Coastal Waters Forecast
Issued by NWS Boston, MA

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000 FZUS51 KBOX 220802 CWFBOX Coastal Waters Forecast for Massachusetts and Rhode Island National Weather Service Boston/Norton MA 401 AM EDT Fri Sep 22 2023 Coastal waters from the Merrimack River MA to Watch Hill RI out to 25 NM ANZ200-222100- 401 AM EDT Fri Sep 22 2023 .Synopsis for Massachusetts and Rhode Island coastal waters... High pressure moves south of Nova Scotia Friday, providing tranquil boating weather. Then potential tropical cyclone 16 tracks up the eastern seaboard this weekend, then south of New England Monday and across Georges Bank Monday night. This cyclone will bring periods of rain to the MA and RI waters this weekend and Monday, especially southern waters, along with gusty NE winds close to gale force across the RI waters. By Tuesday, the low should exit offshore and replaced by strong high pressure building across Quebec into New England. $$ ANZ250-222100- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 401 AM EDT Fri Sep 22 2023 .TODAY...E winds around 10 kt. Seas 2 to 3 ft. .TONIGHT...E winds around 10 kt. Seas 2 to 3 ft. .SAT...E winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Seas 3 to 5 ft. Rain likely. Vsby 1 to 3 NM. .SAT NIGHT...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 7 ft. Rain. Vsby 1 to 3 NM. .SUN AND SUN NIGHT...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 5 to 7 ft. A chance of showers. Vsby 1 to 3 NM. .MON AND MON NIGHT...NE winds 15 to 20 kt with gusts up to 30 kt. Seas 5 to 7 ft. A chance of showers. .TUE AND TUE NIGHT...NE winds 15 to 20 kt, diminishing to 10 to 15 kt. Gusts up to 25 kt. Seas 4 to 7 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ251-222100- Massachusetts Bay and Ipswich Bay- 401 AM EDT Fri Sep 22 2023 .TODAY...E winds 5 to 10 kt. Seas 2 to 3 ft. .TONIGHT...E winds around 10 kt. Seas around 2 ft. .SAT...E winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Seas 2 to 4 ft. Rain likely. Vsby 1 to 3 NM. .SAT NIGHT...NE winds 15 to 20 kt, increasing to 20 to 25 kt after midnight. Seas 4 to 6 ft. Rain. Vsby 1 to 3 NM. .SUN AND SUN NIGHT...NE winds 20 to 25 kt. Seas 4 to 6 ft. A chance of showers. Vsby 1 to 3 NM. .MON AND MON NIGHT...NE winds 15 to 20 kt with gusts up to 30 kt. Seas 4 to 6 ft. A chance of showers. .TUE AND TUE NIGHT...NE winds 15 to 20 kt, diminishing to 10 to 15 kt. Gusts up to 25 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. $$ ANZ231-222100- Cape Cod Bay- 401 AM EDT Fri Sep 22 2023 .TODAY...E winds 5 to 10 kt. Seas around 2 ft. .TONIGHT...E winds around 10 kt. Seas around 2 ft. .SAT...E winds 10 to 15 kt, becoming NE 15 to 20 kt in the afternoon. Gusts up to 25 kt. Seas 3 to 5 ft. Rain. Vsby 1 to 3 NM. .SAT NIGHT...NE winds 15 to 20 kt with gusts up to 30 kt. Seas 4 to 6 ft. Rain. Vsby 1 to 3 NM. .SUN...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 5 ft. A chance of showers. .SUN NIGHT...NE winds 10 to 15 kt with gusts up to 25 kt. Seas 3 to 5 ft. Showers likely. Vsby 1 to 3 NM. .MON AND MON NIGHT...NE winds 15 to 20 kt with gusts up to 30 kt. Seas 4 to 5 ft. A chance of showers. .TUE AND TUE NIGHT...NE winds 15 to 20 kt, diminishing to 10 to 15 kt. Gusts up to 25 kt. Seas 3 to 5 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ254-222100- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm- 401 AM EDT Fri Sep 22 2023 ...SMALL CRAFT ADVISORY IN EFFECT FROM SATURDAY MORNING THROUGH SUNDAY MORNING... .TODAY...E winds 10 to 15 kt. Seas 2 to 3 ft. .TONIGHT...E winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. .SAT...E winds 10 to 15 kt, increasing to 15 to 20 kt in the afternoon. Gusts up to 25 kt. Seas 4 to 7 ft. Rain. Vsby 1 to 3 NM. .SAT NIGHT...NE winds 15 to 20 kt with gusts up to 30 kt. Seas 6 to 9 ft. Rain. Vsby 1 to 3 NM. .SUN...E winds 10 to 15 kt with gusts up to 20 kt. Seas 6 to 8 ft. A chance of showers. .SUN NIGHT...NE winds 10 to 15 kt with gusts up to 25 kt. Seas 5 to 7 ft. A chance of showers. .MON AND MON NIGHT...NE winds 15 to 20 kt, increasing to 20 to 25 kt. Gusts up to 30 kt. Seas 5 to 7 ft. A chance of showers. .TUE AND TUE NIGHT...NE winds 15 to 20 kt, diminishing to 10 to 15 kt. Gusts up to 30 kt. Seas 6 to 7 ft, subsiding to 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. $$ ANZ255-222100- Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket- 401 AM EDT Fri Sep 22 2023 ...SMALL CRAFT ADVISORY IN EFFECT FROM THIS EVENING THROUGH SATURDAY MORNING... ...GALE WATCH IN EFFECT FROM SATURDAY MORNING THROUGH SATURDAY EVENING... .TODAY...E winds 10 to 15 kt. Seas 2 to 3 ft. .TONIGHT...E winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. .SAT...E winds 15 to 20 kt, becoming NE 20 to 25 kt in the afternoon. Gusts up to 30 kt. Seas 5 to 8 ft. Rain. Vsby 1 NM or less. .SAT NIGHT...NE winds 20 to 25 kt with gusts up to 30 kt. Seas 7 to 10 ft. Rain. Vsby 1 to 3 NM. .SUN...E winds 20 to 25 kt, diminishing to 15 to 20 kt in the afternoon. Seas 6 to 9 ft. A chance of showers. .SUN NIGHT...E winds 15 to 20 kt with gusts up to 25 kt. Seas 5 to 8 ft. A chance of showers. .MON AND MON NIGHT...NE winds 20 to 25 kt with gusts up to 30 kt. Seas 5 to 7 ft. A chance of showers. .TUE AND TUE NIGHT...NE winds 15 to 20 kt with gusts up to 30 kt. Seas 4 to 7 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ256-222100- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island- 401 AM EDT Fri Sep 22 2023 ...SMALL CRAFT ADVISORY IN EFFECT FROM THIS EVENING THROUGH SATURDAY MORNING... ...GALE WATCH IN EFFECT FROM SATURDAY MORNING THROUGH SATURDAY EVENING... .TODAY...E winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. .TONIGHT...E winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 6 ft. A chance of rain. .SAT...E winds 20 to 25 kt with gusts up to 35 kt. Seas 7 to 10 ft. Rain. Vsby 1 NM or less. .SAT NIGHT...NE winds 20 to 25 kt with gusts up to 30 kt. Seas 8 to 11 ft. Rain. Vsby 1 to 3 NM. .SUN...E winds 20 to 25 kt, diminishing to 15 to 20 kt in the afternoon. Gusts up to 30 kt. Seas 7 to 10 ft. Showers likely. .SUN NIGHT...NE winds 15 to 20 kt with gusts up to 30 kt. Seas 6 to 8 ft. Showers likely. .MON...NE winds 20 to 25 kt with gusts up to 30 kt. Seas 5 to 6 ft. Showers likely. .MON NIGHT AND TUE...NE winds around 20 kt with gusts up to 30 kt. Seas 5 to 7 ft. A chance of showers. .TUE NIGHT...NE winds 15 to 20 kt with gusts up to 25 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. $$ ANZ232-222100- Nantucket Sound- 401 AM EDT Fri Sep 22 2023 ...SMALL CRAFT ADVISORY IN EFFECT FROM SATURDAY MORNING THROUGH SUNDAY MORNING... .TODAY...E winds 10 to 15 kt. Seas around 2 ft. .TONIGHT...E winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. .SAT...E winds 15 to 20 kt, becoming NE 20 to 25 kt with gusts up to 30 kt in the afternoon. Seas 3 to 5 ft. Rain. Vsby 1 to 3 NM. .SAT NIGHT...NE winds 20 to 25 kt with gusts up to 30 kt. Seas 5 to 6 ft. Rain. Vsby 1 to 3 NM. .SUN...E winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 6 ft. A chance of showers. .SUN NIGHT...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. A chance of showers. .MON AND MON NIGHT...NE winds 15 to 20 kt with gusts up to 30 kt. Seas 3 to 5 ft. A chance of showers. .TUE...NE winds 15 to 20 kt with gusts up to 30 kt. Seas 3 to 5 ft. .TUE NIGHT...NE winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ233-222100- Vineyard Sound- 401 AM EDT Fri Sep 22 2023 ...SMALL CRAFT ADVISORY IN EFFECT FROM SATURDAY MORNING THROUGH SUNDAY MORNING... .TODAY...E winds 5 to 10 kt, increasing to 10 to 15 kt this afternoon. Seas around 2 ft. .TONIGHT...E winds 10 to 15 kt. Gusts up to 20 kt after midnight. Seas 2 to 3 ft. .SAT...NE winds 15 to 20 kt with gusts up to 30 kt. Seas 3 to 5 ft. Rain. Vsby 1 to 3 NM. .SAT NIGHT...NE winds 20 to 25 kt with gusts up to 30 kt. Seas 4 to 6 ft. Rain. Vsby 1 to 3 NM. .SUN...NE winds 20 to 25 kt, diminishing to 15 to 20 kt in the afternoon. Seas 4 to 5 ft. A chance of showers. .SUN NIGHT...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. Showers likely. .MON...NE winds 15 to 20 kt with gusts up to 30 kt. Seas 3 to 4 ft. Showers likely. .MON NIGHT...NE winds 15 to 20 kt with gusts up to 30 kt. Seas 3 to 4 ft. A chance of showers. .TUE AND TUE NIGHT...NE winds 15 to 20 kt, diminishing to 10 to 15 kt. 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. $$ ANZ234-222100- Buzzards Bay- 401 AM EDT Fri Sep 22 2023 ...SMALL CRAFT ADVISORY IN EFFECT FROM SATURDAY MORNING THROUGH SUNDAY MORNING... .TODAY...NE winds 5 to 10 kt, becoming E 10 to 15 kt this afternoon. Seas around 2 ft. .TONIGHT...E winds 10 to 15 kt. Gusts up to 20 kt after midnight. Seas around 2 ft. .SAT...E winds 10 to 15 kt, becoming NE 15 to 20 kt in the afternoon. Gusts up to 30 kt. Seas 3 to 5 ft. Rain. Vsby 1 to 3 NM. .SAT NIGHT...NE winds 20 to 25 kt with gusts up to 30 kt. Seas 4 to 5 ft. Rain. Vsby 1 to 3 NM. .SUN...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 5 ft. A chance of showers. .SUN NIGHT...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 4 ft. Showers likely. .MON...NE winds 15 to 20 kt with gusts up to 30 kt. Seas 3 to 4 ft. Showers likely. .MON NIGHT...NE winds 15 to 20 kt with gusts up to 30 kt. Seas around 4 ft. A chance of showers. .TUE AND TUE NIGHT...NE winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ235-222100- Rhode Island Sound- 401 AM EDT Fri Sep 22 2023 ...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH SATURDAY AFTERNOON... ...GALE WATCH IN EFFECT FROM SATURDAY AFTERNOON THROUGH SATURDAY EVENING... .TODAY...E winds 10 to 15 kt. Seas 2 to 3 ft. .TONIGHT...E winds 15 to 20 kt. Seas 2 to 4 ft. .SAT...E winds 15 to 20 kt, becoming NE 20 to 25 kt in the afternoon. Gusts up to 30 kt. Seas 4 to 7 ft. Rain. Vsby 1 to 3 NM. .SAT NIGHT...NE winds 20 to 25 kt with gusts up to 30 kt. Seas 6 to 8 ft. Rain. Vsby 1 to 3 NM. .SUN AND SUN NIGHT...NE winds 20 to 25 kt. Seas 4 to 7 ft. Showers likely. .MON...NE winds 20 to 25 kt with gusts up to 30 kt. Seas 4 to 5 ft. Showers likely. .MON NIGHT...NE winds 15 to 20 kt with gusts up to 30 kt. Seas 4 to 5 ft. A chance of showers. .TUE...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 5 ft. .TUE NIGHT...NE winds 10 to 15 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. $$ ANZ237-222100- Block Island Sound- 401 AM EDT Fri Sep 22 2023 ...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH SATURDAY AFTERNOON... ...GALE WATCH IN EFFECT FROM SATURDAY AFTERNOON THROUGH SATURDAY EVENING... .TODAY...E winds 10 to 15 kt. Gusts up to 20 kt this afternoon. Seas 2 to 3 ft. .TONIGHT...E winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. A chance of rain. .SAT...NE winds 15 to 20 kt, increasing to 20 to 25 kt in the afternoon. Gusts up to 30 kt. Seas 5 to 8 ft. Rain. Vsby 1 NM or less. .SAT NIGHT...NE winds 20 to 25 kt with gusts up to 30 kt. Seas 7 to 9 ft. Rain. Vsby 1 to 3 NM. .SUN...NE winds 15 to 20 kt with gusts up to 30 kt. Seas 6 to 8 ft. Showers likely. .SUN NIGHT...NE winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 7 ft. Showers likely. .MON...NE winds around 20 kt with gusts up to 30 kt. Seas 4 to 5 ft. Showers likely. .MON NIGHT...NE winds 15 to 20 kt with gusts up to 30 kt. Seas 4 to 5 ft. A chance of showers. .TUE AND TUE NIGHT...NE winds 15 to 20 kt, diminishing to 10 to 15 kt. Gusts up to 25 kt. Seas 3 to 5 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ230-222100- Boston Harbor- 401 AM EDT Fri Sep 22 2023 .TODAY...E winds 5 to 10 kt. Waves 1 foot or less. .TONIGHT...E winds 5 to 10 kt. Waves 1 foot or less. .SAT...E winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Waves 1 foot or less, then 2 to 3 ft in the afternoon. Rain. Vsby 1 to 3 NM. .SAT NIGHT...NE winds 20 to 25 kt. Waves 2 to 3 ft. Rain. Vsby 1 to 3 NM. .SUN...NE winds 20 to 25 kt, diminishing to 15 to 20 kt in the afternoon. Waves 2 to 3 ft. A chance of showers. .SUN NIGHT...NE winds 10 to 15 kt, increasing to 15 to 20 kt after midnight. Gusts up to 25 kt. Waves 2 to 3 ft. Showers likely. Vsby 1 to 3 NM. .MON AND MON NIGHT...NE winds 15 to 20 kt with gusts up to 25 kt. A chance of showers. .TUE AND TUE NIGHT...NE winds 10 to 15 kt with gusts up to 20 kt. 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. $$ ANZ236-222100- Narragansett Bay- 401 AM EDT Fri Sep 22 2023 ...SMALL CRAFT ADVISORY IN EFFECT FROM SATURDAY MORNING THROUGH SUNDAY MORNING... .TODAY...E winds 5 to 10 kt. Waves 2 to 3 ft. .TONIGHT...E winds 10 to 15 kt, becoming NE 5 to 10 kt with gusts up to 20 kt after midnight. Waves 2 to 3 ft. .SAT...NE winds 10 to 15 kt with gusts up to 25 kt. Waves 2 to 3 ft. Rain. Vsby 1 to 3 NM. .SAT NIGHT...NE winds 15 to 20 kt with gusts up to 25 kt. Waves around 2 ft. Rain. Vsby 1 to 3 NM. .SUN AND SUN NIGHT...NE winds 15 to 20 kt with gusts up to 25 kt. Waves 2 to 3 ft. Showers likely. .MON...NE winds 15 to 20 kt with gusts up to 30 kt. Showers likely. .MON NIGHT...NE winds 15 to 20 kt with gusts up to 25 kt. A chance of showers. .TUE AND TUE NIGHT...NE winds 10 to 15 kt with gusts up to 25 kt. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ 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

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