Coastal Waters Forecast
Issued by NWS Boston, MA
Issued by NWS Boston, MA
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791 FZUS51 KBOX 241404 CWFBOX Coastal Waters Forecast for Massachusetts and Rhode Island National Weather Service Boston/Norton MA 1004 AM EDT Tue Sep 24 2024 Coastal waters from the Merrimack River MA to Watch Hill RI out to 25 NM ANZ200-250300- 1004 AM EDT Tue Sep 24 2024 .Synopsis for Massachusetts and Rhode Island coastal waters... High pressure will keep E onshore flow through Wed. Low pressure will bring showers Wed night through Thur. High pres builds back in for Fri into the weekend. $$ ANZ250-250300- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 1004 AM EDT Tue Sep 24 2024 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH WEDNESDAY EVENING... .THIS AFTERNOON...E winds 10 to 15 kt. Gusts up to 20 kt. Seas 6 to 7 ft. Wave Detail: E 6 ft at 10 seconds. A chance of sprinkles. .TONIGHT...E winds 10 to 15 kt. Seas 5 to 7 ft. Wave Detail: E 6 ft at 10 seconds. A chance of sprinkles in the evening. .WED...E winds 10 to 15 kt. Seas 5 to 6 ft. Wave Detail: E 6 ft at 10 seconds. Patchy fog in the morning with vsby 1 NM or less. .WED NIGHT...SE winds 5 to 10 kt. Seas 5 to 6 ft. Wave Detail: E 6 ft at 11 seconds. A chance of showers after midnight. .THU...S winds 5 to 10 kt. Seas 5 to 6 ft. Wave Detail: E 6 ft at 12 seconds. A chance of showers. .THU NIGHT...SW winds around 10 kt, becoming NW after midnight. Seas 4 to 6 ft. Wave Detail: E 6 ft at 11 seconds. A chance of showers. .FRI THROUGH SAT NIGHT...NE winds 10 to 15 kt. Seas 3 to 5 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ251-250300- Massachusetts Bay and Ipswich Bay- 1004 AM EDT Tue Sep 24 2024 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH WEDNESDAY EVENING... .THIS AFTERNOON...NE winds 10 to 15 kt. Seas 5 to 6 ft. Wave Detail: E 6 ft at 10 seconds and NE 1 foot at 3 seconds. A chance of sprinkles. .TONIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. Wave Detail: E 6 ft at 10 seconds and E 1 foot at 3 seconds. A chance of sprinkles in the evening. Patchy fog after midnight. .WED...E winds around 10 kt. Seas 4 to 5 ft. Wave Detail: E 5 ft at 10 seconds. .WED NIGHT...SE winds 5 to 10 kt. Seas 4 to 5 ft. Wave Detail: E 5 ft at 11 seconds. A chance of showers after midnight. .THU...S winds 5 to 10 kt. Seas 4 to 5 ft. Wave Detail: E 5 ft at 12 seconds and S 1 foot at 2 seconds. A chance of showers. .THU NIGHT...SW winds around 10 kt, becoming NW after midnight. Seas 3 to 5 ft. Wave Detail: E 5 ft at 11 seconds and SW 1 foot at 3 seconds. A chance of showers in the evening. .FRI THROUGH SAT NIGHT...NE winds 10 to 15 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. $$ ANZ231-250300- Cape Cod Bay- 1004 AM EDT Tue Sep 24 2024 .THIS AFTERNOON...NE winds 10 to 15 kt. Gusts up to 20 kt. Seas 2 to 4 ft. Wave Detail: E 4 ft at 10 seconds and NE 2 ft at 3 seconds. A chance of sprinkles. .TONIGHT...E winds 10 to 15 kt. Seas 2 to 4 ft. Wave Detail: E 4 ft at 10 seconds and E 2 ft at 3 seconds. A chance of sprinkles in the evening. Patchy fog after midnight with vsby 1 to 3 NM. .WED...E winds around 10 kt. Seas 2 to 4 ft. Wave Detail: E 4 ft at 10 seconds and E 1 foot at 3 seconds. Patchy fog in the morning with vsby 1 to 3 NM. .WED NIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at 11 seconds and E 1 foot at 2 seconds. .THU...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at 11 seconds and SE 1 foot at 2 seconds. A chance of showers. .THU NIGHT...SW winds around 10 kt, becoming NW after midnight. Seas 2 to 3 ft. Wave Detail: E 3 ft at 11 seconds and SW 1 foot at 2 seconds. A chance of showers. .FRI THROUGH SAT NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ254-250300- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm- 1004 AM EDT Tue Sep 24 2024 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH WEDNESDAY EVENING... .THIS AFTERNOON...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. A chance of sprinkles. .TONIGHT...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 E 1 foot at 3 seconds. Patchy fog after midnight with vsby 1 NM or less. .WED...E winds 10 to 15 kt. Seas 5 to 7 ft. Wave Detail: E 7 ft at 10 seconds. Patchy fog in the morning with vsby 1 NM or less. .WED NIGHT...E winds 5 to 10 kt. Seas 5 to 6 ft. Wave Detail: E 6 ft at 12 seconds. .THU...SE winds 5 to 10 kt. Seas 5 to 6 ft. Wave Detail: E 6 ft at 12 seconds. A chance of showers. .THU NIGHT...SW winds around 10 kt, becoming NW after midnight. Seas 4 to 6 ft. Wave Detail: E 6 ft at 11 seconds. A chance of showers. .FRI THROUGH SAT NIGHT...NE winds 10 to 15 kt with 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. $$ ANZ255-250300- Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket- 1004 AM EDT Tue Sep 24 2024 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH WEDNESDAY EVENING... .THIS AFTERNOON...NE winds 15 to 20 kt. Seas 5 to 7 ft. Wave Detail: E 6 ft at 10 seconds and NE 2 ft at 4 seconds. .TONIGHT...E winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas 5 to 7 ft. Wave Detail: E 6 ft at 10 seconds and NE 1 foot at 4 seconds. .WED...E winds 10 to 15 kt. Seas 4 to 6 ft. Wave Detail: E 6 ft at 10 seconds and E 1 foot at 3 seconds. .WED NIGHT...E winds 5 to 10 kt. Seas 4 to 6 ft. Wave Detail: E 5 ft at 11 seconds. .THU...SE winds 5 to 10 kt. Seas 4 to 6 ft. Wave Detail: E 5 ft at 12 seconds. A chance of showers. .THU NIGHT...SW winds around 10 kt, becoming NW after midnight. Seas 3 to 5 ft. Wave Detail: E 5 ft at 11 seconds and SW 2 ft at 4 seconds. A chance of showers. .FRI THROUGH SAT NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ256-250300- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island- 1004 AM EDT Tue Sep 24 2024 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH WEDNESDAY EVENING... .THIS AFTERNOON...NE winds around 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. .TONIGHT...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 10 to 15 kt. Seas 4 to 5 ft. Wave Detail: E 5 ft at 10 seconds. .WED NIGHT...SE winds 10 to 15 kt. Seas 3 to 5 ft. Wave Detail: E 5 ft at 10 seconds. .THU...S winds around 10 kt. Seas 3 to 5 ft. Wave Detail: E 5 ft at 12 seconds. A chance of showers. .THU NIGHT...SW winds around 10 kt, becoming NW after midnight. Seas 3 to 5 ft. Wave Detail: E 5 ft at 11 seconds and SW 2 ft at 4 seconds. A chance of showers. .FRI THROUGH SAT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. .SAT NIGHT...NE winds 10 to 15 kt with 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. $$ ANZ232-250300- Nantucket Sound- 1004 AM EDT Tue Sep 24 2024 .THIS AFTERNOON...NE winds around 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Wave Detail: E 4 ft at 10 seconds and E 2 ft at 4 seconds. A chance of sprinkles. .TONIGHT...E winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas 2 to 4 ft. Wave Detail: E 4 ft at 10 seconds and E 2 ft at 4 seconds. A chance of sprinkles in the evening. .WED...E winds 10 to 15 kt. Seas 2 to 4 ft. Wave Detail: E 3 ft at 10 seconds and E 2 ft at 3 seconds. .WED NIGHT...SE winds 5 to 10 kt. Seas 2 to 4 ft. Wave Detail: E 3 ft at 11 seconds and E 1 foot at 3 seconds. .THU...SE winds 5 to 10 kt. Seas 2 to 4 ft. Wave Detail: E 3 ft at 12 seconds and S 1 foot at 3 seconds. A chance of showers. .THU NIGHT...SW winds around 10 kt, becoming NW after midnight. Seas 2 to 3 ft. Wave Detail: E 3 ft at 12 seconds and S 1 foot at 3 seconds. A chance of showers. .FRI THROUGH SAT NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ233-250300- Vineyard Sound- 1004 AM EDT Tue Sep 24 2024 .THIS AFTERNOON...NE winds 10 to 15 kt. Gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: E 2 ft at 10 seconds and NE 1 foot at 3 seconds. A chance of sprinkles. .TONIGHT...E winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: E 2 ft at 10 seconds and NE 1 foot at 3 seconds. A chance of sprinkles in the evening. .WED...E winds around 10 kt. Seas around 2 ft. Wave Detail: E 2 ft at 10 seconds and SE 1 foot at 4 seconds. .WED NIGHT...SE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E 2 ft at 11 seconds and E 1 foot at 2 seconds. .THU...SE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: SE 2 ft at 11 seconds and SE 1 foot at 2 seconds. A chance of showers. .THU NIGHT...SW winds around 10 kt, becoming NW after midnight. Seas around 2 ft. Wave Detail: SE 2 ft at 11 seconds and SW 1 foot at 3 seconds. A chance of showers. .FRI THROUGH SAT NIGHT...NE winds 10 to 15 kt with gusts up to 20 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. $$ ANZ234-250300- Buzzards Bay- 1004 AM EDT Tue Sep 24 2024 .THIS AFTERNOON...NE winds 10 to 15 kt. Gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at 10 seconds and NE 1 foot at 3 seconds. A chance of sprinkles. .TONIGHT...NE winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at 10 seconds and NE 1 foot at 3 seconds. A chance of sprinkles in the evening. .WED...E winds around 10 kt. Seas 2 to 3 ft. Wave Detail: E 2 ft at 10 seconds and E 1 foot at 2 seconds. .WED NIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 2 ft at 10 seconds and E 1 foot at 2 seconds. .THU...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 2 ft at 11 seconds and SE 1 foot at 2 seconds. A chance of showers. .THU NIGHT...SW winds around 10 kt, becoming NW after midnight. Seas 2 to 3 ft. Wave Detail: E 2 ft at 11 seconds and SW 1 foot at 3 seconds. A chance of showers. .FRI THROUGH SAT NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ235-250300- Rhode Island Sound- 1004 AM EDT Tue Sep 24 2024 .THIS AFTERNOON...NE winds around 15 kt. 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. A chance of sprinkles. .TONIGHT...NE winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: E 4 ft at 10 seconds and NE 2 ft at 4 seconds. A chance of sprinkles in the evening. .WED...E winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: SE 4 ft at 10 seconds and NE 1 foot at 3 seconds. .WED NIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 10 seconds and E 1 foot at 3 seconds. .THU...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 12 seconds and S 1 foot at 3 seconds. A chance of showers. .THU NIGHT...W winds around 10 kt, becoming NW after midnight. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 12 seconds and S 2 ft at 4 seconds. A chance of showers. .FRI THROUGH SAT NIGHT...NE 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. $$ ANZ237-250300- Block Island Sound- 1004 AM EDT Tue Sep 24 2024 .THIS AFTERNOON...NE winds around 15 kt. Gusts up to 20 kt. Seas 3 to 4 ft. Wave Detail: E 4 ft at 10 seconds and NE 1 foot at 3 seconds. .TONIGHT...E winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas 3 to 4 ft. Wave Detail: E 4 ft at 10 seconds and NE 1 foot at 4 seconds. .WED...E winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: E 4 ft at 10 seconds and NE 1 foot at 3 seconds. .WED NIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at 10 seconds and NE 1 foot at 3 seconds. A chance of showers after midnight. .THU...SE winds 5 to 10 kt, becoming S in the afternoon. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 12 seconds. A chance of showers. .THU NIGHT...W winds 5 to 10 kt, becoming NW after midnight. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 12 seconds and SW 1 foot at 4 seconds. .FRI THROUGH SAT NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ230-250300- Boston Harbor- 1004 AM EDT Tue Sep 24 2024 .THIS AFTERNOON...NE winds 10 to 15 kt. Waves 2 to 3 ft. A chance of sprinkles. .TONIGHT...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. A chance of sprinkles in the evening. Patchy fog after midnight. .WED...E winds around 10 kt. Waves 1 foot or less, then around 2 ft in the afternoon. At the outer harbor entrance, waves 2 to 4 ft. .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 after midnight. .THU...S winds 5 to 10 kt. Waves 1 foot or less, then around 2 ft in the afternoon. At the outer harbor entrance, waves 2 to 4 ft. A chance of showers. .THU NIGHT...SW winds 5 to 10 kt, becoming NW after midnight. Waves 1 foot or less, except 2 to 4 ft at the outer harbor entrance. A chance of showers in the evening. .FRI THROUGH SAT 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. $$ ANZ236-250300- Narragansett Bay- 1004 AM EDT Tue Sep 24 2024 .THIS AFTERNOON...NE winds around 10 kt. Waves 2 to 3 ft. A chance of sprinkles. .TONIGHT...NE winds 5 to 10 kt. Waves 2 to 3 ft. A chance of sprinkles in the evening. .WED...E winds 5 to 10 kt. Waves 2 to 3 ft. .WED NIGHT...SE winds 5 to 10 kt. Waves 2 to 3 ft. A chance of showers after midnight. .THU...S winds 5 to 10 kt. Waves 2 to 3 ft. A chance of showers. .THU NIGHT...W winds 5 to 10 kt, becoming NW after midnight. Waves 2 to 3 ft. A chance of showers in the evening. .FRI THROUGH SAT NIGHT...NE winds 5 to 10 kt. Waves 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ 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