles in the evening. .TUE...NE winds around 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: NE 2 ft at 3 seconds and E 2 ft at 10 seconds. .TUE NIGHT...E winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas 2 to 3 ft. Wave Detail: NE 2 ft at 3 seconds and E 2 ft at 10 seconds. .WED...E winds around 10 kt. Seas around 2 ft. Wave Detail: E 2 ft at 10 seconds and E 1 foot at 3 seconds. .WED NIGHT...SE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 10 seconds and E 1 foot at 2 seconds. A chance of showers after midnight. .THU AND THU NIGHT...S winds 5 to 10 kt, becoming W. Seas around 2 ft. A chance of showers. .FRI AND FRI NIGHT...N winds 10 to 15 kt. 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. $$ ANZ234-240600- Buzzards Bay- 104 PM EDT Mon Sep 23 2024 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT... .THIS AFTERNOON...NE winds around 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. Wave Detail: E 3 ft at 11 seconds and NE 2 ft at 3 seconds. A chance of sprinkles. .TONIGHT...NE winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas 2 to 4 ft. Wave Detail: E 3 ft at 11 seconds and NE 2 ft at 3 seconds. A chance of sprinkles in the evening. .TUE...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at 10 seconds and NE 2 ft at 3 seconds. .TUE NIGHT...NE winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas 2 to 4 ft. Wave Detail: E 3 ft at 10 seconds and NE 1 foot at 3 seconds. .WED...E winds around 10 kt. Seas 2 to 3 ft. Wave Detail: E 2 ft at 10 seconds and E 1 foot at 3 seconds. .WED NIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 2 ft at 10 seconds and E 1 foot at 2 seconds. A chance of showers after midnight. .THU AND THU NIGHT...S winds 5 to 10 kt, becoming W. Seas 2 to 3 ft. A chance of showers. .FRI AND FRI NIGHT...N winds 10 to 15 kt. Seas around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ235-240600- Rhode Island Sound- 104 PM EDT Mon Sep 23 2024 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT... .THIS AFTERNOON...NE winds around 15 kt with gusts up to 20 kt. Seas 4 to 5 ft. Wave Detail: E 4 ft at 11 seconds and NE 2 ft at 4 seconds. A chance of sprinkles. .TONIGHT...NE winds around 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. Wave Detail: E 4 ft at 11 seconds and NE 2 ft at 4 seconds. A chance of sprinkles in the evening. .TUE...NE winds around 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. Wave Detail: E 4 ft at 11 seconds and NE 2 ft at 3 seconds. .TUE NIGHT...E winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas 3 to 4 ft. Wave Detail: E 4 ft at 10 seconds and NE 2 ft at 4 seconds. .WED...E winds around 10 kt. Seas 3 to 4 ft. Wave Detail: SE 4 ft at 10 seconds and NE 1 foot at 3 seconds. .WED NIGHT...E winds 5 to 10 kt. Seas around 3 ft. Wave Detail: SE 3 ft at 10 seconds and E 1 foot at 3 seconds. A chance of showers after midnight. .THU AND THU NIGHT...S winds 5 to 10 kt, becoming W. Seas 2 to 3 ft. A chance of showers. .FRI AND FRI NIGHT...N 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. $$ ANZ237-240600- Block Island Sound- 104 PM EDT Mon Sep 23 2024 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT... .THIS AFTERNOON...NE winds around 15 kt with gusts up to 20 kt. Seas 4 to 5 ft. Wave Detail: E 5 ft at 11 seconds and NE 2 ft at 4 seconds. .TONIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. Wave Detail: E 5 ft at 11 seconds and NE 2 ft at 4 seconds. .TUE...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. Wave Detail: E 4 ft at 11 seconds and NE 1 foot at 4 seconds. .TUE NIGHT...E winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas 3 to 4 ft. Wave Detail: E 4 ft at 10 seconds and NE 1 foot at 4 seconds. .WED...E winds around 10 kt. Seas 3 to 4 ft. Wave Detail: E 4 ft at 10 seconds and NE 1 foot at 3 seconds. .WED NIGHT...E winds 5 to 10 kt. Seas around 3 ft. Wave Detail: E 3 ft at 10 seconds. A chance of showers. .THU AND THU NIGHT...S winds 5 to 10 kt, becoming W. Seas 2 to 3 ft. A chance of showers. .FRI AND FRI NIGHT...N winds 10 to 15 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ230-240600- Boston Harbor- 104 PM EDT Mon Sep 23 2024 .THIS AFTERNOON...NE winds 10 to 15 kt with gusts up to 20 kt. Waves 2 to 3 ft, except 4 to 6 ft at the outer harbor entrance. A chance of sprinkles. .TONIGHT...NE winds 10 to 15 kt. Gusts up to 20 kt in the evening. Waves 2 to 3 ft, except 4 to 6 ft at the outer harbor entrance. A chance of sprinkles in the evening. .TUE...NE winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Waves 2 to 3 ft. .TUE NIGHT...E winds 10 to 15 kt, diminishing to 5 to 10 kt after midnight. Waves 2 to 3 ft in the evening, then 1 foot or less. At the outer harbor entrance, waves 2 to 4 ft. .WED...E winds 5 to 10 kt. Waves 1 foot or less, except 2 to 4 ft at the outer harbor entrance. .WED NIGHT...SE winds 5 to 10 kt. Waves 1 foot or less, except 2 to 4 ft at the outer harbor entrance. A chance of showers. .THU AND THU NIGHT...S winds 5 to 10 kt, becoming W. Waves 1 foot or less, except 2 to 4 ft at the outer harbor entrance. A chance of showers. .FRI AND FRI NIGHT...N winds around 10 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. $$ ANZ236-240600- Narragansett Bay- 104 PM EDT Mon Sep 23 2024 .THIS AFTERNOON...NE winds 10 to 15 kt with gusts up to 20 kt. Waves 2 to 3 ft. A chance of sprinkles. .TONIGHT...NE winds 10 to 15 kt. Gusts up to 20 kt in the evening. Waves 2 to 3 ft. A chance of sprinkles in the evening. .TUE...NE winds around 10 kt. Gusts up to 20 kt in the afternoon. Waves 2 to 3 ft. .TUE NIGHT...NE winds 5 to 10 kt. Waves 2 to 3 ft. .WED...E winds 5 to 10 kt. Waves 2 to 3 ft. .WED NIGHT...SE winds 5 to 10 kt. Waves 2 to 3 ft. A chance of showers. .THU AND THU NIGHT...S winds 5 to 10 kt, becoming W. Waves 2 to 3 ft. A chance of showers. .FRI AND FRI NIGHT...N winds 5 to 10 kt. Waves 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ 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