FZUS51 KBOX 141702 CWFBOX Coastal Waters Forecast for Massachusetts and Rhode Island National Weather Service Boston/Norton MA 102 PM EDT Tue Apr 14 2026 Coastal waters from the Merrimack River MA to Watch Hill RI out to 25 NM ANZ200-150600- 102 PM EDT Tue Apr 14 2026 .Synopsis for Massachusetts and Rhode Island coastal waters... A backdoor cold front will move S into nrn New Eng Tue and Wed, perhaps flirting with the MA waters N of Cape Cod Wed and/or Thu. A cold front will likely cross the waters sometime Fri/Fri night followed by a stronger cold front sometime Sun/Sun night. Early next week, high pres builds from the Great Lakes to the Mid Atlantic. $$ ANZ250-150600- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 102 PM EDT Tue Apr 14 2026 .THIS AFTERNOON...SE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. .TONIGHT...S winds around 15 kt, becoming W after midnight. Gusts up to 20 kt. Seas 2 to 3 ft. Patchy fog. A chance of showers in the evening. Vsby 1 NM or less. .WED...N winds around 10 kt, becoming SE in the afternoon. Seas 2 to 3 ft. Patchy fog. A chance of showers in the afternoon. Vsby 1 NM or less. .WED NIGHT...SE winds 5 to 10 kt, becoming NW after midnight. Seas around 2 ft. A chance of showers. Patchy fog in the evening with vsby 1 NM or less. .THU...SE winds 5 to 10 kt. Seas around 2 ft. A chance of showers in the morning. .THU NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. A chance of showers in the evening. .FRI AND FRI NIGHT...NE winds 5 to 10 kt, increasing to 10 to 15 kt. Seas around 2 ft. A chance of showers. .SAT AND SAT NIGHT...NE winds 10 to 15 kt, becoming E. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ251-150600- Massachusetts Bay and Ipswich Bay- 102 PM EDT Tue Apr 14 2026 .THIS AFTERNOON...SE winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. .TONIGHT...S winds 10 to 15 kt with gusts up to 20 kt, becoming W after midnight. Seas 2 to 3 ft. Patchy fog. A chance of showers in the evening. Vsby 1 to 3 NM, decreasing to 1 NM or less after midnight. .WED...N winds 5 to 10 kt, becoming SE in the afternoon. Seas around 2 ft. A chance of showers in the afternoon. .WED NIGHT...E winds 5 to 10 kt, becoming N after midnight. Seas around 2 ft. A chance of showers. Patchy fog in the evening with vsby 1 NM or less. .THU...SE winds 5 to 10 kt. Seas 1 foot or less, then around 2 ft in the afternoon. A chance of showers. .THU NIGHT...SW winds 5 to 10 kt, becoming W after midnight. Seas around 2 ft. A chance of showers. .FRI AND FRI NIGHT...NE winds 5 to 10 kt, increasing to 10 to 15 kt. Seas around 2 ft. A chance of showers. .SAT AND SAT NIGHT...NE winds 10 to 15 kt, becoming E. 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. $$ ANZ231-150600- Cape Cod Bay- 102 PM EDT Tue Apr 14 2026 .THIS AFTERNOON...SE winds 5 to 10 kt. Seas around 2 ft. .TONIGHT...SW winds 10 to 15 kt. Seas around 2 ft. Patchy fog after midnight with vsby 1 to 3 NM. .WED...W winds 5 to 10 kt, becoming S in the afternoon. Seas 1 foot or less, then around 2 ft in the afternoon. .WED NIGHT...S winds 5 to 10 kt, becoming W after midnight. Seas 1 foot or less. A chance of showers. .THU AND THU NIGHT...SW winds 5 to 10 kt. Seas 1 foot or less. .FRI AND FRI NIGHT...S winds 5 to 10 kt, becoming NE. Seas 1 foot or less. A chance of showers. .SAT AND SAT NIGHT...NE winds 5 to 10 kt, becoming E. Seas around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ254-150600- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm- 102 PM EDT Tue Apr 14 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 PM EDT THIS AFTERNOON... .THIS AFTERNOON...S winds 5 to 10 kt. Seas 2 to 4 ft. Patchy fog. Vsby 1 NM or less. .TONIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Patchy fog. Vsby 1 NM or less. .WED...W winds around 10 kt, becoming S in the afternoon. Seas 2 to 4 ft. Patchy fog in the afternoon with vsby 1 to 3 NM. .WED NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers. Patchy fog in the evening with vsby 1 NM or less. .THU AND THU NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. .FRI AND FRI NIGHT...SW winds around 10 kt, becoming E. Seas 2 to 3 ft. A chance of showers. .SAT AND SAT NIGHT...NE winds around 10 kt, becoming SE. 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. $$ ANZ255-150600- Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket- 102 PM EDT Tue Apr 14 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 PM EDT THIS AFTERNOON... .THIS AFTERNOON...S winds 5 to 10 kt. Seas 3 to 5 ft. Patchy fog. Vsby 1 NM or less. .TONIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. Patchy fog. Vsby 1 NM or less, increasing to 1 to 3 NM after midnight. .WED...W winds 10 to 15 kt, becoming SW in the afternoon. Seas 3 to 4 ft. .WED NIGHT...SW winds 10 to 15 kt. Seas 3 to 4 ft. A chance of showers. .THU AND THU NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. .FRI AND FRI NIGHT...SW winds around 10 kt, becoming E. Seas 2 to 4 ft. A chance of showers. .SAT AND SAT NIGHT...NE winds 10 to 15 kt, becoming SE. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ256-150600- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island- 102 PM EDT Tue Apr 14 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 PM EDT THIS AFTERNOON... .THIS AFTERNOON...S winds 10 to 15 kt. Seas around 4 ft. Patchy fog. Vsby 1 NM or less. .TONIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 4 ft. Patchy fog. Vsby 1 NM or less, increasing to 1 to 3 NM after midnight. .WED...W winds 10 to 15 kt, becoming S in the afternoon. Seas 3 to 4 ft. .WED NIGHT...SW winds 10 to 15 kt. Seas 3 to 4 ft. A chance of showers. .THU AND THU NIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. .FRI AND FRI NIGHT...SW winds 10 to 15 kt, becoming E. Seas 3 to 4 ft. A chance of showers. .SAT AND SAT NIGHT...NE winds 10 to 15 kt, becoming E. 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. $$ ANZ232-150600- Nantucket Sound- 102 PM EDT Tue Apr 14 2026 .THIS AFTERNOON...S winds 5 to 10 kt. Seas around 2 ft. .TONIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. Patchy fog. Vsby 1 NM or less. .WED...W winds around 10 kt, becoming S in the afternoon. Seas around 2 ft. .WED NIGHT...SW winds 5 to 10 kt. Seas around 2 ft. A chance of showers. .THU AND THU NIGHT...SW winds 10 to 15 kt. Seas around 2 ft. .FRI AND FRI NIGHT...SW winds around 10 kt, becoming E. Seas around 2 ft. A chance of showers. .SAT AND SAT NIGHT...NE winds 5 to 10 kt, becoming E. Seas around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ233-150600- Vineyard Sound- 102 PM EDT Tue Apr 14 2026 .THIS AFTERNOON...S winds 10 to 15 kt. Seas 2 to 3 ft. .TONIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. Patchy fog. Vsby 1 to 3 NM, decreasing to 1 NM or less after midnight. .WED...W winds 5 to 10 kt, becoming S 10 to 15 kt in the afternoon. Seas 2 to 3 ft. .WED NIGHT...SW winds 10 to 15 kt, diminishing to 5 to 10 kt after midnight. Seas 2 to 3 ft. A chance of showers. .THU AND THU NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. .FRI AND FRI NIGHT...SW winds 5 to 10 kt, becoming E. Seas 2 to 3 ft. A chance of showers. .SAT AND SAT NIGHT...NE winds 5 to 10 kt, becoming E. 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. $$ ANZ234-150600- Buzzards Bay- 102 PM EDT Tue Apr 14 2026 .THIS AFTERNOON...S winds 10 to 15 kt. Seas around 2 ft. .TONIGHT...SW winds 10 to 15 kt. Seas around 2 ft. Patchy fog. Vsby 1 to 3 NM, decreasing to 1 NM or less after midnight. .WED...W winds 5 to 10 kt, becoming S 10 to 15 kt in the afternoon. Seas around 2 ft. .WED NIGHT...SW winds 10 to 15 kt, diminishing to 5 to 10 kt after midnight. Seas around 2 ft. A chance of showers. .THU AND THU NIGHT...SW winds 10 to 15 kt. Seas around 2 ft. .FRI AND FRI NIGHT...S winds 5 to 10 kt, becoming NE. Seas around 2 ft. A chance of showers. .SAT AND SAT NIGHT...NE winds 5 to 10 kt, becoming E. Seas around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ235-150600- Rhode Island Sound- 102 PM EDT Tue Apr 14 2026 .THIS AFTERNOON...S winds 10 to 15 kt. Seas 3 to 4 ft. Patchy fog. Vsby 1 NM or less. .TONIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas 3 to 4 ft. Patchy fog. Vsby 1 to 3 NM, decreasing to 1 NM or less after midnight. .WED...SW winds 10 to 15 kt. Seas 2 to 3 ft. .WED NIGHT...SW winds 10 to 15 kt, diminishing to 5 to 10 kt after midnight. Seas 2 to 3 ft. A chance of showers. .THU AND THU NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. .FRI AND FRI NIGHT...SW winds around 10 kt, becoming E. Seas 2 to 3 ft. A chance of showers. .SAT AND SAT NIGHT...NE winds 10 to 15 kt, becoming E. 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. $$ ANZ237-150600- Block Island Sound- 102 PM EDT Tue Apr 14 2026 .THIS AFTERNOON...S winds 5 to 10 kt. Seas 3 to 4 ft. .TONIGHT...SW winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt after midnight. Seas 2 to 3 ft. Patchy fog after midnight with vsby 1 to 3 NM. .WED...SW winds 5 to 10 kt, becoming S 10 to 15 kt in the afternoon. Seas 2 to 3 ft. .WED NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers. .THU AND THU NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. .FRI AND FRI NIGHT...SW winds 5 to 10 kt, becoming E. Seas 2 to 3 ft. A chance of showers. .SAT AND SAT NIGHT...E winds around 10 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ230-150600- Boston Harbor- 102 PM EDT Tue Apr 14 2026 .THIS AFTERNOON...SE winds 10 to 15 kt with gusts up to 20 kt. Waves around 2 ft. A slight chance of showers and tstms. .TONIGHT...S winds 10 to 15 kt with gusts up to 20 kt, becoming W 5 to 10 kt after midnight. Waves around 2 ft in the evening, then 1 foot or less. Patchy fog. A chance of showers in the evening. Vsby 1 to 3 NM. .WED...E winds 5 to 10 kt. Waves 1 foot or less. A chance of showers in the afternoon. .WED NIGHT...E winds 5 to 10 kt, becoming N after midnight. Waves 1 foot or less. A chance of showers. .THU...SE winds 5 to 10 kt. Waves 1 foot or less. A chance of showers. .THU NIGHT...SW winds 5 to 10 kt, becoming W after midnight. Waves 1 foot or less. A chance of showers. .FRI AND FRI NIGHT...NE winds 5 to 10 kt. Waves 1 foot or less. A chance of showers. .SAT...NE winds 10 to 15 kt. Waves 1 foot or less. .SAT NIGHT...E winds 5 to 10 kt. Waves 1 foot or less. A chance of showers. Winds and waves higher in and near tstms. 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. $$ ANZ236-150600- Narragansett Bay- 102 PM EDT Tue Apr 14 2026 .THIS AFTERNOON...S winds 10 to 15 kt. Waves 2 to 3 ft. .TONIGHT...SW winds 5 to 10 kt. Waves around 2 ft. Patchy fog after midnight with vsby 1 to 3 NM. .WED...SW winds 5 to 10 kt, becoming S 10 to 15 kt in the afternoon. Waves around 2 ft. .WED NIGHT...SW winds 5 to 10 kt. Waves around 2 ft. A chance of showers. .THU AND THU NIGHT...SW winds 5 to 10 kt. Waves around 2 ft. .FRI AND FRI NIGHT...S winds 5 to 10 kt, becoming NE. Waves around 2 ft. A chance of showers. .SAT AND SAT NIGHT...NE winds 5 to 10 kt, becoming SE. Waves around 2 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ For the latest updates...please visit our webpage at www.weather.gov/boston You can follow us on Facebook at www.facebook.com/us.nationalweatherservice.boston.gov You can follow us on Twitter at @NWSBoston