Coastal Waters Forecast
Issued by NWS Boston, MA
Issued by NWS Boston, MA
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801 FZUS51 KBOX 270203 CWFBOX Coastal Waters Forecast for Massachusetts and Rhode Island National Weather Service Boston/Norton MA 1003 PM EDT Thu Sep 26 2024 Coastal waters from the Merrimack River MA to Watch Hill RI out to 25 NM ANZ200-271500- 1003 PM EDT Thu Sep 26 2024 .Synopsis for Massachusetts and Rhode Island coastal waters... Weak low pressure exits New England Thursday evening and into the Gulf of Maine Thursday night, then across Nova Scotia Friday. Easterly swells will slow subside as well. Quebec high pressure then builds southward over New England, beginning Friday night and continuing through the weekend. High pressure likely lingers into early next week. $$ ANZ250-271500- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 1003 PM EDT Thu Sep 26 2024 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH FRIDAY AFTERNOON... .OVERNIGHT...W winds 5 to 10 kt. Gusts up to 20 kt. Seas 4 to 6 ft. Wave Detail: E 6 ft at 11 seconds and SW 2 ft at 4 seconds. Isolated tstms. Numerous showers, then scattered showers. Vsby 1 to 3 NM. .FRI...W winds 5 to 10 kt, becoming SW in the afternoon. Seas 3 to 5 ft. Wave Detail: E 5 ft at 11 seconds. .FRI NIGHT...S winds around 5 kt, becoming N after midnight. Seas 3 to 4 ft. Wave Detail: E 4 ft at 10 seconds. .SAT...NE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at 10 seconds and NE 2 ft at 4 seconds. .SAT NIGHT AND SUN...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at 9 seconds and NE 1 foot at 4 seconds. .SUN NIGHT...SE winds around 5 kt, becoming S after midnight. Seas 2 to 3 ft. Wave Detail: E 3 ft at 9 seconds and E 1 foot at 4 seconds. .MON THROUGH TUE...E winds 5 to 10 kt. Seas 2 to 4 ft. .TUE NIGHT...E winds around 10 kt. Seas 3 to 5 ft. A chance of showers. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ251-271500- Massachusetts Bay and Ipswich Bay- 1003 PM EDT Thu Sep 26 2024 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 AM EDT FRIDAY... .OVERNIGHT...W winds 5 to 10 kt. Seas 3 to 5 ft. Wave Detail: E 5 ft at 11 seconds and S 1 foot at 4 seconds. Isolated tstms. Numerous showers, then scattered showers. Vsby 1 to 3 NM. .FRI...W winds around 5 kt, becoming S in the afternoon. Seas 3 to 4 ft. Wave Detail: E 4 ft at 11 seconds and S 1 foot at 3 seconds. .FRI NIGHT...SE winds around 5 kt, becoming N after midnight. Seas 2 to 3 ft. Wave Detail: E 3 ft at 10 seconds. .SAT...NE 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. .SAT NIGHT AND SUN...E winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E 2 ft at 9 seconds and NE 1 foot at 4 seconds. .SUN NIGHT...SE winds around 5 kt, becoming SW after midnight. Seas around 2 ft. Wave Detail: E 2 ft at 9 seconds and E 1 foot at 4 seconds. .MON THROUGH TUE...E winds 5 to 10 kt. Seas 2 to 3 ft. .TUE NIGHT...E winds around 10 kt. Seas 3 to 4 ft. A chance of showers. 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. $$ ANZ231-271500- Cape Cod Bay- 1003 PM EDT Thu Sep 26 2024 .OVERNIGHT...SW winds around 10 kt, becoming NW. Seas 2 to 3 ft. Wave Detail: E 3 ft at 11 seconds and SW 1 foot at 3 seconds. Numerous showers with isolated tstms. Vsby 1 to 3 NM. .FRI...NW winds around 5 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at 11 seconds and S 1 foot at 2 seconds. .FRI NIGHT...S winds around 5 kt, becoming N around 5 kt after midnight. Seas around 2 ft. Wave Detail: E 2 ft at 10 seconds and SW 1 foot at 4 seconds. .SAT...NE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E 2 ft at 10 seconds and SE 1 foot at 2 seconds. .SAT NIGHT THROUGH SUN NIGHT...E winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E 2 ft at 10 seconds and NE 1 foot at 2 seconds. .MON THROUGH TUE...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 2 ft at 9 seconds and E 1 foot at 3 seconds. .TUE NIGHT...E winds around 10 kt. Seas 2 to 3 ft. A chance of showers. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ254-271500- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm- 1003 PM EDT Thu Sep 26 2024 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH FRIDAY AFTERNOON... .OVERNIGHT...S winds around 15 kt, becoming W. Gusts up to 20 kt. Seas 5 to 7 ft. Wave Detail: E 6 ft at 11 seconds and S 2 ft at 3 seconds. Isolated tstms. Numerous showers, then scattered showers. Vsby 1 to 3 NM, decreasing to 1 NM or less. .FRI...W winds around 5 kt. Seas 4 to 6 ft. Wave Detail: E 5 ft at 11 seconds and S 1 foot at 4 seconds. Scattered showers in the morning. .FRI NIGHT...SW winds around 5 kt, becoming NW after midnight. Seas 3 to 4 ft. Wave Detail: E 4 ft at 10 seconds and SW 1 foot at 4 seconds. .SAT...NE winds 5 to 10 kt. Seas 2 to 4 ft. Wave Detail: E 4 ft at 10 seconds and S 1 foot at 4 seconds. .SAT NIGHT THROUGH SUN NIGHT...E winds 5 to 10 kt. Seas 2 to 4 ft. Wave Detail: E 3 ft at 9 seconds and E 2 ft at 4 seconds. .MON THROUGH TUE...E winds 5 to 10 kt. Seas 3 to 5 ft. Wave Detail: E 4 ft at 10 seconds and SE 2 ft at 6 seconds. .TUE NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. A chance of showers. 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. $$ ANZ255-271500- Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket- 1003 PM EDT Thu Sep 26 2024 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH FRIDAY MORNING... .OVERNIGHT...S winds 10 to 15 kt with gusts up to 20 kt, becoming W. Seas 3 to 5 ft. Wave Detail: E 5 ft at 11 seconds and S 2 ft at 4 seconds. Scattered showers. Isolated tstms with vsby 1 NM or less. .FRI...N winds 5 to 10 kt, becoming W in the afternoon. Seas 3 to 5 ft. Wave Detail: E 4 ft at 11 seconds and S 2 ft at 4 seconds. Scattered showers in the morning. .FRI NIGHT...S winds around 5 kt, becoming E around 5 kt after midnight. Seas 2 to 4 ft. Wave Detail: E 3 ft at 10 seconds and SW 1 foot at 4 seconds. .SAT...NE winds 5 to 10 kt, increasing to 10 to 15 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: E 3 ft at 10 seconds and SE 2 ft at 4 seconds. .SAT NIGHT THROUGH SUN NIGHT...E winds 10 to 15 kt. Seas 2 to 4 ft. Wave Detail: E 3 ft at 6 seconds and E 3 ft at 9 seconds. .MON AND MON NIGHT...E winds 5 to 10 kt. Seas 2 to 4 ft. Wave Detail: E 3 ft at 9 seconds and S 2 ft at 8 seconds. .TUE...E winds 10 to 15 kt. Seas 3 to 5 ft. A chance of showers. .TUE NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. A chance of showers. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ256-271500- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island- 1003 PM EDT Thu Sep 26 2024 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 AM EDT FRIDAY... .OVERNIGHT...SW winds 10 to 15 kt, becoming W. Seas 4 to 5 ft. Wave Detail: SE 5 ft at 11 seconds and S 1 foot at 4 seconds. Scattered showers. Isolated tstms with vsby 1 NM or less. .FRI...N winds 5 to 10 kt, becoming SE in the afternoon. Seas 3 to 5 ft. Wave Detail: E 4 ft at 11 seconds and S 1 foot at 4 seconds. Scattered showers in the morning. .FRI NIGHT...SE winds around 5 kt. Seas 3 to 4 ft. Wave Detail: E 4 ft at 10 seconds and S 1 foot at 5 seconds. .SAT...E winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: E 3 ft at 4 seconds and E 3 ft at 10 seconds. .SAT NIGHT THROUGH SUN NIGHT...E winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. Wave Detail: E 4 ft at 6 seconds and E 2 ft at 10 seconds. .MON AND MON NIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: E 3 ft at 8 seconds. .TUE...E winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. A chance of showers. .TUE NIGHT...E winds around 15 kt with gusts up to 20 kt. Seas 4 to 6 ft. A chance of showers. 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. $$ ANZ232-271500- Nantucket Sound- 1003 PM EDT Thu Sep 26 2024 .OVERNIGHT...SW winds 10 to 15 kt, becoming W 5 to 10 kt. Gusts up to 20 kt. Seas 2 to 4 ft. Wave Detail: E 3 ft at 12 seconds and S 2 ft at 3 seconds. Isolated tstms. Scattered showers, then numerous showers with vsby 1 NM or less. .FRI...NW winds around 5 kt, becoming SW in the afternoon. Seas 2 to 3 ft. Wave Detail: E 2 ft at 11 seconds and SW 1 foot at 4 seconds. Scattered showers in the morning. .FRI NIGHT...SW winds around 5 kt, becoming N around 5 kt after midnight. Seas around 2 ft. Wave Detail: E 2 ft at 10 seconds and SW 1 foot at 4 seconds. .SAT...NE winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E 2 ft at 10 seconds and S 1 foot at 4 seconds. .SAT NIGHT THROUGH SUN NIGHT...E winds 10 to 15 kt. Seas around 2 ft. Wave Detail: E 2 ft at 3 seconds and E 2 ft at 9 seconds. .MON AND MON NIGHT...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 2 ft at 9 seconds and E 1 foot at 5 seconds. .TUE AND TUE NIGHT...E winds 10 to 15 kt. Seas 2 to 4 ft. A chance of showers. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ233-271500- Vineyard Sound- 1003 PM EDT Thu Sep 26 2024 .OVERNIGHT...SW winds 10 to 15 kt with gusts up to 20 kt, becoming NW 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: S 2 ft at 4 seconds and SE 2 ft at 11 seconds. Scattered showers, then numerous showers with isolated tstms with vsby 1 NM or less. .FRI...N winds around 5 kt, becoming SW in the afternoon. Seas around 2 ft. Wave Detail: E 2 ft at 11 seconds and SW 1 foot at 4 seconds. Scattered showers in the morning. .FRI NIGHT...SW winds around 5 kt, becoming SE around 5 kt after midnight. Seas around 2 ft. Wave Detail: SW 1 foot at 4 seconds and SE 1 foot at 10 seconds. .SAT...E winds 5 to 10 kt. Seas around 2 ft in the morning, then 1 foot or less. Wave Detail: SE 1 foot at 4 seconds and SE 1 foot at 10 seconds, becoming E 1 foot at 3 seconds and SE 1 foot at 10 seconds. .SAT NIGHT THROUGH SUN NIGHT...E winds 5 to 10 kt. Seas around 2 ft. Wave Detail: NE 2 ft at 5 seconds and SE 1 foot at 10 seconds. .MON AND MON NIGHT...E winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E 1 foot at 5 seconds and E 1 foot at 9 seconds. .TUE AND TUE NIGHT...E winds 10 to 15 kt. Seas 2 to 3 ft. A chance of showers. 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. $$ ANZ234-271500- Buzzards Bay- 1003 PM EDT Thu Sep 26 2024 .OVERNIGHT...SW winds 10 to 15 kt, becoming NW 5 to 10 kt. Seas around 2 ft. Wave Detail: SW 2 ft at 3 seconds and E 2 ft at 11 seconds. Isolated tstms. Scattered showers, then numerous showers. Vsby 1 to 3 NM. .FRI...N winds around 5 kt, becoming SW in the afternoon. Seas around 2 ft. Wave Detail: E 2 ft at 11 seconds and SW 1 foot at 4 seconds. Scattered showers in the morning. .FRI NIGHT...S winds around 5 kt. Seas around 2 ft in the evening, then 1 foot or less. Wave Detail: E 2 ft at 10 seconds and SW 1 foot at 4 seconds, becoming S 1 foot at 4 seconds and E 1 foot at 10 seconds. .SAT...NE winds 5 to 10 kt. Seas 1 foot or less. Wave Detail: S 1 foot at 4 seconds and E 1 foot at 10 seconds. .SAT NIGHT THROUGH SUN NIGHT...E winds 5 to 10 kt. Seas around 2 ft. Wave Detail: NE 1 foot at 3 seconds and SE 1 foot at 10 seconds. .MON AND MON NIGHT...E winds 5 to 10 kt. Seas around 2 ft. Wave Detail: E 1 foot at 4 seconds and E 1 foot at 9 seconds. .TUE AND TUE NIGHT...E winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. A chance of showers. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ235-271500- Rhode Island Sound- 1003 PM EDT Thu Sep 26 2024 .OVERNIGHT...SW winds 10 to 15 kt, becoming NW 5 to 10 kt. Seas 2 to 4 ft. Wave Detail: SE 4 ft at 12 seconds and S 2 ft at 4 seconds. Isolated tstms. Scattered showers, then numerous showers with vsby 1 NM or less. .FRI...N winds around 5 kt, becoming SW in the afternoon. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 11 seconds and S 2 ft at 5 seconds. Scattered showers in the morning. .FRI NIGHT...SW winds around 5 kt, becoming E around 5 kt after midnight. Seas around 2 ft. Wave Detail: SE 2 ft at 10 seconds and S 1 foot at 5 seconds. .SAT...NE winds 5 to 10 kt, becoming E 10 to 15 kt in the afternoon. Seas around 2 ft. Wave Detail: E 2 ft at 4 seconds and SE 2 ft at 10 seconds. .SAT NIGHT THROUGH SUN NIGHT...E winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at 5 seconds and SE 2 ft at 10 seconds. .MON AND MON NIGHT...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 8 seconds. .TUE AND TUE NIGHT...E winds 10 to 15 kt. Seas 2 to 4 ft. A chance of showers. 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. $$ ANZ237-271500- Block Island Sound- 1003 PM EDT Thu Sep 26 2024 .OVERNIGHT...SW winds around 10 kt, becoming NW. Seas 2 to 4 ft. Wave Detail: SE 4 ft at 12 seconds and SW 1 foot at 4 seconds. Isolated tstms. Scattered showers, then numerous showers with vsby 1 NM or less. .FRI...N winds around 5 kt, becoming S in the afternoon. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 11 seconds and S 1 foot at 4 seconds. Scattered showers in the morning. .FRI NIGHT...S winds around 5 kt, becoming E after midnight. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 10 seconds and S 1 foot at 5 seconds. .SAT...E winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: E 2 ft at 4 seconds and SE 2 ft at 10 seconds. .SAT NIGHT THROUGH SUN NIGHT...E winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at 5 seconds and SE 2 ft at 10 seconds. .MON AND MON NIGHT...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 6 seconds and SE 1 foot at 9 seconds. .TUE AND TUE NIGHT...E winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. A chance of showers. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ ANZ230-271500- Boston Harbor- 1003 PM EDT Thu Sep 26 2024 .OVERNIGHT...W winds around 5 kt. Waves 2 to 3 ft. Numerous showers with isolated tstms. Vsby 1 to 3 NM. .FRI...W winds around 5 kt, becoming SW in the afternoon. Waves 2 to 3 ft. .FRI NIGHT...E winds around 5 kt, becoming N after midnight. Waves around 2 ft. .SAT...NE winds 5 to 10 kt. Waves around 2 ft in the morning, then 1 foot or less. .SAT NIGHT AND SUN...E winds 5 to 10 kt. Waves 1 foot or less. .SUN NIGHT...SE winds 5 to 10 kt, becoming SW after midnight. Waves 1 foot or less. .MON THROUGH TUE...E winds 5 to 10 kt. Waves 2 to 3 ft. .TUE NIGHT...E winds around 10 kt. Waves around 2 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. $$ ANZ236-271500- Narragansett Bay- 1003 PM EDT Thu Sep 26 2024 .OVERNIGHT...SW winds 5 to 10 kt, becoming NW. Waves around 2 ft. Isolated tstms. Numerous showers, then scattered showers. Vsby 1 to 3 NM. .FRI...N winds around 5 kt, becoming SW in the afternoon. Waves around 2 ft. .FRI NIGHT...SW winds around 5 kt, becoming NE around 5 kt after midnight. Waves around 2 ft. .SAT...NE winds 5 to 10 kt. Waves around 2 ft. .SAT NIGHT THROUGH SUN NIGHT...NE winds 5 to 10 kt. Waves 2 to 3 ft. .MON AND MON NIGHT...NE winds 5 to 10 kt. Waves 2 to 3 ft. .TUE AND TUE NIGHT...E winds 5 to 10 kt. Waves 2 to 3 ft. A chance of showers. Winds and waves higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. $$ For the latest updates...please visit our webpage at www.weather.gov/boston You can follow us on Facebook at www.facebook.com/NWSBoston You can follow us on Twitter at @NWSBoston