FZUS51 KBOX 150202 CWFBOX Coastal Waters Forecast for Massachusetts and Rhode Island National Weather Service Boston/Norton MA 1002 PM EDT Tue Apr 14 2026 Coastal waters from the Merrimack River MA to Watch Hill RI out to 25 NM ANZ200-151500- 1002 PM EDT Tue Apr 14 2026 .Synopsis for Massachusetts and Rhode Island coastal waters... A backdoor cold front moves south into northern New England tonight into Wednesday, perhaps flirting with the MA waters north of Cape Cod Wednesday and/or Thursday. A cold front likely crosses waters sometime Friday/Friday night followed by a stronger cold front sometime Sunday/Sunday night. Early next week, high pres builds from the Great Lakes to the Mid Atlantic. $$ ANZ250-151500- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 1002 PM EDT Tue Apr 14 2026 .OVERNIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. A chance of rain with isolated tstms. Patchy fog with vsby 1 NM or less. .WED...NW winds 5 to 10 kt, becoming E in the afternoon. Seas 2 to 3 ft. Patchy fog. A chance of showers in the afternoon. Vsby 1 NM or less. .WED NIGHT...E winds 5 to 10 kt, becoming NW after midnight. Seas around 2 ft. Patchy fog. A chance of showers. Vsby 1 NM or less, increasing to 1 to 3 NM after midnight. .THU...SW winds 5 to 10 kt, becoming S in the afternoon. Seas around 2 ft. Patchy fog in the morning. A chance of showers in the morning. .THU NIGHT...S winds around 10 kt, becoming SW after midnight. Seas around 2 ft. A chance of showers. .FRI...W winds 5 to 10 kt, becoming NE in the afternoon. Seas around 2 ft. A chance of showers. .FRI NIGHT...NE winds around 10 kt. Seas around 2 ft. A chance of showers. .SAT AND SAT NIGHT...NE winds 5 to 10 kt, becoming E. Seas 2 to 3 ft. .SUN...S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. A chance of showers. .SUN NIGHT...W winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 4 ft. Showers likely. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ251-151500- Massachusetts Bay and Ipswich Bay- 1002 PM EDT Tue Apr 14 2026 .OVERNIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt. Seas around 2 ft. A chance of rain with isolated tstms. Patchy fog with vsby 1 NM or less. .WED...N winds 5 to 10 kt, becoming E in the afternoon. Seas around 2 ft. Patchy fog. A chance of showers in the afternoon. Vsby 1 NM or less, increasing to 1 to 3 NM in the afternoon. .WED NIGHT...N winds 5 to 10 kt. Seas around 2 ft in the evening, then 1 foot or less. Patchy fog. A chance of showers. Vsby 1 NM or less, increasing to 1 to 3 NM after midnight. .THU...E winds 5 to 10 kt, becoming SE in the afternoon. Seas 1 foot or less. Patchy fog in the morning. A chance of showers in the morning. .THU NIGHT...S winds around 10 kt, becoming W after midnight. Seas around 2 ft. A chance of showers. .FRI...NW winds 5 to 10 kt, becoming NE in the afternoon. Seas 1 foot or less, then around 2 ft in the afternoon. A chance of showers. .FRI NIGHT...NE winds around 10 kt. Seas around 2 ft. A chance of showers in the evening. .SAT AND SAT NIGHT...NE winds around 10 kt, becoming E. Seas around 2 ft. .SUN...S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. A chance of showers. .SUN NIGHT...W winds 15 to 20 kt. Seas around 3 ft. Showers likely. Winds and seas 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. $$ ANZ231-151500- Cape Cod Bay- 1002 PM EDT Tue Apr 14 2026 .OVERNIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. A slight chance of rain with isolated tstms. Patchy fog with vsby 1 to 3 NM. .WED...W winds 5 to 10 kt, becoming SE in the afternoon. Seas 1 foot or less, then around 2 ft in the afternoon. Patchy fog in the morning with vsby 1 NM or less. .WED NIGHT...SW winds 5 to 10 kt, becoming W after midnight. Seas around 2 ft in the evening, then 1 foot or less. Patchy fog. A chance of showers. A chance of tstms in the evening. Vsby 1 to 3 NM after midnight. .THU...SW winds 5 to 10 kt, becoming S in the afternoon. Seas 1 foot or less, then around 2 ft in the afternoon. Patchy fog in the morning. A chance of showers in the morning. .THU NIGHT...SW winds 5 to 10 kt. Seas around 2 ft in the evening, then 1 foot or less. .FRI...SW winds 5 to 10 kt, becoming NE in the afternoon. Seas 1 foot or less. A chance of showers in the afternoon. .FRI NIGHT...NE winds 5 to 10 kt. Seas 1 foot or less. A chance of showers in the evening. .SAT AND SAT NIGHT...NE winds 5 to 10 kt, becoming E. Seas 1 foot or less, then around 2 ft. .SUN...S winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. A chance of showers. .SUN NIGHT...W winds 15 to 20 kt. Seas 2 to 3 ft. Showers likely. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ254-151500- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm- 1002 PM EDT Tue Apr 14 2026 .OVERNIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Patchy fog with vsby 1 NM or less. .WED...W winds around 10 kt, becoming S in the afternoon. Seas 2 to 4 ft. Patchy fog. Vsby 1 NM or less. .WED NIGHT...SW winds around 10 kt. Seas 2 to 3 ft. Patchy fog. A chance of showers. Vsby 1 NM or less, increasing to 1 to 3 NM after midnight. .THU...SW winds 10 to 15 kt. Seas 2 to 4 ft. Patchy fog in the morning. A chance of showers in the morning. .THU NIGHT...SW winds 10 to 15 kt. Seas 2 to 4 ft. .FRI AND FRI NIGHT...NE winds 5 to 10 kt. Seas 2 to 4 ft. A chance of showers through the night. .SAT THROUGH SUN...S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. .SUN NIGHT...W winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. Showers likely. 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. $$ ANZ255-151500- Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket- 1002 PM EDT Tue Apr 14 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 AM EDT WEDNESDAY... .OVERNIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. Patchy fog with vsby 1 to 3 NM. .WED...SW winds 10 to 15 kt. Seas 3 to 4 ft. Patchy fog in the morning with vsby 1 to 3 NM. .WED NIGHT...SW winds 10 to 15 kt. Seas 3 to 4 ft. A chance of showers. Patchy fog after midnight. .THU...SW winds 10 to 15 kt. Seas 3 to 4 ft. Patchy fog in the morning. .THU NIGHT AND FRI...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. .FRI NIGHT...E winds around 10 kt, becoming NE after midnight. Seas 2 to 4 ft. .SAT THROUGH SUN...S winds 15 to 20 kt. Seas 2 to 4 ft. .SUN NIGHT...W winds 20 to 25 kt with gusts up to 30 kt. Seas 3 to 5 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ256-151500- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island- 1002 PM EDT Tue Apr 14 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 AM EDT WEDNESDAY... .OVERNIGHT...SW winds 10 to 15 kt with gusts up to 25 kt. Seas 4 to 5 ft. Patchy fog with vsby 1 to 3 NM. .WED...SW winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Seas 3 to 4 ft. Patchy fog in the morning with vsby 1 to 3 NM. .WED NIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas 3 to 4 ft. A chance of showers. Patchy fog after midnight. .THU...SW winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Seas 3 to 4 ft. Patchy fog in the morning. .THU NIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas around 4 ft. .FRI...SW winds around 10 kt. Seas 3 to 4 ft. A chance of showers in the afternoon. .FRI NIGHT...NE winds around 10 kt. Seas 3 to 4 ft. .SAT AND SAT NIGHT...NE winds around 10 kt, becoming E. Seas 2 to 3 ft. .SUN...S winds 15 to 20 kt. Seas 2 to 4 ft. A chance of showers. .SUN NIGHT...W winds 20 to 25 kt with gusts up to 30 kt. Seas 3 to 5 ft. Showers likely. 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. $$ ANZ232-151500- Nantucket Sound- 1002 PM EDT Tue Apr 14 2026 .OVERNIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Patchy fog with vsby 1 to 3 NM. .WED...SW winds 10 to 15 kt. Seas 2 to 3 ft. Patchy fog in the morning with vsby 1 to 3 NM. .WED NIGHT...SW winds 10 to 15 kt, diminishing to 5 to 10 kt after midnight. Seas around 2 ft. Patchy fog. A chance of showers. Vsby 1 to 3 NM after midnight. .THU...SW winds 5 to 10 kt, increasing to 10 to 15 kt in the afternoon. Seas around 2 ft. Patchy fog in the morning. .THU NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. .FRI AND FRI NIGHT...NE winds 5 to 10 kt. Seas around 2 ft. A chance of showers through the night. .SAT AND SAT NIGHT...NE winds 5 to 10 kt, becoming E. Seas around 2 ft. .SUN AND SUN NIGHT...S winds 10 to 15 kt, becoming W 15 to 20 kt. Gusts up to 25 kt. Seas 2 to 3 ft. A chance of showers. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ233-151500- Vineyard Sound- 1002 PM EDT Tue Apr 14 2026 .OVERNIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Patchy fog with vsby 1 to 3 NM. .WED...SW winds 10 to 15 kt. Seas 2 to 3 ft. Patchy fog in the morning with vsby 1 to 3 NM. .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. Patchy fog after midnight with vsby 1 to 3 NM. .THU...SW winds 5 to 10 kt, increasing to 10 to 15 kt in the afternoon. Seas 2 to 3 ft. Patchy fog in the morning. .THU NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. .FRI AND FRI NIGHT...NE winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers through the night. .SAT AND SAT NIGHT...NE winds around 10 kt, becoming E. Seas around 2 ft. .SUN...S winds 15 to 20 kt. Seas 2 to 3 ft. A chance of showers. .SUN NIGHT...W winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 3 ft. Showers likely. 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. $$ ANZ234-151500- Buzzards Bay- 1002 PM EDT Tue Apr 14 2026 .OVERNIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt. Seas 2 to 3 ft. Patchy fog with vsby 1 to 3 NM. .WED...SW winds 5 to 10 kt, becoming S 10 to 15 kt in the afternoon. Seas around 2 ft. Patchy fog in the morning with vsby 1 to 3 NM. .WED NIGHT...SW winds 10 to 15 kt, diminishing to 5 to 10 kt after midnight. Seas around 2 ft. Patchy fog. A chance of showers. A chance of tstms in the evening. Vsby 1 to 3 NM after midnight. .THU...S winds 5 to 10 kt, becoming SW 10 to 15 kt in the afternoon. Seas around 2 ft. Patchy fog in the morning. .THU NIGHT...SW winds 10 to 15 kt, diminishing to 5 to 10 kt after midnight. Seas around 2 ft. .FRI AND FRI NIGHT...NE winds 5 to 10 kt. Seas around 2 ft. A chance of showers through the night. .SAT AND SAT NIGHT...NE winds 5 to 10 kt, becoming E. Seas around 2 ft. .SUN...S winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. A chance of showers. .SUN NIGHT...W winds 15 to 20 kt. Seas 2 to 3 ft. Showers likely. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ235-151500- Rhode Island Sound- 1002 PM EDT Tue Apr 14 2026 .OVERNIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. Patchy fog with vsby 1 to 3 NM. .WED...SW winds 10 to 15 kt. Seas 2 to 4 ft. Patchy fog in the morning with vsby 1 to 3 NM. .WED NIGHT...SW winds 10 to 15 kt. Seas 2 to 4 ft. Patchy fog. A chance of showers. Vsby 1 to 3 NM. .THU...SW winds 10 to 15 kt. Seas 3 to 4 ft. Patchy fog in the morning. .THU NIGHT...SW winds 10 to 15 kt. Seas 3 to 4 ft. .FRI...SW winds around 10 kt. Seas 2 to 3 ft. A chance of showers in the afternoon. .FRI NIGHT...NE winds around 10 kt. Seas 2 to 3 ft. A chance of showers in the evening. .SAT AND SAT NIGHT...NE winds around 10 kt, becoming E. Seas 2 to 3 ft. .SUN...S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. A chance of showers. .SUN NIGHT...W winds 20 to 25 kt. Seas 3 to 4 ft. Showers likely. 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. $$ ANZ237-151500- Block Island Sound- 1002 PM EDT Tue Apr 14 2026 .OVERNIGHT...SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Patchy fog with vsby 1 to 3 NM. .WED...SW winds 5 to 10 kt, increasing to 10 to 15 kt in the afternoon. Seas 2 to 3 ft. Patchy fog in the morning with vsby 1 to 3 NM. .WED NIGHT...SW winds 10 to 15 kt, diminishing to 5 to 10 kt after midnight. Seas 2 to 3 ft. A chance of showers. A chance of tstms in the evening. Patchy fog after midnight. .THU...SW winds 5 to 10 kt, increasing to 10 to 15 kt in the afternoon. Seas 2 to 3 ft. .THU NIGHT...SW winds 10 to 15 kt, diminishing to 5 to 10 kt after midnight. Seas 2 to 3 ft. .FRI AND FRI NIGHT...NE winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers through the night. .SAT AND SAT NIGHT...NE winds 5 to 10 kt, becoming SE. Seas 2 to 3 ft. .SUN...S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. A chance of showers. .SUN NIGHT...W winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. Showers likely. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ230-151500- Boston Harbor- 1002 PM EDT Tue Apr 14 2026 .OVERNIGHT...SW winds 10 to 15 kt, diminishing to 5 to 10 kt. Waves around 2 ft, then 1 foot or less. A chance of rain with isolated tstms. Patchy fog with vsby 1 to 3 NM. .WED...NW winds 5 to 10 kt, becoming E in the afternoon. Waves 1 foot or less. Patchy fog in the morning. A chance of showers and tstms in the afternoon. Vsby 1 to 3 NM in the morning. .WED NIGHT...N winds 5 to 10 kt. Waves 1 foot or less. Patchy fog. A chance of showers. A chance of tstms in the evening. Vsby 1 to 3 NM. .THU...SE winds 5 to 10 kt. Waves 1 foot or less. A chance of showers. Patchy fog in the morning. .THU NIGHT...S winds around 10 kt, becoming SW 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 AND SAT NIGHT...NE winds 5 to 10 kt, becoming E. Waves 1 foot or less. .SUN...S winds 10 to 15 kt with gusts up to 20 kt. Waves around 2 ft. A chance of showers. .SUN NIGHT...W winds 15 to 20 kt. Waves around 2 ft. Showers likely. 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. $$ ANZ236-151500- Narragansett Bay- 1002 PM EDT Tue Apr 14 2026 .OVERNIGHT...SW winds 5 to 10 kt. Gusts up to 20 kt. Waves 2 to 3 ft. Isolated tstms. A chance of rain, then a slight chance of rain. Patchy fog with vsby 1 to 3 NM. .WED...SW winds 5 to 10 kt, becoming S 10 to 15 kt in the afternoon. Waves around 2 ft. Patchy fog in the morning with vsby 1 to 3 NM. .WED NIGHT...SW winds 5 to 10 kt. Waves around 2 ft. A chance of showers. A chance of tstms in the evening. Patchy fog after midnight with vsby 1 to 3 NM. .THU...S winds 5 to 10 kt, increasing to 10 to 15 kt in the afternoon. Waves around 2 ft. Patchy fog in the morning. .THU NIGHT...SW winds 10 to 15 kt, diminishing to 5 to 10 kt after midnight. Waves around 2 ft. .FRI AND FRI NIGHT...NE winds 5 to 10 kt. Waves around 2 ft. A chance of showers through the night. .SAT AND SAT NIGHT...NE winds 5 to 10 kt, becoming E. Waves around 2 ft. .SUN AND SUN NIGHT...S winds 10 to 15 kt, becoming W 15 to 20 kt. Waves 2 to 3 ft. A chance of showers. Winds and waves higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ 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